Cisco ONS 15454 SDH Troubleshooting Guide, Release 8.0
Chapter 1, General Troubleshooting
Downloads: This chapterpdf (PDF - 2.16MB) The complete bookPDF (PDF - 11.12MB) | Feedback

General Troubleshooting

Table Of Contents

General Troubleshooting

1.1  Troubleshooting Circuit Paths with Loopbacks

1.1.1  Facility Loopbacks

1.1.2  Terminal Loopbacks

1.1.3  Hairpin Circuits

1.1.4  Cross-Connect Loopbacks

1.2  Troubleshooting Electrical Circuit Paths With Loopbacks

1.2.1  Perform a Facility Loopback on a Source Electrical Port (West to East)

Create the Facility Loopback on the Source Electrical Port

Test and Clear the Electrical Port Facility Loopback Circuit

Test the Electrical Cabling

Test the Electrical Card

Test the FMEC

1.2.2  Perform a Hairpin Test on a Source-Node Electrical Port (West to East)

Create the Hairpin Circuit on the Source-Node Electrical Port

Test and Delete the Electrical Port Hairpin Circuit

Test the Standby XC-VXL Cross-Connect Card

Retest the Original XC-VXL Cross-Connect Card

1.2.3  Perform an XC Loopback on a Destination-Node STM-N VC (West to East) Carrying an Electrical Signal

Test and Clear the XC Loopback Circuit

Test the Standby XC-VXC-10G Cross-Connect Card

Retest the Original XC-VXC-10G Cross-Connect Card

1.2.4  Perform a Terminal Loopback on a Destination Electrical Port (West to East)

Create the Terminal Loopback on a Destination Electrical Port

Test and Clear the Destination Electrical Port Terminal Loopback Circuit

Test the Destination Electrical Card

1.2.5  Perform a Facility Loopback on a Destination-Node Electrical Port (East to West)

Create a Facility Loopback Circuit on a Destination Electrical Port

Test and Clear the Facility Loopback Electrical Circuit

Test the Electrical Cabling

Test the Electrical Card

Test the FMEC

1.2.6  Perform a Hairpin Test on a Destination-Node Electrical Port (East to West)

Create the Hairpin Circuit on the Destination-Node Port

Test and Delete the Electrical Hairpin Circuit

Test the Standby XC-VXL Cross-Connect Card

Retest the Original XC-VXL Cross-Connect Card

1.2.7  Perform an XC Loopback on a Source-Node STM-N VC (East to West) Carrying an Electrical Circuit

Create the XC Loopback on the Source Optical Port Carrying an Electrical Circuit

Test and Clear the XC Loopback Circuit

Test the Standby XC-VXL Cross-Connect Card

Retest the Original XC-VXL Cross-Connect Card

1.2.8  Perform a Terminal Loopback on a Source-Node Electrical Port (East to West)

Create the Terminal Loopback on a Source-Node Electrical Port

Test and Clear the Electrical Port Terminal Loopback Circuit

Test the Source Electrical Card

1.3  Troubleshooting Optical Circuit Paths With Loopbacks

1.3.1  Perform a Facility Loopback on a Source-Node Optical Port

Create the Facility Loopback on the Source Optical Port

Test and Clear the Facility Circuit

Test the Optical Card

1.3.2  Perform a Terminal Loopback on a Source-Node Optical Port

Create the Terminal Loopback on a Source-Node Optical Port

Test and Clear the Terminal Loopback Circuit

Test the Optical Card

1.3.3  Perform an XC Loopback on the Source Optical Port

Create the XC Loopback on the Source STM-N Port

Test and Clear the XC Loopback Circuit

Test the Standby XC-VXL Cross-Connect Card

Retest the Original XC-VXL Cross-Connect Card

1.3.4  Perform a Facility Loopback on an Intermediate-Node Optical Port

Create the Facility Loopback on an Intermediate-Node Optical Port

Test and Clear the Facility Loopback Circuit

Test the Optical Card

1.3.5  Perform a Terminal Loopback on an Intermediate-Node Optical Ports

Create the Terminal Loopback on Intermediate-Node Optical Ports

Test and Clear the Optical Terminal Loopback Circuit

Test the Optical Card

1.3.6  Perform a Facility Loopback on a Destination-Node Optical Port

Create the Facility Loopback on a Destination-Node Optical Port

Test the Optical Facility Loopback Circuit

Test the Optical Card

1.3.7  Perform a Terminal Loopback on a Destination-Node Optical Port

Create the Terminal Loopback on a Destination-Node Optical Port

Test and Clear the Optical Terminal Loopback Circuit

Test the Optical Card

1.4  Troubleshooting Ethernet Circuit Paths With Loopbacks

1.4.1  Perform a Facility Loopback on a Source-Node Ethernet Port

Create the Facility Loopback on the Source-Node Ethernet Port

Test and Clear the Facility Loopback Circuit

Test the Ethernet Card

1.4.2  Perform a Terminal Loopback on a Source-Node Ethernet Port

Create the Terminal Loopback on a Source-Node Ethernet Port

Test and Clear the Ethernet Terminal Loopback Circuit

Test the Ethernet Card

1.4.3  Perform a Hairpin Test on a Source-Node Ethernet Port

Create the Hairpin Circuit on the Source-Node Ethernet Port

Test and Delete the Ethernet Port Hairpin Circuit

Test the Standby XC-VXL Cross-Connect Card

Retest the Original XC-VXL Cross-Connect Card

1.4.4  Perform a Facility Loopback on an Intermediate-Node Ethernet Port

Create a Facility Loopback on an Intermediate-Node Ethernet Port

Test and Clear the Ethernet Facility Loopback Circuit

Test the Ethernet Card

1.4.5  Perform a Terminal Loopback on an Intermediate-Node Ethernet Port

Create a Terminal Loopback on an Intermediate-Node Ethernet Port

Test and Clear the Ethernet Terminal Loopback Circuit

Test the Ethernet Card

1.4.6  Perform a Facility Loopback on a Destination-Node Ethernet Port

Create the Facility Loopback on a Destination-Node Ethernet Port

Test and Clear the Ethernet Facility Loopback Circuit

Test the Ethernet Card

1.4.7  Perform a Terminal Loopback on a Destination-Node Ethernet Port

Create the Terminal Loopback on a Destination-Node Ethernet Port

Test and Clear the Ethernet Terminal Loopback Circuit

Test the Ethernet Card

1.4.8  Perform a Hairpin Test on a Destination-Node Ethernet Port

Create the Hairpin Circuit on the Destination-Node Port

Test and Delete the Ethernet Hairpin Circuit

Test the Standby XC-VXL Cross-Connect Card

Retest the Original XC-VXL Cross-Connect Card

1.5  Troubleshooting FC_MR Circuit Paths With Loopbacks

1.5.1  Perform a Facility Loopback on a Source-Node FC_MR Port

Create the Facility Loopback on the Source-Node FC_MR Port

Test and Clear the FC_MR Facility Loopback Circuit

Test the FC_MR Card

1.5.2  Perform a Terminal Loopback on a Source-Node FC_MR Port

Create the Terminal Loopback on a Source-Node FC_MR Port

Test and Clear the FC_MR Port Terminal Loopback Circuit

Test the FC_MR Card

1.5.3  Perform a Facility Loopback on an Intermediate-Node FC_MR Port

Create a Facility Loopback on an Intermediate-Node FC_MR Port

Test and Clear the FC_MR Port Facility Loopback Circuit

Test the FC_MR Card

1.5.4  Perform a Terminal Loopback on Intermediate-Node FC_MR Ports

Create a Terminal Loopback on Intermediate-Node FC_MR Ports

Test and Clear the FC_MR Terminal Loopback Circuit

Test the FC_MR Card

1.5.5  Perform a Facility Loopback on a Destination-Node FC_MR Port

Create the Facility Loopback on a Destination-Node FC_MR Port

Test and Clear the FC_MR Facility Loopback Circuit

Test the FC_MR Card

1.5.6  Perform a Terminal Loopback on a Destination-Node FC_MR Port

Create the Terminal Loopback on a Destination-Node FC_MR Port

Test and Clear the FC_MR Terminal Loopback Circuit

Test the FC_MR Card

1.6  Using CTC Diagnostics

1.6.1  Card LED Lamp Tests

Verify General Card LED Operation

Verify G-Series Ethernet or FC_MR Card LED Operation

Verify E-Series and ML-Series Ethernet Card LED Operation

1.6.2  Retrieve Diagnostics File Button

Off-Load the Diagnostics File

1.6.3  Data Communications Network Tool

1.7  Restoring the Database and Default Settings

1.7.1  Restore the Node Database

1.8  PC Connectivity Troubleshooting

1.8.1  PC System Minimum Requirements

1.8.2  Sun System Minimum Requirements

1.8.3  Supported Platforms, Browsers, and JREs

1.8.4  Unsupported Platforms and Browsers

1.8.5  Unable to Verify the IP Configuration of Your PC

Verify the IP Configuration of Your PC

1.8.6  Browser Login Does Not Launch Java

Reconfigure the PC Operating System Java Plug-in Control Panel

Reconfigure the Browser

1.8.7  Unable to Verify the NIC Connection on Your PC

1.8.8  Verify PC Connection to the ONS 15454 SDH (ping)

Ping the ONS 15454 SDH

1.8.9  The IP Address of the Node is Unknown

Retrieve Unknown Node IP Address

1.9  CTC Operation Troubleshooting

1.9.1  Unable to Launch CTC Help After Removing Netscape

Reset Internet Explorer as the Default Browser for CTC

1.9.2  Unable to Change Node View to Network View

Reset the CTC_HEAP Environment Variable for Windows

Reset the CTC_HEAP Environment Variable for Solaris

1.9.3  Browser Stalls When Downloading CTC JAR Files From TCC2/TCC2P Card

Disable the VirusScan Download Scan

1.9.4  CTC Does Not Launch

Redirect the Netscape Cache to a Valid Directory

1.9.5  Slow CTC Operation or Login Problems

Delete the CTC Cache File Automatically

Delete the CTC Cache File Manually

1.9.6  Node Icon is Gray on CTC Network View

1.9.7  CTC Cannot Launch Due to Applet Security Restrictions

Manually Edit the java.policy File

1.9.8  Java Runtime Environment Incompatible

Launch CTC to Correct the Core Version Build

1.9.9  Different CTC Releases Do Not Recognize Each Other

Launch CTC to Correct the Core Version Build

1.9.10  Username or Password Do Not Match

Verify Correct Username and Password

1.9.11  No IP Connectivity Exists Between Nodes

1.9.12  DCC Connection Lost

1.9.13  "Path in Use Error" When Creating a Circuit

1.9.14  Calculate and Design IP Subnets

1.9.15  Ethernet Connections

Verify Ethernet Connections

1.9.16  VLAN Cannot Connect to Network Device from Untag Port

Change VLAN Port Tagged and Untag Settings

1.10  Circuits and Timing

1.10.1  STM-N Circuit Transitions to Partial State

View the State of Circuit Nodes

1.10.2  DS3i-N-12 Card Does Not Report MS-AIS From External Equipment

1.10.3  STM-1 and DCC Limitations

1.10.4  ONS 15454 SDH Switches Timing Reference

1.10.5  Holdover Synchronization Alarm

1.10.6  Free-Running Synchronization Mode

1.10.7  Daisy-Chained BITS Not Functioning

1.10.8  Blinking STAT LED after Installing a Card

1.10.9  Circuits Remain in PARTIAL Status

1.11  Fiber and Cabling

1.11.1  Bit Errors Appear for a Traffic Card

1.11.2  Faulty Fiber-Optic Connections

Remove GBIC or SFP Connectors

Install a GBIC with Clips

Install a GBIC with a Handle

Install an SFP

1.11.3  Optical Card Transmit and Receive Levels

1.12  Power Supply Problems

Isolate the Cause of Power Supply Problems

1.12.1  Power Consumption for Node and Cards


General Troubleshooting


This chapter provides procedures for troubleshooting the most common problems encountered when operating a Cisco ONS 15454 SDH. To troubleshoot specific ONS 15454 SDH alarms, see Chapter 2 "Alarm Troubleshooting."

Alarms can occur even in those cards that are not explicitly mentioned in the Alarm sections. When an alarm is raised, refer to its clearing procedure.

For an update on End-of-Life and End-of-Sale notices, refer to http://www.cisco.com/en/US/products/hw/optical/ps2006/prod_eol_notices_list.html.

This chapter includes the following sections on network problems:

Troubleshooting Circuit Paths with Loopbacks—Describes loopbacks and hairpin circuits, which you can use to test circuit paths through the network or logically isolate faults


Note For dense wavelength-division multiplexing (DWDM) network acceptance tests, refer to the "Perform Network Acceptance Tests" chapter in the Cisco ONS 15454 DWDM Procedure Guide For SDH network acceptance tests, refer to the "Turn Up a Network" chapter in the Cisco ONS 15454 SDH Procedure Guide.


Troubleshooting Electrical Circuit Paths With Loopbacks—Explains how to use loopback tests described in "Troubleshooting Circuit Paths with Loopbacks" to isolate trouble on electrical circuits.

Troubleshooting Optical Circuit Paths With Loopbacks—Explains how to use loopback tests described in "Troubleshooting Circuit Paths with Loopbacks" to isolate trouble on STM-N optical circuits.

Troubleshooting Ethernet Circuit Paths With Loopbacks—Explains how to use loopback tests described in the "Troubleshooting Circuit Paths with Loopbacks" to isolate trouble on G-Series or CE-Series Ethernet circuits.

Troubleshooting FC_MR Circuit Paths With Loopbacks—Explains how to use loopbacks tests described in"Troubleshooting Circuit Paths with Loopbacks" to isolate trouble on Fibre Channel (FC_MR) circuits.

The remaining sections describe symptoms, problems, and solutions that are categorized according to the following topics:

Using CTC Diagnostics—Provides procedures and guidelines for checking card LED readiness and downloading a diagnostic file for Cisco Technical Support (TAC).

Restoring the Database and Default Settings—Provides procedures for restoring software data and restoring the node to the default setup.

PC Connectivity Troubleshooting—Provides troubleshooting procedures for PC and network connectivity to the ONS 15454 SDH.

CTC Operation Troubleshooting—Provides troubleshooting procedures for Cisco Transport Controller (CTC) login or operation problems.

Circuits and Timing—Provides troubleshooting procedures for circuit creation and error reporting as well as timing reference errors and alarms.

Fiber and Cabling—Provides troubleshooting procedures for fiber and cabling connectivity errors.

Power Supply Problems—Provides troubleshooting procedures for power supply problems.

1.1  Troubleshooting Circuit Paths with Loopbacks

Use loopbacks and hairpin circuits to test newly created SDH circuits before running live traffic or to logically locate the source of a network failure. All ONS 15454 SDH electrical cards, STM-N cards, G-Series Ethernet cards, and FC_MR cards allow loopbacks and hairpin test circuits. Other cards that do not allow loopback include E-Series Ethernet, ML-Series Ethernet, and DWDM cards such as Optical Booster (OPT-BST), Optical Preamplifier (OPT-PRE), Optical Service Channel and Combiner/Splitter Module (OSC-CSM), Band Optical Add/Drop Multiplexing (AD-xB-xx.x), and Channel Optical Add/Drop Multiplexing (AD-xC-xx.x) cards. For DWDM loopback procedures, refer to the Cisco ONS 15454 DWDM Troubleshooting Guide.

To create a loopback on a port, the port must be in the Locked,maintenance Admin State and the Locked-Enabled, loopback & maintenance service state.


Caution Facility or terminal loopbacks can be service-affecting. To protect traffic, apply a lockout or Force switch to the target loopback port. Basic directions for these procedures are in the "Protection Switching, Lock Initiation, and Clearing" section. For detailed information, refer to the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide.


Note Do not use loopbacks to verify circuit switch times or traffic hits because it could exceed 60 msec. For switch times, a test set should be placed at both ends of the circuits.



Caution On STM-N cards, a facility loopback applies to the entire card and not an individual circuit. Exercise caution when using loopbacks on an STM-N card carrying live traffic.

1.1.1  Facility Loopbacks

The following sections give general information about facility loopback operations and specific information about ONS 15454 SDH card loopback activity.

1.1.1.1  General Behavior

A facility loopback tests the line interface unit (LIU) of a card, the Front Mount Electrical Connection (FMEC) card, and related cabling. After applying a facility loopback on a port, use a test set to run traffic over the loopback. A successful facility loopback isolates the LIU, the Front-Mount Electrical Card (FMEC), or the cabling plant as the potential cause of a network problem. Figure 1-1 shows a facility loopback on an E1-N card.

Figure 1-1 Facility Loopback Path on a Near-End E1-N Card

To test an optical card LIU, connect an optical test set to the optical port and perform a facility loopback. Or use a loopback or hairpin on a card that is farther along the circuit path. Figure 1-2 shows a facility loopback on an STM-N card.

Figure 1-2 Facility Loopback Process on a Near-End STM-N Card

In CTC, STM-N cards with facility loopbacks show an icon (Figure 1-3). Loopback icons are not shown on other cards in this release.

Figure 1-3 STM-N Facility Loopback Indicator


Caution Before performing a facility loopback on an optical card, be sure the card contains at least two data communications channel (DCC) paths to the node where the card is installed. A second DCC provides a nonlooped path to log into the node after the loopback is applied, enabling you to remove the facility loopback. Ensuring a second DCC is not necessary if you are directly connected to the ONS 15454 SDH containing the loopback optical card.


Note CTC sometimes refers to a facility loopback as a facility loopback. This is done to clarify the direction of the loopback signal for the user--that is, the loopback signal is sent outward toward the span and away from the facility where it originates.


1.1.1.2  ONS 15454 SDH Card Behavior

ONS 15454 SDH port loopbacks either terminate or bridge the loopback signal. All ONS 15454 SDH optical, electrical, and Ethernet facility loopbacks are terminated as shown in Table 1-1.

When a port terminates a facility loopback signal, the signal only loops back to the originating port and is not transmitted downstream. When a port bridges a loopback signal, the signal loops back to the originating port and is also transmitted downstream.


Note In Table 1-1, no alarm indication signal (AIS) signal is injected if the signal is bridged. If the signal is terminated, an AIS is injected downstream for all cards except Ethernet cards.


Table 1-1 ONS 15454 SDH Card Facility Loopback Behavior 

Card/Port
Facility Loopback Signal

DS3i-N-12

Terminated

E1-N

Terminated

G-Series Ethernet

Terminated1

C-Series Ethernet

Terminated2

STM1-E in STM1-E mode

Terminated

STM1-E ports 9-12 in E4 mode3

Terminated

1 G-Series facility loopback is terminated and no AIS is sent downstream. However, the Cisco Link Integrity signal continues to be sent downstream.

2 C-Series facility loopback is terminated and no AIS is sent downstream. However, the Cisco Link Integrity signal continues to be sent downstream.

3 For the STM1-E card, only Ports 9 through 12 can be placed in E4 mode.


The loopback itself is listed in the Conditions window. For example, the window would list the LPBKTERMINAL condition or LPBKFACILITY condition for a tested port. (The Alarms window will show AS-MT, which means that alarms are suppressed on the facility during loopback.)

In addition to the Conditions window listing, the following behaviors occur:

If an electrical or optical port is in the Locked-enabled,disabled service state, it injects an AIS signal upstream and downstream.

When an electrical or optical port is placed in the Locked-enabled,maintenance service state before loopback testing, the port clears the AIS signal upstream and downstream unless there is a service-affecting defect that would also cause an AIS signal to be injected.


Caution A lock out of protection must be executed before putting a two-fiber or four-fiber MS-SPRing span into a facility loopback state. That is, a span lockout of one side (such as the east side) of a two-fiber MS-SPRing is required before operating a facility loopback on the same (east) side of the ring. A span lockout of one protection side (such as the east protection side) of a four-fiber MS-SPRing is required before operating a facility loopback on the same (east) side working line of the ring. If you do not execute the lockout prior to creating the loopback, the ring can become stuck in an anomalous state after you release the loopback.

1.1.2  Terminal Loopbacks

The following sections give general information about terminal loopback operations and specific information about ONS 15454 SDH card loopback activity.

1.1.2.1  General Behavior

A terminal loopback tests a circuit path as it passes through the XC-VXL cross-connect card loops back from the card with the loopback. Figure 1-4 shows a terminal loopback on an STM-N card. The test-set traffic comes into the electrical card and goes through the cross-connect card to the STM-N card. The terminal loopback on the STM-N card turns the signal around before it reaches the LIU and sends it back through the cross-connect card to the E1-N card. This test verifies that the cross-connect card and terminal circuit paths are valid, but does not test the LIU on the STM-N card.

Figure 1-4 Terminal Loopback Path on an STM-N Card

In CTC, STM-N cards with terminal loopbacks show an icon (Figure 1-5). Loopback icons are not shown on other cards in this release.

Figure 1-5 Terminal Loopback Indicator

Figure 1-6 shows a terminal loopback on an E1-N electrical card. The test-set traffic comes in on the STM-N card and goes through the cross-connect card to the E1-N card. The terminal loopback on the E1-N card turns the signal around before it reaches the LIU and sends it back through the cross-connect card to the STM-N card. This test verifies that the cross-connect card and terminal circuit paths are valid, but does not test the LIU on the E1-N card.

Figure 1-6 Terminal Loopback Process on an E1-N Card


Note CTC sometimes refers to a terminal loopback as a terminal (inward) loopback. This is done to clarify the direction of the loopback signal for the user--that is, the loopback signal is sent inward to the facility where it originates.


1.1.2.2  ONS 15454 SDH Card Behavior

ONS 15454 SDH port loopbacks can either terminate or bridge the loopback signal. In the ONS 15454 SDH system, all optical, electrical, Ethernet, and FC_MR facility loopbacks are terminated as shown in Table 1-2. During terminal loopbacks, some ONS 15454 SDH cards bridge the loopback signal while others terminate it.

If a port terminates a terminal or facility loopback signal, the signal only loops back to the originating port and is not transmitted downstream. If the port bridges a loopback signal, the signal loops back to the originating port and is also transmitted downstream.

ONS 15454 SDH card terminal loopback bridging and terminating behaviors are listed in Table 1-2.


Note In Table 1-2, no AIS signal is injected if the signal is bridged. If the signal is terminated, an applicable AIS is injected downstream for all cards except Ethernet cards.


Table 1-2 ONS 15454 SDH Card Terminal Loopback Behavior

Card/Port
Terminal Loopback Signal

DS3i-N-12

Bridged

E1-N

Terminated

G-Series Ethernet

Terminated1

C-Series Ethernet

Terminated2

STM1-E in STM1-E mode

Terminated

STM1-E ports 9-12 in E4 mode3

Bridged

1 G-Series Ethernet terminal loopback is terminated and Ethernet transmission is disabled. No AIS is inserted for Ethernet, but a TPTFAIL alarm is raised on the far-end Ethernet port.

2 C-Series Ethernet terminal loopback is terminated and Ethernet transmission is disabled. No AIS is inserted for Ethernet, but a TPTFAIL alarm is raised on the far-end Ethernet port.

3 For the STM1-E card, only Ports 9 through 12 can be placed in E4 mode.


Bridged E1-N and STM-N terminal loopback examples are shown in Figure 1-7 and Figure 1-8.

Figure 1-7 Terminal Loopback on an E1-N Card with Bridged Signal

Figure 1-8 Terminal Loopback on an STM-N Card with Bridged Signal

G-Series Ethernet cards placed in terminal loopback have different performance monitoring behavior from other ONS 15454 SDH cards. (For more information about performance monitoring counters, see the Cisco ONS 15454 SDH Reference Manual.) Setting a terminal loopback on the G-Series card might not stop the Tx Packets counter or the Rx Packet counters on the CTC card-level view Performance > Statistics page from increasing. The counters can increment even though the loopbacked port has temporarily disabled the transmit laser and is dropping any received packets.

The Tx Packet statistic continues to increment because the statistic is not based on the packets transmitted by the transmit laser but on the transmit signal inside the G-Series card. In normal Unlocked-enabled port operation, the transmit signal being recorded does result in the transmit laser transmitting packets, but in a terminal loopback this signal is being looped back within the G-Series card and does not result in the transmit laser transmitting packets.

The Rx Packet counter might also continue to increment when the G-Series card is in terminal loopback. Receive (Rx) packets from any connected device are dropped and not recorded, but the internally looped back packets follow the G-Series card's normal receive path and register on the Rx Packet counter.

The loopback itself is listed in the Conditions window. For example, the window would list the LPBKTERMINAL condition or LPBKFACILITY condition for a tested port. (The Alarms window will show AS-MT, which means that alarms are suppressed on the facility during loopback.)

The following behaviors also occur during loopback:

If an electrical or optical port is in the Locked-enabled,disabled service state, the port injects an AIS signal upstream and downstream.

When an electrical or optical port is placed in the Locked-enabled,maintenance service state before loopback testing, the port clears the AIS signal upstream and downstream unless there is a service-affecting defect that also causes an AIS signal to be injected.


Caution A lock out of protection must be executed before putting a two-fiber or four-fiber MS-SPRing span into a terminal loopback state. That is, a span lockout of one side (such as the east side) of a two-fiber MS-SPRing is required before operating a facility loopback on the same (east) side of the ring. A span lockout of one protection side (such as the east protection side) of a four-fiber MS-SPRing is required before operating a terminal loopback on the same (east) side working line of the ring. If you do not execute the lockout prior to creating the loopback, the ring can become stuck in an anomalous state after you release the loopback.

1.1.3  Hairpin Circuits

A hairpin circuit brings traffic in and out on an electrical port rather than sending the traffic onto the optical card. A hairpin loops back only the specific VC3 or VC4 circuit and does not cause an entire optical port to loop back, thus preventing a drop of all traffic on the optical port. The hairpin allows you to test a specific VC circuit on nodes running live traffic. Figure 1-9 shows the hairpin circuit path on an E1-N card.

Figure 1-9 Hairpin Circuit Path on an E1-N Card

1.1.4  Cross-Connect Loopbacks

A cross-connect (XC) loopback tests an STM-N circuit path as it passes through the cross-connect card and loops back to the port being tested without affecting other traffic on the optical port. Cross-connect loopbacks are less invasive than terminal or facility loopbacks. Facility and terminal loopback testing and circuit verification often involve taking down the whole line; however, a cross-connect loopback allows you to create a loopback on any embedded channel at supported payloads of VC3 granularity and higher. For example, you can loop back a single STM-1, STM-4, STM-16, etc. on an optical facility without interrupting the other synchronous transport signal (STS) circuits.

This test can be conducted locally or remotely through the CTC interface without on-site personnel. It takes place only on an STM-N card and tests the traffic path on that VC (or higher) circuit through the port and cross-connect card. The signal path is similar to a facility loopback.

The XC loopback breaks down the existing path and creates a new cross-connect—a hairpin—while the source of the original path is set to inject a line-side "MS-AIS" condition, page 2-190. The loopback signal path and AIS injection are shown in Figure 1-10.

Figure 1-10 NE with SDH Cross-Connect Loopback Function

When creating cross-connect loopbacks, consult the following rules:

You can create a cross-connect loopback on all working or protect optical ports unless the protect port is used in a 1+1 protection group and is in working mode.

If a terminal or facility loopback exists on a port, you cannot use the cross-connect loopback.

1.2  Troubleshooting Electrical Circuit Paths With Loopbacks

Facility loopbacks, terminal loopbacks, and hairpin circuits are often used to test a circuit path through the network or to logically isolate a fault. Performing a loopback test at each point along the circuit path systematically isolates possible points of failure. These procedures apply to DS-3 and E-1 electrical cards.

The example in this section tests an electrical circuit on a two-node multiplex section-shared protection ring (MS-SPRing). Using a series of facility loopbacks, terminal loopbacks, hairpins, and where appropriate cross-connect loopbacks (on optical paths carrying electrical circuits), the path of the circuit is traced and the possible points of failure are tested and eliminated. A logical progression of five network test procedures applies to this sample scenario:


Note The test sequence for your circuits will differ according to the type of circuit and network topology.


West to east direction (left to right):

1. A facility loopback on the source-node electrical card (DS-3 or E-1)

2. A hairpin on the source-node electrical port

3. An XC loopback on the destination-node STM-N virtual concatenation (VC, carrying the electrical circuit)

4. A terminal loopback on the destination-node electrical port

East to west direction (right to left):

1. A facility loopback on the destination-node electrical port

2. A hairpin on the destination-node electrical port

3. An XC loopback on the source-node STM-N VC (carrying the electrical circuit)

4. A terminal loopback on the source-node electrical port


Note Facility, hairpin, and terminal loopback tests require on-site personnel.


1.2.1  Perform a Facility Loopback on a Source Electrical Port (West to East)

The facility loopback test is performed on the node source port in the network circuit; in this example, the E1-N port is the source. Completing a successful facility loopback on this port isolates the cabling, the electrical card, and the FMEC card as possible failure points. Figure 1-11 shows an example of a facility loopback on a source E1-N port.

Figure 1-11 Facility Loopback on a Circuit Source E1-N Port


Caution Performing a loopback on an Unlocked circuit is service-affecting. To protect traffic, apply a lockout or Force switch to the target loopback port. For detailed information, refer to the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide.


Note Electrical facility loopbacks do not transmit an AIS condition in the direction away from the loopback. Instead of an AIS, a continuance of the signal transmitted to the loopback is provided.


Complete the "Create the Facility Loopback on the Source Electrical Port" procedure, then test and clear the loopback as instructed.

Create the Facility Loopback on the Source Electrical Port


Step 1 Connect an electrical test set to the port you are testing. (For instructions to use the test set, consult the manufacturer.)

Step 2 Use appropriate cabling to attach the transmit and receive terminals of the electrical test set to the FMEC connectors or electrical connection panel for the port you are testing. The transmit and receive terminals connect to the same port.

Step 3 Adjust the test set accordingly.

Step 4 In node view, double-click the card to display the card view.

Step 5 Click the Maintenance > Loopback tab.

Step 6 Choose Unlocked,maintenance from the Admin State column for the port being tested.

Step 7 Choose Facility from the Loopback Type column for the port being tested. If this is a multiport card, select the appropriate row for the port being tested.

Step 8 Click Apply.

Step 9 Click Yes in the confirmation dialog box.


Note It is normal for the "LPBKFACILITY (DS1, DS3)" condition on page 2-167 to appear during loopback setup. The condition clears when you remove the loopback.


Step 10 Complete the "Test and Clear the Electrical Port Facility Loopback Circuit" procedure.


Test and Clear the Electrical Port Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Double-click the card to display the card view.

Step 4 Depending upon the card type, click the Maintenance > Loopback tab.

Step 5 Choose None from the Loopback Type column for the port being tested.

Step 6 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.

Step 9 Complete the "Test the Electrical Cabling" procedure.


Test the Electrical Cabling


Step 1 Replace the suspected bad cabling (the cables from the test set to the electrical connection panel or the FMEC card ports) with a known-good cable.

If a known-good cable is not available, test the suspected bad cable with a test set. Remove the suspected bad cable from the electrical connection panel or the FMEC card and connect the cable to the transmit and receive terminals of the test set. Run traffic to determine whether the cable is good or defective.

Step 2 Replace the defective cable.

Step 3 Click the Maintenance > Loopback tabs.


Note The DS-3 Admin State is the basis of the DS-1 Derived State.


Step 4 Choose None from the Loopback Type column for the port being tested.

Step 5 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 6 Click Apply.

Step 7 Click Yes in the confirmation dialog box.

Step 8 Complete the "Test the Electrical Card" procedure.


Test the Electrical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco Technical Assistance Center (TAC) numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 In card view for the electrical card, double-click the Maintenance > Loopback tabs.


Note The DS-3 Admin State is the basis of the DS-1 Derived State.


Step 6 Choose None from the Loopback Type column for the port being tested.

Step 7 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 8 Click Apply.

Step 9 Click Yes in the confirmation dialog box.

Step 10 Complete the "Test the FMEC" procedure.


Test the FMEC


Step 1 Remove and reinstall the FMEC card to ensure a proper seating:

a. Unscrew the screws on the FMEC cover and pull the cover forward.

b. Loosen the faceplate screws that hold the FMEC card in place.

c. Pull the FMEC card outward by the faceplate to unseat it from the shelf assembly.

d. Push the FMEC card back inward by the faceplate to reseat it in the shelf assembly.

Step 2 Resend test traffic on the loopback circuit with known-good cabling, a known-good card, and the reinstalled FMEC.

Step 3 If the test set indicates a good circuit, the problem is probably an improperly seated FMEC. Click the Maintenance > Loopback tabs.

Step 4 Choose None from the Loopback Type column for the port being tested.

Step 5 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 6 Click Apply.

Step 7 Click Yes in the confirmation dialog box. Continue with Step 17.

Step 8 If the test set indicates a faulty circuit, the problem is probably a defective FMEC card. Return the defective FMEC card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 9 Remove the faulty FMEC and replace it:

a. Unscrew the screws on the FMEC cover and pull the cover forward.

b. Loosen the faceplate screws that hold the FMEC card in place.

c. Pull the FMEC card outward by the faceplate to unseat it from the shelf assembly.

d. Push the FMEC card back inward by the faceplate to reseat it in the shelf assembly.

Step 10 Resend test traffic on the loopback circuit with known-good cabling, a known-good card, and the replacement FMEC card.

Step 11 If the test set indicates a faulty circuit, repeat all of the facility loopback procedures.

Step 12 If the test set indicates a good circuit, the problem is probably the defective FMEC card. Click the Maintenance > Loopback tabs.

Step 13 Choose None from the Loopback Type column for the port being tested.

Step 14 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 15 Click Apply.

Step 16 Click Yes in the confirmation dialog box.

Step 17 Complete the "1.2.2  Perform a Hairpin Test on a Source-Node Electrical Port (West to East)" procedure.


1.2.2  Perform a Hairpin Test on a Source-Node Electrical Port (West to East)

The hairpin test is performed on the XC-VXL cross-connect card in the network circuit. A hairpin circuit uses the same port for both source and destination. Completing a successful hairpin through the card isolates the possibility that the cross-connect card is the cause of the faulty circuit. Figure 1-12 shows an example of a hairpin loopback on a source-node port.

Figure 1-12 Hairpin on a Source-Node Port


Note The ONS 15454 SDH does not support simplex operation on the XC-VXL cross-connect card. Two cross-connect cards of the same type must be installed for each node.


Complete the "Create the Hairpin Circuit on the Source-Node Electrical Port" procedure.

Create the Hairpin Circuit on the Source-Node Electrical Port


Step 1 Connect an electrical test set to the port you are testing:

a. If you just completed the "1.2.1  Perform a Facility Loopback on a Source Electrical Port (West to East)" procedure, leave the electrical test set hooked up to the source-node electrical port.

b. If you are starting the current procedure without the electrical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the electrical test set to the electrical connection panel or the FMEC card connectors for the port you are testing. The transmit and receive terminals connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the hairpin circuit on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as VC HO Path Circuit and number of circuits, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as Hairpin1.

e. Choose the Size, such as VC4.

f. Uncheck the Bidirectional check box. Leave the default value for State, SD Threshold, and SF Threshold.

g. Click Next.

h. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits. Leave Use Secondary Source unchecked.

i. Click Next.

j. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the Circuit Source dialog box. Leave Use Secondary Destination unchecked.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box is displayed, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it as a one-way circuit.

Step 5 Complete the "Test and Delete the Electrical Port Hairpin Circuit" procedure.


Test and Delete the Electrical Port Hairpin Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the hairpin circuit. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 4 Complete the "Test the Standby XC-VXL Cross-Connect Card" procedure.


Test the Standby XC-VXL Cross-Connect Card


Note Two XC-VXL cross-connect cards (active and standby) must be in use on a node to use this procedure.



Step 1 Perform a reset on the standby cross-connect card to make it the active card:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. Position the cursor over the standby cross-connect card.

c. Right-click and choose RESET CARD.

d. Click Yes in the confirmation dialog box.

Step 2 Initiate an external switching command (side switch) on the cross-connect cards before you retest the loopback circuit:


Caution Cross-connect side switches are service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms.

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In the node view, select the Maintenance > Cross Connect > Cards tabs.

c. In the Cross Connect Cards menu, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 3 Resend test traffic on the loopback circuit.

The test traffic now travels through the alternate cross-connect card.

Step 4 If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 5 To confirm a defective original cross-connect card, complete the "Retest the Original XC-VXL Cross-Connect Card" procedure.


Retest the Original XC-VXL Cross-Connect Card


Step 1 Initiate an external switching command (side switch) on the cross-connect cards:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active cross-connect ACT/STBY LED is green.

b. In node view, select the Maintenance > Cross Connect > Cards tabs.

c. From the Cross Connect Cards menu, choose Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 2 Resend test traffic on the loopback circuit.

Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace an In-Service Cross-Connect Card" procedure for the defective card.

Step 5 Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 6 Complete the "1.2.3  Perform an XC Loopback on a Destination-Node STM-N VC (West to East) Carrying an Electrical Signal" procedure.


1.2.3  Perform an XC Loopback on a Destination-Node STM-N VC (West to East) Carrying an Electrical Signal

The XC loopback tests whether any problem exists on the circuit's optical span, isolating this span from others present on the card. The loopback occurs on the XC-VXL cross-connect card in a network circuit. Figure 1-13 shows an example of an XC loopback on a destination optical port. The traffic pattern looks similar to a terminal loopback but traffic is only carried on one synchronous transport signal (STS) instead of affecting the entire port.


Note The XC loopback on an optical card does not affect traffic on other circuits.



Note You can perform an XC loopback on either the circuit source working or the protect port of a 1+1 protection group.


Figure 1-13 XC Loopback on a Destination STM-N Port


Step 1 Connect an optical test set to the port you are testing:


Note For specific procedures to connect, set up, and use the test set equipment, consult the manufacturer.


a. If you just completed the "1.2.2  Perform a Hairpin Test on a Source-Node Electrical Port (West to East)" procedure, leave the optical test set hooked up to the destination-node port.

b. If you are starting the current procedure without the optical test set hooked up to the destination port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. The transmit and receive terminals connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to put the circuit being tested out of service:

a. In node view, click the Circuits tab.

b. Click the circuit and then click Edit.

c. In the Edit Circuit dialog box, click the State tab.

d. Choose Locked,maintenance from the Target Circuit State drop-down list.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Use CTC to set up the XC loopback on the circuit being tested:

a. In node view, double-click the optical card to display the card view.

b. Click the Maintenance > Loopback > VC4 tabs.

c. Check the check box in the XC Loopback column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 5 Complete the "Test and Clear the XC Loopback Circuit" procedure.


Test and Clear the XC Loopback Circuit


Note This procedure is performed only on STM-N cards.



Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the cross-connect. Clear the XC loopback:

a. In card view, click the Maintenance > Loopback > VC4 tabs.

b. Uncheck the check box in the XC Loopback column for the circuit being tested.

c. Click Apply.

d. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the Standby XC-VXC-10G Cross-Connect Card" procedure.


Test the Standby XC-VXC-10G Cross-Connect Card


Step 1 Perform a reset on the standby cross-connect card:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. Position the cursor over the standby cross-connect card.

c. Right-click and choose RESET CARD.

d. Click Yes in the confirmation dialog box.

Step 2 Initiate an external switching command (side switch) on the cross-connect cards before you retest the loopback circuit:


Caution Cross-connect side switches are service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms.

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In the node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 3 Resend test traffic on the loopback circuit.

The test traffic now travels through the alternate cross-connect card.

Step 4 If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear the XC loopback circuit:

a. Click the Circuits tab.

b. Choose the XC loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the XC loopback circuit is deleted form the Circuits tab list. If the test set indicates a good circuit, the problem might be a defective cross-connect card.

Step 5 To confirm a defective original cross-connect card, complete the "Retest the Original XC-VXC-10G Cross-Connect Card" procedure.


Retest the Original XC-VXC-10G Cross-Connect Card


Note This procedure is performed only on STM-N and XC-VXL cards.



Step 1 Initiate an external switching command (side switch) on the cross-connect cards:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 2 Resend test traffic on the loopback circuit.

Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Proceed to Step 5. If the circuit is not shown to be faulty and the card is not shown to be defective, you are finished with testing.

Step 5 Complete the "Physically Replace an In-Service Cross-Connect Card" procedure for the defective cross-connect card and perform Step 6.

Step 6 If the test set indicates a good circuit, the cross-connect card might have had a temporary problem that was cleared by the side switch. Clear the XC loopback circuit:

a. Click the Circuits tab.

b. Choose the XC loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 If the tests indicate further problems, go to the "1.2.4  Perform a Terminal Loopback on a Destination Electrical Port (West to East)" procedure.


1.2.4  Perform a Terminal Loopback on a Destination Electrical Port (West to East)

The terminal loopback test is performed on the node destination port in the circuit, such as a destination-node electrical port. You first create a bidirectional circuit that starts on the source-node port and loops back on the destination-node electrical port. Then you proceed with the terminal loopback test. Completing a successful terminal loopback to a destination-node electrical port verifies that the circuit is good up to the destination port. Figure 1-14 shows an example of a terminal loopback on a destination E3-12 port.

Figure 1-14 Terminal Loopback on a Destination E3-12 Port


Caution Performing a loopback on an Unlocked circuit is service-affecting. To protect traffic, apply a lockout or Force switch to the target loopback port. For detailed information, refer to the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide.


Caution In terminal loopback mode, DS3E-12 card does not support sending AIS toward the line side while looping back traffic at the same time, though NE defaults are the same.


Note Electrical circuit terminal loopbacks do not transmit an AIS condition in the direction away from the loopback. Instead of an AIS, a continuance of the signal transmitted to the loopback is provided.


Complete the "Create the Terminal Loopback on a Destination Electrical Port" procedure, then test and clear the loopback as instructed.

Create the Terminal Loopback on a Destination Electrical Port


Step 1 Connect an electrical test set to the port you are testing:

a. If you just completed the "1.2.3  Perform an XC Loopback on a Destination-Node STM-N VC (West to East) Carrying an Electrical Signal" procedure, leave the electrical test set hooked up to the source-node port.

b. If you are starting the current procedure without the electrical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the electrical test set to the electrical connection panel or the FMEC card connectors for the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 In CTC node view, click the Circuits tab and click Create.

Step 4 In the Circuit Creation dialog box, choose the type and size, such as such as VC HO Path Circuit, and number, such as 1.

Step 5 Click Next.

Step 6 In the next Circuit Creation dialog box, give the circuit an easily identifiable name, such as ENtoEN.

Step 7 Leave the Bidirectional check box checked. Leave the default value for State.

Step 8 Click Next.

Step 9 In the Circuit Creation source dialog box, select the Node, Slot, Port, and VC4 where the test set is connected.

Step 10 Click Next.

Step 11 In the Circuit Creation destination dialog box, fill in the same Node, Slot, Port, and VC4 (the destination-node port) and click Finish.

Step 12 Confirm that the newly created circuit appears in the Circuits tab Dir column as a two-way circuit.


Note It is normal for a "LPBKTERMINAL (DS1, DS3)" condition, page 2-171 to appear during a loopback setup. The condition clears when you remove the loopback.



Note Electrical circuit terminal loopbacks do not transmit an AIS (see the "AIS" condition on page 2-37) in the direction away from the loopback. Instead of an AIS, a continuance of the signal transmitted to the loopback is provided.


Step 13 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the destination node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback, such as an E-1 card in the destination node.

c. Click the Maintenance > Loopback tabs.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 14 Complete the "Test and Clear the Destination Electrical Port Terminal Loopback Circuit" procedure.


Test and Clear the Destination Electrical Port Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Double-click the electrical card in the destination node with the terminal loopback.

Step 4 Click the Maintenance > Loopback tabs.

Step 5 Select None from the Loopback Type column for the port being tested.

Step 6 Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.

Step 9 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 10 Complete the "Test the Destination Electrical Card" procedure.


Test the Destination Electrical Card


Step 1 Replace the suspected bad card with a known-good card. Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card.

a. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

b. Complete "Physically Replace a Traffic Card" procedure for the faulty card.

Step 4 Clear the terminal loopback state on the port:

a. Double-click the destination-node electrical card.

b. Click the Maintenance > Loopback tabs.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 5 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 6 Complete the "1.2.5  Perform a Facility Loopback on a Destination-Node Electrical Port (East to West)" procedure.


1.2.5  Perform a Facility Loopback on a Destination-Node Electrical Port (East to West)

The facility loopback test is performed on the destination-node electrical port in the network circuit. Completing a successful facility loopback on this port isolates the possibility that the destination-node cabling, electrical card, LIU, or FMEC card is responsible for a faulty circuit. Figure 1-15 shows an example of a facility loopback on a destination E1-N port.

Figure 1-15 Facility Loopback on a Destination E1-N Port


Note Electrical circuit facility loopbacks do not transmit an AIS condition in the direction away from the loopback. Instead of an AIS, a continuance of the signal transmitted to the loopback is provided.



Caution Performing a loopback on an Unlocked circuit is service-affecting. To protect traffic, apply a lockout or Force switch to the target loopback port. For basic instructions, see the "Protection Switching, Lock Initiation, and Clearing" section. For detailed information, refer to the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide.

Complete the "Create a Facility Loopback Circuit on a Destination Electrical Port" procedure. Then test and clear the loopback as instructed.

Create a Facility Loopback Circuit on a Destination Electrical Port


Step 1 Connect an electrical test set to the port you are testing.

a. If you just completed the "1.2.4  Perform a Terminal Loopback on a Destination Electrical Port (West to East)" procedure, leave the electrical test set hooked up to the destination-node port.

b. If you are starting the current procedure without the electrical test set hooked up to the destination port, use appropriate cabling to attach the transmit and receive terminals of the electrical test set to the electrical connection panel or the FMEC connectors for the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 In node view, double-click the destination electrical card to display the card view.

Step 4 Click the Maintenance > Loopback tabs.

Step 5 Choose Locked,maintenance from the Admin State column.

Step 6 Select Facility from the Loopback Type column for the port being tested. If this is a multiport card, select the row appropriate for the desired port.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.


Note It is normal for a "LPBKFACILITY (DS1, DS3)" condition, page 2-167 or "LPBKFACILITY (E1, E3, E4)" condition, page 2-168 to appear during loopback setup. The condition clears when you remove the loopback.


Step 9 Complete the "Test and Clear the Facility Loopback Electrical Circuit" procedure.


Test and Clear the Facility Loopback Electrical Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the loopback circuit. Double-click the card to display the card view.

Step 4 Click the Maintenance > Loopback tabs.

Step 5 Choose None from the Loopback Type column for the port being tested.

Step 6 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.

Step 9 If the test set indicates a faulty circuit, the problem might be a faulty electrical card, faulty cabling from the electrical card to the connection panel or the FMECs. Complete the "Test the Electrical Cabling" procedure.


Test the Electrical Cabling


Step 1 Replace the suspect cabling (the cables from the test set to the electrical connection panel or the FMEC card ports) with a known-good cable.

If a known-good cable is not available, test the suspected bad cable with a test set. Remove the suspected bad cable from the electrical connection panel or the FMEC card and connect the cable to the transmit and receive terminals of the test set. Run traffic to determine whether the cable is good or defective.

Step 2 Resend test traffic on the loopback circuit with a known-good cable installed.

Step 3 If the test set indicates a good circuit, the problem was probably the defective cable. Replace the defective cable.

Step 4 Double-click the card to display the card view.

Step 5 Click the Maintenance > Loopback tabs.

Step 6 Choose None from the Loopback Type column for the port being tested.

Step 7 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 8 Click Apply.

Step 9 Click Yes in the confirmation dialog box.

Step 10 Complete the "Test the Electrical Card" procedure.


Test the Electrical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Replace the faulty card. Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Double-click the card to display the card view.

Step 6 Click the Maintenance > Loopback tabs.

Step 7 Choose None from the Loopback Type column for the port being tested.

Step 8 Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

Step 9 Click Apply.

Step 10 Click Yes in the confirmation dialog box.

Step 11 Complete the "Test the FMEC" procedure.


Test the FMEC


Step 1 Remove and reinstall the FMEC card to ensure a proper seating:

a. Unscrew the screws on the FMEC cover and pull the cover forward.

b. Loosen the faceplate screws that hold the FMEC card in place.

c. Pull the FMEC card outward by the faceplate to unseat it from the shelf assembly.

d. Push the FMEC card back inward by the faceplate to reseat it in the shelf assembly.

Step 2 Resend test traffic on the loopback circuit with known-good cabling, a known-good card, and the reinstalled FMEC card. If the test set indicates a good circuit, the problem is probably an improperly seated FMEC card.

Step 3 Clear the facility loopback:

a. Click the Maintenance > Loopback tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

The entire electrical circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live traffic.

Step 4 If the test set indicates a faulty circuit, the problem is probably the defective FMEC card. Return the defective FMEC card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 5 Complete the "Physically Replace a Traffic Card" procedure for the faulty FMEC card.

Step 6 Resend test traffic on the loopback circuit with known-good cabling, a known-good card, and the replacement FMEC card.

Step 7 If the test set indicates a faulty circuit, repeat all of the facility loopback procedures. If the faulty circuit persists, contact the Cisco Technical Support. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 8 If the test set indicates a good circuit, the problem is probably a defective FMEC card. Clear the facility loopback:

a. Click the Maintenance > Loopback tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 9 Complete the "1.2.6  Perform a Hairpin Test on a Destination-Node Electrical Port (East to West)" procedure.


1.2.6  Perform a Hairpin Test on a Destination-Node Electrical Port (East to West)

The hairpin test is performed on the cross-connect card in the network circuit. A hairpin circuit uses the same port for both source and destination. Completing a successful hairpin through the card isolates the possibility that the cross-connect card is the cause of the faulty circuit. Figure 1-16 shows an example of a hairpin loopback on a destination-node port.

Figure 1-16 Hairpin on a Destination-Node Port


Note The ONS 15454 SDH does not support simplex operation on the XC-VXL cross-connect card. Two cross-connect cards of the same type must be installed for each node.


Complete the "Create the Hairpin Circuit on the Destination-Node Port" procedure.

Create the Hairpin Circuit on the Destination-Node Port


Step 1 Connect an electrical test set to the port you are testing:

a. If you just completed the "1.2.5  Perform a Facility Loopback on a Destination-Node Electrical Port (East to West)" procedure, leave the electrical test set hooked up to the electrical port in the destination node.

b. If you are starting the current procedure without the electrical test set hooked up to the electrical port, use appropriate cabling to attach the transmit and receive terminals of the electrical test set to the electrical connection panel or the FMEC connectors for the port you are testing. The transmit and receive terminals connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the hairpin circuit on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as VC HO Path Circuit, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as Hairpin1.

e. Uncheck the Bidirectional check box. Leave the default value for State, SD Threshold, and SF Threshold.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits. Leave Use Secondary Source unchecked.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box. Leave Use Secondary Destination unchecked.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box appears, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it as a one-way circuit.

Step 5 Complete the "Test and Delete the Electrical Hairpin Circuit" procedure.


Test and Delete the Electrical Hairpin Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the hairpin circuit. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits box.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 4 Complete the "Test the Standby XC-VXL Cross-Connect Card" procedure.


Test the Standby XC-VXL Cross-Connect Card


Note Two XC-VXL cross-connect cards (active and standby) must be in use on a node to use this procedure.



Step 1 Perform a reset on the standby XC-VXL cross-connect card to make it the active card:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. Position the cursor over the standby cross-connect card.

c. Right-click and choose RESET CARD.

d. Click Yes in the confirmation dialog box.

Step 2 Initiate an external switching command (side switch) on the cross-connect cards before you retest the loopback circuit:


Caution Cross-connect side switches are service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms.

a. Determine the standby XC-VXL cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In the node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active XC-VXL cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 3 Resend test traffic on the loopback circuit.

The test traffic now travels through the alternate cross-connect card.

Step 4 If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 5 To confirm a defective original cross-connect card, complete the "Retest the Original XC-VXL Cross-Connect Card" procedure.


Retest the Original XC-VXL Cross-Connect Card


Step 1 Initiate an external switching command (side switch) on the XC-VXL cross-connect cards:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In node view, select the Maintenance > Cross-Connect > Card tabs.

c. From the Cross-Connect Cards menu, choose Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 2 Resend test traffic on the loopback circuit.

Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Proceed to Step 5. If the test does not indicate a faulty circuit, proceed to Step 6.

Step 5 Complete the "Physically Replace an In-Service Cross-Connect Card" procedure for the defective cross-connect card.

Step 6 If the test set indicates a good circuit, the cross-connect card might have had a temporary problem that was cleared by the side switch. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 7 Complete the "1.2.7  Perform an XC Loopback on a Source-Node STM-N VC (East to West) Carrying an Electrical Circuit" procedure.


1.2.7  Perform an XC Loopback on a Source-Node STM-N VC (East to West) Carrying an Electrical Circuit

The XC loopback tests whether any problem exists on the circuit's optical span, isolating this span from others present on the card. It also eliminates the cross-connect card as the source of trouble for a faulty circuit. The loopback occurs on the XC-VXL cross-connect card in a network circuit. Figure 1-17 shows an example of an XC loopback on a source STM-N port.


Note The XC loopback on an STM-N card does not affect traffic on other circuits.



Note You can perform an XC loopback on either the circuit source working or the protect port of a 1+1 protection group.


Figure 1-17 XC Loopback on a Source STM-N Port

Complete the "Create the XC Loopback on the Source Optical Port Carrying an Electrical Circuit" procedure.

Create the XC Loopback on the Source Optical Port Carrying an Electrical Circuit


Step 1 Connect an optical test set to the port you are testing:


Note For specific procedures to connect, set up, and use the test set equipment, consult the manufacturer.


a. If you just completed the "1.2.6  Perform a Hairpin Test on a Destination-Node Electrical Port (East to West)" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. The transmit and receive terminals connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to put the circuit being tested out of service:

a. In node view, click the Circuits tab.

b. Click the circuit and then click Edit.

c. In the Edit Circuit dialog box, click the State tab.

d. Choose Locked,maintenance from the Target Circuit State drop-down list.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Use CTC to set up the XC loopback on the circuit being tested:

a. In node view, double-click the optical card to display the card view.

b. Click the Maintenance > Loopback > VC4 tabs.

c. Click the XC Loopback column check box for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 5 Complete the "Test and Clear the XC Loopback Circuit" procedure.


Test and Clear the XC Loopback Circuit


Note This procedure is performed only on STM-N cards.



Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the cross-connect. Clear the XC loopback:

a. In card view, click the Maintenance > Loopback > VC4 tabs.

b. Uncheck the check box in the XC Loopback column for the circuit being tested.

c. Click Apply.

d. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the Standby XC-VXL Cross-Connect Card" procedure.


Test the Standby XC-VXL Cross-Connect Card


Step 1 Perform a reset on the standby cross-connect card:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. Position the cursor over the standby cross-connect card.

c. Right-click and choose RESET CARD.

d. Click Yes in the confirmation dialog box.

Step 2 Initiate an external switching command (side switch) on the cross-connect cards before you retest the loopback circuit:


Caution Cross-connect side switches are service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms.

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In the node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 3 Resend test traffic on the loopback circuit.

The test traffic now travels through the alternate cross-connect card.

Step 4 If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear the XC loopback circuit:

a. Click the Circuits tab.

b. Choose the XC loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the XC loopback circuit is deleted form the Circuits tab list. If the test set indicates a good circuit, the problem might be a defective cross-connect card.

Step 5 To confirm a defective original cross-connect card, complete the "Retest the Original XC-VXL Cross-Connect Card" procedure.


Retest the Original XC-VXL Cross-Connect Card


Note This procedure is performed only on STM-N and XC-VXL cards.



Step 1 Initiate an external switching command (side switch) on the cross-connect cards:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 2 Resend test traffic on the loopback circuit.

Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 If the circuit is not shown to be faulty and the card is not shown to be defective, you are finished with testing.

Step 5 Complete the "Physically Replace an In-Service Cross-Connect Card" procedure for the defective cross-connect card and perform Step 6.

Step 6 If the test set indicates a good circuit, the cross-connect card might have had a temporary problem that was cleared by the side switch. Clear the XC loopback circuit:

a. Click the Circuits tab.

b. Choose the XC loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 If the problem is not resolved, go to the "1.2.8  Perform a Terminal Loopback on a Source-Node Electrical Port (East to West)" procedure.


1.2.8  Perform a Terminal Loopback on a Source-Node Electrical Port (East to West)

The terminal loopback test is performed on the node source port in the circuit, such as a source-node electrical port. You first create a bidirectional circuit that starts on the destination-node electrical port and loops back on the source-node electrical port. Then you proceed with the terminal loopback test. Completing a successful terminal loopback to a source-node port verifies that the circuit is good to the source electrical port. Figure 1-14 shows an example of a terminal loopback on a source electrical port.

Figure 1-18 Terminal Loopback on a Source Electrical Port


Caution Performing a loopback on an Unlocked circuit is service-affecting. To protect traffic, apply a lockout or Force switch to the target loopback port. See the "Protection Switching, Lock Initiation, and Clearing" section for basic instructions. For detailed information, refer to the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide.


Caution In terminal loopback mode, DS3E-12 card does not support sending AIS toward the line side while looping back traffic at the same time, though NE defaults are the same.


Note Electrical circuit terminal loopbacks do not transmit an AIS condition in the direction away from the loopback. Instead of an AIS, a continuance of the signal transmitted to the loopback is provided.


Complete the "Create the Terminal Loopback on a Source-Node Electrical Port" procedure.

Create the Terminal Loopback on a Source-Node Electrical Port


Step 1 Connect an electrical test set to the port you are testing:

a. If you just completed the "1.2.7  Perform an XC Loopback on a Source-Node STM-N VC (East to West) Carrying an Electrical Circuit" procedure, leave the electrical test set hooked up to the electrical port in the source node.

b. If you are starting the current procedure without the electrical test set hooked up to the electrical port, use appropriate cabling to attach the transmit and receive terminals of the electrical test set to the electrical panel or the FMEC connectors for the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 In CTC node view, click the Circuits tab and click Create.

Step 4 In the Circuit Creation dialog box, choose the type and size, such as VC HO Path Circuit, and the number, such as 1.

Step 5 Click Next.

Step 6 In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as ENtoEN.

Step 7 Leave the Bidirectional check box checked.

Step 8 Click Next.

Step 9 In the Circuit Creation source dialog box, select the Node, Slot, Port, and VC4 where the test set is connected.

Step 10 Click Next.

Step 11 In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

Step 12 Click Next and complete the following substeps:

a. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

b. In the VC Optimization dialog box, leave all defaults.

c. Click Finish.

Step 13 Confirm that the newly created circuit appears in the Dir column as a two-way circuit.


Note It is normal for a "LPBKTERMINAL (DS1, DS3)" condition on page 2-171 to appear during a loopback setup. The condition clears when you remove the loopback.



Note Electrical circuit terminal loopbacks do not transmit an AIS (see the "AIS" condition on page 2-37) in the direction away from the loopback. Instead of a, electrical line AIS, a continuance of the signal transmitted to the loopback is provided.


Step 14 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the destination node:

From the View menu choose Go To Other Node.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback, such as the electrical card in the destination node.

c. Click the Maintenance > Loopback tabs.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 15 Complete the "Test and Clear the Electrical Port Terminal Loopback Circuit" procedure.


Test and Clear the Electrical Port Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Double-click the electrical card in the destination node with the terminal loopback.

Step 4 Click the Maintenance > Loopback tabs.

Step 5 Select None from the Loopback Type column for the port being tested.

Step 6 Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.

Step 9 Clear the terminal loopback:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 10 Complete the "Test the Source Electrical Card" procedure.


Test the Source Electrical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective electrical card.

Step 5 Clear the terminal loopback state on the port:

a. Double-click the electrical card in the destination node with the terminal loopback.

b. Click the Maintenance > Loopback tabs.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Delete the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

The circuit qualifies to carry traffic.


1.3  Troubleshooting Optical Circuit Paths With Loopbacks

Facility loopbacks, terminal loopbacks, and cross-connect loopback circuits are often used together to test the circuit path through the network or to logically isolate a fault. Performing a loopback test at each point along the circuit path systematically isolates possible points of failure.

The procedures in this section apply to optical cards. (For instructions on G-Series Ethernet cards, go to the "Troubleshooting Ethernet Circuit Paths With Loopbacks" section). The example in this section tests an optical circuit on a three-node MS-SPRing. Using a series of facility, cross-connect, and terminal loopbacks, the example scenario traces the circuit path, tests the possible failure points, and eliminates them. The logical progression contains seven network test procedures:


Note The test sequence for your circuits will differ according to the type of circuit and network topology.


1. A facility loopback on the source-node STM-N port

2. A terminal loopback on the source-node STM-N port

3. A cross-connect loopback on the source STM-N port

4. A facility loopback on the intermediate-node STM-N port

5. A terminal loopback on the intermediate-node STM-N port

6. A facility loopback on the destination-node STM-N port

7. A terminal loopback on the destination-node STM-N port


Note Facility, hairpin, and terminal loopback tests require on-site personnel.


1.3.1  Perform a Facility Loopback on a Source-Node Optical Port

The facility loopback test is performed on the node source port in the network circuit. In the testing situation used in this example, the source STM-N port in the source node. Completing a successful facility loopback on this port isolates the optical port as a possible failure point. Figure 1-19 shows an example of a facility loopback on a circuit source STM-N port.

Figure 1-19 Facility Loopback on a Circuit Source STM-N Port


Caution Performing a loopback on an Unlocked circuit is service-affecting.

Complete the "Create the Facility Loopback on the Source Optical Port" procedure.

Create the Facility Loopback on the Source Optical Port


Step 1 Connect an optical test set to the port you are testing.


Note For specific procedures to connect, set up, and use the test set equipment, consult the manufacturer.


Use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. The transmit and receive terminals connect to the same port. Adjust the test set accordingly.

Step 2 In CTC node view, double-click the card to display the card view.

Step 3 Click the Maintenance > Loopback > Port tabs.

Step 4 Choose Locked,maintenance from the Admin State column for the port being tested. If this is a multiport card, select the appropriate row for the desired port.

Step 5 Choose Facility from the Loopback Type column for the port being tested. If this is a multiport card, select the appropriate row for the desired port.

Step 6 Click Apply.

Step 7 Click Yes in the confirmation dialog box.


Note It is normal for a "LPBKFACILITY (STM1E, STMN)" condition, page 2-170 to appear during loopback setup. The condition clears when you remove the loopback.


Step 8 Complete the "Test and Clear the Facility Circuit" procedure.


Test and Clear the Facility Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback:

a. Click the Maintenance > Loopback > Port tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the Optical Card" procedure.


Test the Optical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback:

a. Click the Maintenance > Loopback > Port tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Complete the "1.3.2  Perform a Terminal Loopback on a Source-Node Optical Port" procedure.


1.3.2  Perform a Terminal Loopback on a Source-Node Optical Port

The terminal loopback test is performed on the source-node optical port. For the circuit in this example, the destination STM-N port in the source node. You first create a bidirectional circuit that starts on the node source optical port and loops back on the node destination optical port. You then proceed with the terminal loopback test. Completing a successful terminal loopback to a node destination port verifies that the circuit is good up to the destination port. Figure 1-20 shows an example of a terminal loopback on a source-node STM-N port.

Figure 1-20 Terminal Loopback on a Source-Node STM-N Port

STM-N cards placed in terminal loopback state display an icon in the CTC graphical user interface (GUI), shown in Figure 1-21.

Figure 1-21 Terminal Loopback Indicator


Caution Performing a loopback on an Unlocked circuit is service-affecting.

Complete the "Create the Terminal Loopback on a Source-Node Optical Port" procedure.

Create the Terminal Loopback on a Source-Node Optical Port


Step 1 Connect an optical test set to the port you are testing:


Note For specific procedures to connect, set up, and use the test set equipment, consult the manufacturer.


a. If you just completed the "1.3.1  Perform a Facility Loopback on a Source-Node Optical Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source-node port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the terminal loopback circuit on the port being tested:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as VC HO.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as STMN1toSTMN2.

e. Leave the Bidirectional check box checked. Leave the default value for State.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same VC and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

k. In the VC Optimization dialog box, leave all defaults.

l. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list and is described in the Dir column as a two-way circuit.


Note It is normal for the "LPBKTERMINAL (STM1E, STMN)" condition, page 2-174 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the terminal loopback on the destination port being tested:

a. In node view, double-click the card that requires the loopback, such as the destination optical card in the source node.

b. Click the Maintenance > Loopback > Port tabs.

c. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

d. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Terminal Loopback Circuit" procedure.


Test and Clear the Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback state on the port:

a. Double-click the card in the source node with the terminal loopback.

b. Click the Maintenance > Loopback > Port tabs.

c. Click None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Optical Card" procedure.


Test the Optical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the terminal loopback on the source card port before testing the next segment of the network path:

a. Double-click the source-node card with the terminal loopback.

b. Click the Maintenance > Loopback > Port tabs.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.3.3  Perform an XC Loopback on the Source Optical Port" procedure.


1.3.3  Perform an XC Loopback on the Source Optical Port


Note This procedure is only performed on STM-N cards and cross-connect cards.



Note You can perform an XC loopback on either the circuit source working or the protect port of a 1+1 protection group.


The cross-connect (XC) loopback test occurs on the XC-VXL cross-connect card in a network circuit. Completing a successful XC loopback from an optical card through the cross-connect card eliminates the cross-connect card as the source of trouble for a faulty circuit. Figure 1-22 shows an example of an XC loopback path on a source STM-N port.

Figure 1-22 XC Loopback on a Source STM-N Port

Complete the "Create the XC Loopback on the Source STM-N Port" procedure.

Create the XC Loopback on the Source STM-N Port


Step 1 Connect an optical test set to the port you are testing:


Note For specific procedures to connect, set up, and use the test set equipment, consult the manufacturer.


a. If you just completed the "1.3.2  Perform a Terminal Loopback on a Source-Node Optical Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. The transmit and receive terminals connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to put the circuit being tested out of service:

a. In node view, click the Circuits tab.

b. Click the circuit and then click Edit.

c. In the Edit Circuit dialog box, click the State tab.

d. Choose Locked,maintenance from the Target Circuit State drop-down list.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Use CTC to set up the XC loopback on the circuit being tested:

a. In node view, double-click the optical card to display the card view.

b. Click the Maintenance > Loopback > VC4 tabs.

c. Click the check box in the XC Loopback column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.'

Step 5 Complete the "Test and Clear the XC Loopback Circuit" procedure.


Test and Clear the XC Loopback Circuit


Note This procedure is performed only on optical cards.



Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the cross-connect. Clear the XC loopback:

a. In card view, click the Maintenance > Loopback > VC4 tabs.

b. Uncheck the check box in the XC Loopback column for the circuit being tested.

c. Click Apply.

d. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the Standby XC-VXL Cross-Connect Card" procedure.


Test the Standby XC-VXL Cross-Connect Card


Note This procedure is performed only on XC cards.



Step 1 Perform a reset on the standby cross-connect card:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. Position the cursor over the standby cross-connect card.

c. Right-click and choose RESET CARD.

d. Click Yes in the confirmation dialog box.

Step 2 Initiate an external switching command (side switch) on the cross-connect cards before you retest the loopback circuit:


Caution Cross-connect side switches are service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms.

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In the node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 3 Resend test traffic on the loopback circuit.

The test traffic now travels through the alternate cross-connect card.

Step 4 If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear the XC loopback circuit:

a. Click the Circuits tab.

b. Choose the XC loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the XC loopback circuit is deleted form the Circuits tab list. If the test set indicates a good circuit, the problem might be a defective cross-connect card.

Step 5 To confirm a defective original cross-connect card, complete the "Retest the Original XC-VXL Cross-Connect Card" procedure.


Retest the Original XC-VXL Cross-Connect Card


Note This procedure is performed only on STM-N and XC cards.



Step 1 Initiate an external switching command (side switch) on the cross-connect cards:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 2 Resend test traffic on the loopback circuit.

Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Proceed to Step 5. If the circuit is not shown to be faulty and the card is not shown to be defective, you are finished with testing.

Step 5 Complete the "Physically Replace an In-Service Cross-Connect Card" procedure for the defective cross-connect card and perform Step 6.

Step 6 If the test set indicates a good circuit, the cross-connect card might have had a temporary problem that was cleared by the side switch. Clear the XC loopback circuit:

a. Click the Circuits tab.

b. Choose the XC loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.3.4  Perform a Facility Loopback on an Intermediate-Node Optical Port" procedure.


1.3.4  Perform a Facility Loopback on an Intermediate-Node Optical Port

Performing the facility loopback test on an intermediate port isolates whether this node is causing circuit failure. In the situation shown in Figure 1-23, the test is being performed on an intermediate STM-N port.

Figure 1-23 Facility Loopback Path to an Intermediate-Node STM-N Port


Caution Performing a loopback on an Unlocked circuit is service-affecting.

Complete the "Create the Facility Loopback on an Intermediate-Node Optical Port" procedure.

Create the Facility Loopback on an Intermediate-Node Optical Port


Step 1 Connect an optical test set to the port you are testing:


Note For specific procedures to connect, set up, and use the test set equipment, consult the manufacturer.


a. If you just completed the "1.3.3  Perform an XC Loopback on the Source Optical Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source-node port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the facility loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as a VC HO.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as STMN1toSTMN3.

e. Leave the Bidirectional check box checked. Leave the default value for State.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box appears, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list and that it is described in the Dir column as a two-way circuit.


Note It is normal for a "LPBKFACILITY (STM1E, STMN)" condition, page 2-170. The condition clears when you remove the loopback.


Step 5 Create the facility loopback on the destination port being tested:

a. Go to the node view of the intermediate node:

From the View menu choose Go To Other Node.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the intermediate-node card that requires the loopback.

c. Click the Maintenance > Loopback > Port tabs.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Facility from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Facility Loopback Circuit" procedure.


Test and Clear the Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback state on the port:

a. Click the Maintenance > Loopback > Port tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Optical Card" procedure.


Test the Optical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback on the port:

a. Click the Maintenance > Loopback > Port tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.3.5  Perform a Terminal Loopback on an Intermediate-Node Optical Ports" procedure.


1.3.5  Perform a Terminal Loopback on an Intermediate-Node Optical Ports

In the next trouble-shooting test, you perform a terminal loopback on the intermediate-node port to isolate whether the destination port is causing circuit trouble. In the example situation in Figure 1-24, the terminal loopback is performed on the intermediate optical port in the circuit. You first create a bidirectional circuit that originates on the source-node optical port and loops back on the node destination port. You then proceed with the terminal loopback test. If you successfully complete a terminal loopback on the node, this node is excluded from possible sources of circuit trouble.

Figure 1-24 Terminal Loopback Path to an Intermediate-Node STM-N Port

STM-N cards placed in facility loopback state display an icon, shown in Figure 1-25.

Figure 1-25 Facility Loopback Indicator


Caution Performing a loopback on an Unlocked circuit is service-affecting.

Complete the "Create the Terminal Loopback on Intermediate-Node Optical Ports" procedure.

Create the Terminal Loopback on Intermediate-Node Optical Ports


Step 1 Connect an optical test set to the port you are testing:


Note For specific procedures to connect, set up, and use the test set equipment, consult the manufacturer.


a. If you just completed the "1.3.4  Perform a Facility Loopback on an Intermediate-Node Optical Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the terminal loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as a VC HO.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as STM1toSTM4.

e. Leave the Bidirectional check box checked. Leave the default value for State.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box appears, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list and that it is described as a two-way circuit in the Dir column.


Note It is normal for the "LPBKTERMINAL (STM1E, STMN)" condition, page 2-174 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the intermediate node:

From the View menu choose Go To Other Node.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback.

c. Click the Maintenance > Loopback > Port tabs.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Optical Terminal Loopback Circuit" procedure.


Test and Clear the Optical Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback on the port:

a. Double-click the intermediate-node card with the terminal loopback.

b. Click the Maintenance > Loopback > Port tabs.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Optical Card" procedure.


Test the Optical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port:

a. Double-click the source-node card with the terminal loopback.

b. Click the Maintenance > Loopback > Port tabs.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.3.6  Perform a Facility Loopback on a Destination-Node Optical Port" procedure.


1.3.6  Perform a Facility Loopback on a Destination-Node Optical Port

You perform a facility loopback test at the destination port to determine whether this local port is the source of circuit trouble. The example in Figure 1-26 shows a facility loopback being performed on an STM-N port.

Figure 1-26 Facility Loopback Path to a Destination-Node STM-N Port


Caution Performing a loopback on an Unlocked circuit is service-affecting.

Complete the "Create the Facility Loopback on a Destination-Node Optical Port" procedure.

Create the Facility Loopback on a Destination-Node Optical Port


Step 1 Connect an optical test set to the port you are testing. For specific procedures to use the test set equipment, consult the manufacturer.

a. If you just completed the "1.3.5  Perform a Terminal Loopback on an Intermediate-Node Optical Ports" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the hairpin circuit on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as VC HO.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as STMN1toSTMN5.

e. Leave the Bidirectional check box checked. Leave the default value for State.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box appears, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list and that it is described in the Dir column as a two-way circuit.


Note It is normal for the "LPBKFACILITY (STM1E, STMN)" condition, page 2-170 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the facility loopback on the destination port being tested:

a. Go to the node view of the destination node:

From the View menu choose Go To Other Node.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback, such as the destination-node optical, or G-Series, card.

c. Click the Maintenance > Loopback > Port tabs.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.


Note It is normal for the "LPBKFACILITY (STM1E, STMN)" condition, page 2-170 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 6 Complete the "Test and Clear the Facility Loopback Circuit" procedure.


Test the Optical Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback on the port:

a. Click the Maintenance > Loopback > Port tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Optical Card" procedure.


Test the Optical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback on the port:

a. Click the Maintenance > Loopback > Port tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.3.7  Perform a Terminal Loopback on a Destination-Node Optical Port" procedure.


1.3.7  Perform a Terminal Loopback on a Destination-Node Optical Port

The terminal loopback at the destination-node port is the final local hardware error elimination in the circuit troubleshooting process. If this test is completed successfully, you have verified that the circuit is good up to the destination port. The example in Figure 1-27 shows a terminal loopback on an intermediate-node destination STM-N port.

Figure 1-27 Terminal Loopback Path to a Destination-Node STM-N Port


Caution Performing a loopback on an Unlocked circuit is service-affecting.

Complete the "Create the Terminal Loopback on a Destination-Node Optical Port" procedure.

Create the Terminal Loopback on a Destination-Node Optical Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.3.6  Perform a Facility Loopback on a Destination-Node Optical Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the terminal loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as a VC HO.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as STMN1toSTMN6.

e. Leave the Bidirectional check box checked. Do not change the State default value.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box appears, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list and that it is described in the Dir column as a two-way circuit.


Note It is normal for the "LPBKTERMINAL (STM1E, STMN)" condition, page 2-174 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the destination node:

From the View menu choose Go To Other Node.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback, such as the destination-node optical, or G-Series card.

c. Click the Maintenance > Loopback > Port tabs.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Optical Terminal Loopback Circuit" procedure.


Test and Clear the Optical Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback on the port:

a. Double-click the intermediate-node card with the terminal loopback.

b. Click the Maintenance > Loopback > Port tabs.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live traffic. If the test set indicates a faulty circuit, the problem might be a faulty card.

Step 6 Complete the "Test the Optical Card" procedure.


Test the Optical Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port:

a. Double-click the source-node card with the terminal loopback.

b. Click the Maintenance > Loopback > Port tabs.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live traffic.


1.4  Troubleshooting Ethernet Circuit Paths With Loopbacks

Terminal loopbacks and hairpin circuits can be used in the order shown in this section to troubleshoot an Ethernet circuit path for the G-Series and CE-Series cards. E-Series and ML-Series do not have this capability in Software Release 8.0. The example in this section tests a G1000 or CE-MR-10 circuit on a three-node MS-SPRing. Using a series of facility loopbacks and terminal loopbacks, the example scenario traces the circuit path, tests the possible failure points, and eliminates them. The logical progression contains six network test procedures:


Note The test sequence for your circuits will differ according to the type of circuit and network topology.


1. A facility loopback on the source-node Ethernet port

2. A terminal loopback on the source-node Ethernet port

3. A hairpin on the source-node Ethernet port

4. A facility loopback on the intermediate-node Ethernet port

5. A terminal loopback on the intermediate-node Ethernet port

6. A facility loopback on the destination-node Ethernet port

7. A terminal loopback on the destination-node Ethernet port

8. A hairpin on the destination-node Ethernet port


Note Facility and terminal loopback tests require on-site personnel.


1.4.1  Perform a Facility Loopback on a Source-Node Ethernet Port

The facility loopback test is performed on the node source port in the network circuit. In the testing situation used in this example, the source G1000 port in the source node. Completing a successful facility loopback on this port isolates the G1000 port as a possible failure point. Figure 1-28 shows an example of a facility loopback on a circuit source Ethernet port.

Figure 1-28 Facility Loopback on a Circuit Source Ethernet Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Facility Loopback on the Source-Node Ethernet Port" procedure.

Create the Facility Loopback on the Source-Node Ethernet Port


Step 1 Connect an optical test set to the port you are testing. For instructions to use the test-set equipment, consult the manufacturer.

Use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. The transmit and receive terminals connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 In CTC node view, double-click the card to display the card view.

Step 4 Click the Maintenance > Loopback tab.

Step 5 Choose Locked,maintenance from the Admin State column for the port being tested. If this is a multiport card, select the appropriate row for the desired port.

Step 6 Choose Facility from the Loopback Type column for the port being tested. If this is a multiport card, select the appropriate row for the desired port.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.


Note It is normal for a "LPBKFACILITY (G1000)" condition on page 2-169 to appear during loopback setup. The condition clears when you remove the loopback.


Step 9 Complete the "Test and Clear the Facility Loopback Circuit" procedure.


Test and Clear the Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the Ethernet Card" procedure.


Test the Ethernet Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Complete the "1.4.2  Perform a Terminal Loopback on a Source-Node Ethernet Port" procedure.


1.4.2  Perform a Terminal Loopback on a Source-Node Ethernet Port

The terminal loopback test is performed on the node source Ethernet port. For the circuit in this example, it is the source G1000 port in the source node. You first create a bidirectional circuit that starts on the node destination G1000 port and loops back on the node source G1000 port.You then proceed with the terminal loopback test. Completing a successful terminal loopback to a node source port verifies that the circuit is good to the source port. Figure 1-29 shows terminal loopback on a G-Series port.

Figure 1-29 Terminal Loopback on a G-Series Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Terminal Loopback on a Source-Node Ethernet Port" procedure.

Create the Terminal Loopback on a Source-Node Ethernet Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.4.1  Perform a Facility Loopback on a Source-Node Ethernet Port" procedure, leave the optical test set hooked up to the Ethernet port in the source node.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the terminal loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as G1K1toG1K2.

e. Leave the Bidirectional check box checked.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.


Note It is normal for the "LPBKTERMINAL (G1000)" condition on page 2-173 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the terminal loopback on the destination port being tested:

a. In node view, double-click the card that requires the loopback, such as the destination G1000 card in the source node.

b. Click the Maintenance > Loopback tab.

c. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

d. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Ethernet Terminal Loopback Circuit" procedure.


Test and Clear the Ethernet Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback state on the port:

a. Double-click the card in the source node with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Ethernet Card" procedure.


Test the Ethernet Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port before testing the next segment of the network circuit path:

a. Double-click the card in the source node with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Clear the terminal loopback circuit before testing the next segment of the network circuit path:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.4.3  Perform a Hairpin Test on a Source-Node Ethernet Port" procedure.


1.4.3  Perform a Hairpin Test on a Source-Node Ethernet Port

The hairpin test is performed on the XC-VXL cross-connect card in the network circuit. A hairpin circuit uses the same port for both source and destination. Completing a successful hairpin through the card isolates the possibility that the cross-connect card is the cause of the faulty circuit. Figure 1-30 shows an example of a hairpin loopback on a source-node port.

Figure 1-30 Hairpin on a Source-Node Ethernet Port


Note The ONS 15454 SDH does not support simplex operation on the XC-VXL cross-connect card. Two cross-connect cards of the same type must be installed for each node.


Complete the "Create the Hairpin Circuit on the Source-Node Ethernet Port" procedure.

Create the Hairpin Circuit on the Source-Node Ethernet Port


Step 1 Connect an Ethernet test set to the port you are testing:

a. If you just completed the "1.4.2  Perform a Terminal Loopback on a Source-Node Ethernet Port" procedure, leave the Ethernet test set hooked up to the source-node Ethernet port.

b. If you are starting the current procedure without the Ethernet test set hooked up to the source port, use appropriate cabling to connect the Ethernet test set to the port you are testing.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the hairpin circuit on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as VC HO Path Circuit and number of circuits, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as Hairpin1.

e. Choose the Size, such as VC4.

f. Uncheck the Bidirectional check box. Leave the default value for State, SD Threshold, and SF Threshold.

g. Click Next.

h. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits. Leave Use Secondary Source unchecked.

i. Click Next.

j. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the Circuit Source dialog box. Leave Use Secondary Destination unchecked.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box is displayed, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it as a one-way circuit.

Step 5 Complete the "Test and Delete the Ethernet Port Hairpin Circuit" procedure.


Test and Delete the Ethernet Port Hairpin Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the hairpin circuit. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 4 Complete the "Test the Standby XC-VXL Cross-Connect Card" procedure.


Test the Standby XC-VXL Cross-Connect Card


Note Two XC-VXL cross-connect cards (active and standby) must be in use on a node to use this procedure.



Step 1 Perform a reset on the standby cross-connect card to make it the active card:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. Position the cursor over the standby cross-connect card.

c. Right-click and choose RESET CARD.

d. Click Yes in the confirmation dialog box.

Step 2 Initiate an external switching command (side switch) on the cross-connect cards before you retest the loopback circuit:


Caution Cross-connect side switches are service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms.

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In the node view, select the Maintenance > Cross Connect > Cards tabs.

c. In the Cross Connect Cards menu, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 3 Resend test traffic on the loopback circuit.

The test traffic now travels through the alternate cross-connect card.

Step 4 If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 5 To confirm a defective original cross-connect card, complete the "Retest the Original XC-VXL Cross-Connect Card" procedure.


Retest the Original XC-VXL Cross-Connect Card


Step 1 Initiate an external switching command (side switch) on the cross-connect cards:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active cross-connect ACT/STBY LED is green.

b. In node view, select the Maintenance > Cross Connect > Cards tabs.

c. From the Cross Connect Cards menu, choose Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 2 Resend test traffic on the loopback circuit.

Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace an In-Service Cross-Connect Card" procedure for the defective card.

Step 5 Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 6 Complete the "1.4.4  Perform a Facility Loopback on an Intermediate-Node Ethernet Port" procedure.


1.4.4  Perform a Facility Loopback on an Intermediate-Node Ethernet Port

Performing the facility loopback test on an intermediate port isolates whether this node is causing circuit failure. It is shown in Figure 1-31.

Figure 1-31 Facility Loopback on an Intermediate-Node Ethernet Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create a Facility Loopback on an Intermediate-Node Ethernet Port" procedure.

Create a Facility Loopback on an Intermediate-Node Ethernet Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.4.2  Perform a Terminal Loopback on a Source-Node Ethernet Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the facility loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as G1KtoG1K3.

e. Leave the Bidirectional check box checked.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.


Note It is normal for the "LPBKFACILITY (G1000)" condition on page 2-169 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the facility loopback on the destination port being tested:

a. Go to the node view of the intermediate node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the intermediate-node card that requires the loopback.

c. Click the Maintenance > Loopback tab.

d. Select OOS,MT from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Facility from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Ethernet Facility Loopback Circuit" procedure.


Test and Clear the Ethernet Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback from the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Ethernet Card" procedure.


Test the Ethernet Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback from the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.4.5  Perform a Terminal Loopback on an Intermediate-Node Ethernet Port" procedure.


1.4.5  Perform a Terminal Loopback on an Intermediate-Node Ethernet Port

In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate whether the destination port is causing circuit trouble. In the example situation in Figure 1-32, the terminal loopback is performed on an intermediate Ethernet port in the circuit. You first create a bidirectional circuit that originates on the source-node Ethernet port and loops back on the intermediate-node port. You then proceed with the terminal loopback test. If you successfully complete a terminal loopback on the node, this node is excluded from possible sources of circuit trouble.

Figure 1-32 Terminal Loopback on an Intermediate-Node Ethernet Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create a Terminal Loopback on an Intermediate-Node Ethernet Port" procedure.

Create a Terminal Loopback on an Intermediate-Node Ethernet Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.4.4  Perform a Facility Loopback on an Intermediate-Node Ethernet Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the terminal loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as G1K1toG1K4.

e. Leave the Bidirectional check box checked.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list and that it is described in the Dir column as a two-way circuit.


Note It is normal for the "LPBKTERMINAL (G1000)" condition on page 2-173 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the intermediate node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback.

c. Click the Maintenance > Loopback tab.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Ethernet Terminal Loopback Circuit" procedure.


Test and Clear the Ethernet Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback from the port:

a. Double-click the intermediate-node card with the terminal loopback to display the card view.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Ethernet Card" procedure.


Test the Ethernet Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port:

a. Double-click the source-node card with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.4.6  Perform a Facility Loopback on a Destination-Node Ethernet Port" procedure.


1.4.6  Perform a Facility Loopback on a Destination-Node Ethernet Port

You perform a facility loopback test at the destination port to determine whether this local port is the source of circuit trouble. The example in Figure 1-33 shows a facility loopback being performed on an Ethernet port.

Figure 1-33 Facility Loopback on a Destination-Node Ethernet Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Facility Loopback on a Destination-Node Ethernet Port" procedure.

Create the Facility Loopback on a Destination-Node Ethernet Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.4.5  Perform a Terminal Loopback on an Intermediate-Node Ethernet Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the hairpin circuit on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as G1K1toG1K5.

e. Leave the Bidirectional check box checked.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.


Note It is normal for a "LPBKFACILITY (G1000)" condition on page 2-169 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the facility loopback on the destination port being tested:

a. Go to the node view of the destination node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback.

c. Click the Maintenance > Loopback tab.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Facility from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Ethernet Facility Loopback Circuit" procedure.


Test and Clear the Ethernet Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback from the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 5 Complete the "Test the Ethernet Card" procedure.


Test the Ethernet Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 3 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 4 Clear the facility loopback on the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 5 Clear the facility loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 6 Complete the "1.4.7  Perform a Terminal Loopback on a Destination-Node Ethernet Port" procedure.


1.4.7  Perform a Terminal Loopback on a Destination-Node Ethernet Port

The terminal loopback at the destination-node port is the final local hardware error elimination in the circuit troubleshooting process. If this test is completed successfully, you have verified that the circuit is good up to the destination port. The example in Figure 1-34 shows a terminal loopback on an intermediate-node destination Ethernet port.

Figure 1-34 Terminal Loopback on a Destination-Node Ethernet Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Terminal Loopback on a Destination-Node Ethernet Port" procedure.

Create the Terminal Loopback on a Destination-Node Ethernet Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.4.6  Perform a Facility Loopback on a Destination-Node Ethernet Port" procedure, leave the optical test set hooked up to the source port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the terminal loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as G1K1toG1K6.

e. Leave the Bidirectional check box checked.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.


Note It is normal for the "LPBKTERMINAL (G1000)" condition on page 2-173 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 5 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the destination node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback.

c. Click the Maintenance > Loopback tab.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 6 Complete the "Test and Clear the Ethernet Terminal Loopback Circuit" procedure.


Test and Clear the Ethernet Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback from the port:

a. Double-click the intermediate-node card with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live traffic.

Step 5 If the test set indicates a faulty circuit, the problem might be a faulty card.

Step 6 Complete the "Test the Ethernet Card" procedure.


Test the Ethernet Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good card.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port:

a. Double-click the source-node card with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Clear the terminal loopback circuit:

a. Click the Circuits tab.

b. Choose the loopback circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

Step 7 Complete the "1.4.8  Perform a Hairpin Test on a Destination-Node Ethernet Port" procedure.


1.4.8  Perform a Hairpin Test on a Destination-Node Ethernet Port

The hairpin test is performed on the cross-connect card in the network circuit. A hairpin circuit uses the same port for both source and destination. Completing a successful hairpin through the card isolates the possibility that the cross-connect card is the cause of the faulty circuit. Figure 1-35 shows an example of a hairpin loopback on a destination-node port.

Figure 1-35 Hairpin on a Destination-Node Ethernet Port


Note The ONS 15454 SDH does not support simplex operation on the XC-VXL cross-connect card. Two cross-connect cards of the same type must be installed for each node.


Complete the "Create the Hairpin Circuit on the Destination-Node Port" procedure.

Create the Hairpin Circuit on the Destination-Node Port


Step 1 Connect an Ethernet test set to the port you are testing:

a. If you just completed the "1.4.7  Perform a Terminal Loopback on a Destination-Node Ethernet Port" procedure, leave the Ethernet test set hooked up to the Ethernet port in the destination node.

b. If you are starting the current procedure without the Ethernet test set hooked up to the Ethernet port, use appropriate cabling to connect the Ethernet test set to the port you are testing.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the hairpin circuit on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type and size, such as VC HO Path Circuit, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as Hairpin1.

e. Uncheck the Bidirectional check box. Leave the default value for State, SD Threshold, and SF Threshold.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the test set is connected. Select VC and Tug only for LO circuits. Leave Use Secondary Source unchecked.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for the source dialog box. Leave Use Secondary Destination unchecked.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.

l. If the VC Optimization dialog box appears, leave all defaults.

m. Click Finish.

Step 4 Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it as a one-way circuit.

Step 5 Complete the "Test and Delete the Ethernet Hairpin Circuit" procedure.


Test and Delete the Ethernet Hairpin Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the hairpin circuit. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits box.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 4 Complete the "Test the Standby XC-VXL Cross-Connect Card" procedure.


Test the Standby XC-VXL Cross-Connect Card


Note Two XC-VXL cross-connect cards (active and standby) must be in use on a node to use this procedure.



Step 1 Perform a reset on the standby XC-VXL cross-connect card to make it the active card:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. Position the cursor over the standby cross-connect card.

c. Right-click and choose RESET CARD.

d. Click Yes in the confirmation dialog box.

Step 2 Initiate an external switching command (side switch) on the cross-connect cards before you retest the loopback circuit:


Caution Cross-connect side switches are service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms.

a. Determine the standby XC-VXL cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In the node view, select the Maintenance > Cross-Connect > Card tabs.

c. In the Cross-Connect Cards area, click Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active XC-VXL cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 3 Resend test traffic on the loopback circuit.

The test traffic now travels through the alternate cross-connect card.

Step 4 If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

Step 5 To confirm a defective original cross-connect card, complete the "Retest the Original XC-VXL Cross-Connect Card" procedure.


Retest the Original XC-VXL Cross-Connect Card


Step 1 Initiate an external switching command (side switch) on the XC-VXL cross-connect cards:

a. Determine the standby cross-connect card. On both the physical node and the CTC node view window, the standby cross-connect ACT/STBY LED is amber and the active card ACT/STBY LED is green.

b. In node view, select the Maintenance > Cross-Connect > Card tabs.

c. From the Cross-Connect Cards menu, choose Switch.

d. Click Yes in the Confirm Switch dialog box.


Note After the active cross-connect goes into standby mode, the original standby card becomes active and its ACT/STBY LED turns green. The former active card becomes standby and its ACT/STBY LED turns amber.


Step 2 Resend test traffic on the loopback circuit.

Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Proceed to Step 5. If the test does not indicate a faulty circuit, proceed to Step 6.

Step 5 Complete the "Physically Replace an In-Service Cross-Connect Card" procedure for the defective cross-connect card.

Step 6 If the test set indicates a good circuit, the cross-connect card might have had a temporary problem that was cleared by the side switch. Clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.

e. Confirm that the hairpin circuit is deleted form the Circuits tab list.

The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live traffic.


1.5  Troubleshooting FC_MR Circuit Paths With Loopbacks

The FC_MR loopback test for circuit path failure differs from electrical, optical, and Ethernet testing in that loopback testing does not require circuit creation. FC_MR client ports are statically mapped to the trunk ports so no signal needs to traverse the cross-connect card (in a circuit) to test the loopback.

You can use these procedures on FC_MR cards. The example in this section tests a circuit on a three-node MS-SPRing. Using a series of facility loopbacks, hairpin circuits, and terminal loopbacks, the example scenario traces the circuit path, tests the possible failure points, and eliminates them. The logical progression contains six network test procedures:

1. A facility loopback on the source-node FC_MR port

2. A terminal loopback on the source-node FC_MR port

3. A facility loopback on the intermediate-node FC_MR port

4. A terminal loopback on the intermediate-node FC_MR port

5. A facility loopback on the destination-node FC_MR port

6. A terminal loopback on the destination-node FC_MR port


Note Loopbacks are not available for DWDM cards in this release.



Note The test sequence for your circuits will differ according to the type of circuit and network topology.



Note Facility, hairpin, and terminal loopback tests require on-site personnel.


1.5.1  Perform a Facility Loopback on a Source-Node FC_MR Port

The facility loopback test is performed on the node source port in the network circuit. In the testing situation used in this example, the source muxponder or transponder FC_MR port in the source node. Completing a successful facility loopback on this port isolates the FC_MR port as a possible failure point. Figure 1-36 shows an example of a facility loopback on a circuit source FC_MR port.

Figure 1-36 Facility Loopback on a Circuit Source FC_MR Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Facility Loopback on the Source-Node FC_MR Port" procedure.

Create the Facility Loopback on the Source-Node FC_MR Port


Step 1 Connect an optical test set to the port you are testing.


Note For instructions to use the test-set equipment, consult the manufacturer.


Use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. The transmit and receive terminals connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 In CTC node view, double-click the card to display the card view.

Step 4 Click the Maintenance > Loopback tab.

Step 5 Choose Locked,maintenance from the Admin State column for the port being tested. If this is a multiport card, select the appropriate row for the desired port.

Step 6 Choose Facility from the Loopback Type column for the port being tested. If this is a multiport card, select the appropriate row for the desired port.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.


Note It is normal for a "LPBKFACILITY (FCMR)" condition on page 2-168 to appear during loopback setup. The condition clears when you remove the loopback.


Step 9 Complete the "Test and Clear the FC_MR Facility Loopback Circuit" procedure.


Test and Clear the FC_MR Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the FC_MR Card" procedure.


Test the FC_MR Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Complete the "1.5.2  Perform a Terminal Loopback on a Source-Node FC_MR Port" procedure.


1.5.2  Perform a Terminal Loopback on a Source-Node FC_MR Port

The terminal loopback test is performed on the source-node FC_MR port. For the circuit in this example, it is the source FC_MR port in the source node. Completing a successful terminal loopback to a node source port verifies that the circuit is good to the source port. Figure 1-37 shows an example of a terminal loopback on a source FC_MR port.

Figure 1-37 Terminal Loopback on a Source-Node FC_MR Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Terminal Loopback on a Source-Node FC_MR Port" procedure.

Create the Terminal Loopback on a Source-Node FC_MR Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.5.1  Perform a Facility Loopback on a Source-Node FC_MR Port" procedure, leave the optical test set hooked up to the FC_MR port in the source node.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 In node view, double-click the card that requires the loopback, such as the destination STM-N card in the source node.

Step 4 Click the Maintenance > Loopback tab.

Step 5 Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

Step 6 Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.

Step 9 Complete the "Test and Clear the FC_MR Port Terminal Loopback Circuit" procedure.


Test and Clear the FC_MR Port Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback state on the port:

a. Double-click the card in the source node with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the FC_MR Card" procedure.


Test the FC_MR Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port before testing the next segment of the network circuit path:

a. Double-click the card in the source node with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Complete the "1.5.3  Perform a Facility Loopback on an Intermediate-Node FC_MR Port" procedure.


1.5.3  Perform a Facility Loopback on an Intermediate-Node FC_MR Port

Performing the facility loopback test on an intermediate port isolates whether this node is causing circuit failure. In the situation shown in Figure 1-38, the test is being performed on an intermediate FC_MR port.

Figure 1-38 Facility Loopback on an Intermediate-Node FC_MR Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create a Facility Loopback on an Intermediate-Node FC_MR Port" procedure.

Create a Facility Loopback on an Intermediate-Node FC_MR Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.5.2  Perform a Terminal Loopback on a Source-Node FC_MR Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 In node view, double-click the intermediate-node card that requires the loopback.

Step 4 Click the Maintenance > Loopback tab.

Step 5 Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

Step 6 Select Facility from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

Step 7 Click Apply.

Step 8 Click Yes in the confirmation dialog box.

Step 9 Complete the "Test and Clear the FC_MR Port Facility Loopback Circuit" procedure.


Test and Clear the FC_MR Port Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback from the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the FC_MR Card" procedure.


Test the FC_MR Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback from the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Complete the "1.5.4  Perform a Terminal Loopback on Intermediate-Node FC_MR Ports" procedure.


1.5.4  Perform a Terminal Loopback on Intermediate-Node FC_MR Ports

In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate whether the destination port is causing circuit trouble. In the example situation in Figure 1-39, the terminal loopback is performed on an intermediate FC_MR port in the circuit. If you successfully complete a terminal loopback on the node, this node is excluded from possible sources of circuit trouble.

Figure 1-39 Terminal Loopback on an Intermediate-Node FC_MR Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create a Terminal Loopback on Intermediate-Node FC_MR Ports" procedure.

Create a Terminal Loopback on Intermediate-Node FC_MR Ports


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.5.3  Perform a Facility Loopback on an Intermediate-Node FC_MR Port" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the intermediate node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback.

c. Click the Maintenance > Loopback tab.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test and Clear the FC_MR Terminal Loopback Circuit" procedure.


Test and Clear the FC_MR Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback from the port:

a. Double-click the intermediate-node card with the terminal loopback to display the card view.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the FC_MR Card" procedure.


Test the FC_MR Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port:

a. Double-click the source-node card with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 6 Complete the "1.5.5  Perform a Facility Loopback on a Destination-Node FC_MR Port" procedure.


1.5.5  Perform a Facility Loopback on a Destination-Node FC_MR Port

You perform a facility loopback test at the destination port to determine whether this local port is the source of circuit trouble. The example in Figure 1-40 shows a facility loopback being performed on an FC_MR port.

Figure 1-40 Facility Loopback on a Destination-Node FC_MR Port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Facility Loopback on a Destination-Node FC_MR Port" procedure.

Create the Facility Loopback on a Destination-Node FC_MR Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.5.4  Perform a Terminal Loopback on Intermediate-Node FC_MR Ports" procedure, leave the optical test set hooked up to the source-node port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Create the facility loopback on the destination port being tested:

a. Go to the node view of the destination node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback.

c. Click the Maintenance > Loopback tab.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Facility from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test and Clear the FC_MR Facility Loopback Circuit" procedure.


Test and Clear the FC_MR Facility Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the facility loopback from the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 4 Complete the "Test the FC_MR Card" procedure.


Test the FC_MR Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good one.

Step 2 Resend test traffic on the loopback circuit with a known-good card installed.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the faulty card.

Step 5 Clear the facility loopback on the port:

a. Click the Maintenance > Loopback tab.

b. Choose None from the Loopback Type column for the port being tested.

c. Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the Admin State column for the port being tested.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Complete the "1.5.6  Perform a Terminal Loopback on a Destination-Node FC_MR Port" procedure.


1.5.6  Perform a Terminal Loopback on a Destination-Node FC_MR Port

The terminal loopback at the destination-node port is the final local hardware error elimination in the circuit troubleshooting process. If this test is completed successfully, you have verified that the circuit is good up to the destination port. The example in Figure 1-41 shows a terminal loopback on an intermediate-node destination FC_MR port.

Figure 1-41 Terminal Loopback on a Destination-Node FC_MR port


Caution Performing a loopback on an in-service circuit is service-affecting.

Complete the "Create the Terminal Loopback on a Destination-Node FC_MR Port" procedure.

Create the Terminal Loopback on a Destination-Node FC_MR Port


Step 1 Connect an optical test set to the port you are testing:


Note For instructions to use the test-set equipment, consult the manufacturer.


a. If you just completed the "1.5.5  Perform a Facility Loopback on a Destination-Node FC_MR Port" procedure, leave the optical test set hooked up to the source port.

b. If you are starting the current procedure without the optical test set hooked up to the source port, use appropriate cabling to attach the transmit and receive terminals of the optical test set to the port you are testing. Both transmit and receive connect to the same port.

Step 2 Adjust the test set accordingly.

Step 3 Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.


Note It is normal for the "LP-ENCAP-MISMATCH" condition on page 2-175 or the "LPBKTERMINAL (FCMR)" condition on page 2-172 to appear during a loopback setup. The condition clears when you remove the loopback.


Step 4 Create the terminal loopback on the destination port being tested:

a. Go to the node view of the destination node:

Choose View > Go To Other Node from the menu bar.

Choose the node from the drop-down list in the Select Node dialog box and click OK.

b. In node view, double-click the card that requires the loopback.

c. Click the Maintenance > Loopback tab.

d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row appropriate for the desired port.

e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row appropriate for the desired port.

f. Click Apply.

g. Click Yes in the confirmation dialog box.

Step 5 Complete the "Test and Clear the FC_MR Terminal Loopback Circuit" procedure.


Test and Clear the FC_MR Terminal Loopback Circuit


Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the terminal loopback from the port:

a. Double-click the intermediate-node card with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Step 4 If the test set indicates a faulty circuit, the problem might be a faulty card.

Step 5 Complete the "Test the FC_MR Card" procedure.


Test the FC_MR Card


Step 1 Complete the "Physically Replace a Traffic Card" procedure for the suspected bad card and replace it with a known-good card.

Step 2 Resend test traffic on the loopback circuit with a known-good card.

Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.

Step 4 Complete the "Physically Replace a Traffic Card" procedure for the defective card.

Step 5 Clear the terminal loopback on the port:

a. Double-click the source-node card with the terminal loopback.

b. Click the Maintenance > Loopback tab.

c. Select None from the Loopback Type column for the port being tested.

d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the Admin State column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live traffic.


1.6  Using CTC Diagnostics

CTC provides diagnostics for the following functions:

Verification of proper card ASICS function

Verification of standby card operation

Verification of proper card LED operation

Notification of problems detected via alarms

A downloaded, machine-readable diagnostic file to be used by Cisco TAC

Some of these functions, such as ASIC verification and standby card operation, are invisibly monitored in background functions. Change or problem notifications are provided in the Alarms and Conditions window. Other diagnostic functions—verifying card LED function and downloading diagnostic files for technical support—are available in the node view Maintenance > Diagnostic tab. The user-accessible diagnostic features are described in the following paragraphs.

1.6.1  Card LED Lamp Tests

A card LED lamp test determines whether card-level indication LEDs are operational. This diagnostic test is run as part of the initial ONS 15454 SDH turn up, during maintenance routines, or any time you question whether an LED is in working order. Maintenance or higher-level users can complete the following tasks to verify LED operation.

Verify General Card LED Operation


Step 1 In node view, click the Maintenance > Diagnostic tab (Figure 1-42).

Figure 1-42 CTC Node View Diagnostic Window

Step 2 Click Lamp Test.

Step 3 Watch to make sure all the port LEDs illuminate simultaneously for several seconds.

Step 4 Click OK in the Lamp Test Run dialog box.

With the exceptions previously described, if an STM-N or electrical port LED does not light up, the LED is faulty. Return the defective card to Cisco through the RMA process. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.


Verify G-Series Ethernet or FC_MR Card LED Operation


Note G-Series and FC_MR card-level LEDs illuminate during a lamp test, but the port-level LEDs do not.



Step 1 Complete the "Verify General Card LED Operation" procedure to verify that card-level LEDs are operational.

Step 2 Use the following list of guidelines to physically test whether the G-Series Ethernet port LEDs are operating correctly. If the LED appears as described when the listed state is occurring for the port, the LED is considered to be functioning correctly. Consult the following guidelines:

Clear port LED: Should only occur if there is a loss of receive link (such as a disconnected link or unplugged Ethernet Gigabit Interface Converters [GBICs]). An LOS alarm could be present on the port.

Amber port LED: Should only occur if a port is disabled but the link is connected; or if the port is enabled and the link is connected, but a transport failure is present. A TPTFAIL alarm can be present on the port.

Green port LED: Should occur if the port is enabled and has no errors against it or traffic in it; can also occur if the port is enabled, has no errors, and is running traffic proportionate to the blink rate. No traffic-affecting port alarms should be present.

Step 3 If you are unable to determine the port state, log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.


Verify E-Series and ML-Series Ethernet Card LED Operation


Note E-Series and ML-Series card-level LEDs illuminate during a lamp test, but the port-level LEDs do not.



Note For information about the ML-Series card, refer to the Ethernet Card Software Feature and Configuration Guide for the Cisco ONS 15454, Cisco ONS 15454 SDH, and Cisco ONS 15327.



Step 1 Complete the "Verify General Card LED Operation" procedure to verify that card-level LEDs are operational.

Step 2 Use the following list of guidelines to physically test whether the single E-Series or ML-Series Ethernet port LED is operating correctly. If the LED appears as described when the listed state is occurring for the port, the LED is considered to be functioning correctly.

Clear port LED: Should only occur is there is a loss of receive link (such as a disconnected link or unplugged GBIC), or if traffic is flowing in one direction (either transmit or receive). A CARLOSS alarm could be present on the port.

Amber port LED: Should only occur if the link is connected and the physical port is transmitting and receiving traffic.

Green port LED: Should occur if the link is up and no traffic is flowing on the port.

Step 3 If you are unable to determine the port state, log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.


1.6.2  Retrieve Diagnostics File Button

When you click the Retrieve Diagnostics File button in the Maintenance window, CTC retrieves system data that can be off-loaded by a Maintenance or higher-level user to a local directory and sent to Technical Support for troubleshooting purposes. The diagnostics file is in machine language and is not human-readable, but can be used by Cisco Technical Support for problem analysis. Complete the following task to off-load the diagnostics file.


Note In addition to the machine-readable diagnostics file, the ONS 15454 SDH also stores an audit trail of all system events such as user logins, remote logins, configuration, and changes. This audit trail is considered a record-keeping feature rather than a troubleshooting feature. Information about the feature is located in the "Maintain the Node" chapter of the Cisco ONS 15454 SDH Procedure Guide.


Off-Load the Diagnostics File


Step 1 In the node view, click the Maintenance > Diagnostic tab (Figure 1-42).

Step 2 Click Retrieve Tech Support Log.

Step 3 In the Saving Diagnostic File dialog box, navigate to the directory (local or network) where you want to save the file.

Step 4 Enter a name in the File Name field.

You do not have to give the archive file a particular extension. It is readable in any application that supports text files, such as WordPad, Microsoft Word (imported), etc.

Step 5 Click Save.

The Get Diagnostics status window shows a progress bar indicating the percentage of the file being saved, then shows "Get Diagnostics Complete."

Step 6 Click OK.


1.6.3  Data Communications Network Tool

CTC contains a DCN tool that assists with network troubleshooting for Open Shortest Path First (OSPF) networks. This tool, located in network view, is shown in Figure 1-43. It executes an internal dump command to retrieve information about all nodes accessible from the entry point.

Figure 1-43 DCN Tools OSPF Dump

The dump, which provides the same information as a dump executed by special networking commands, is available at the network view in the Maintenance > Diagnostic tabs. You can select the access point node in the Select Node drop-down list. To create the dump, click Retrieve. (To clear the dump, click Clear.)

The contents of this file can be saved or printed and furnished to Cisco Technical Support for use in OSPF network support.

1.7  Restoring the Database and Default Settings

This section contains troubleshooting for node operation errors that require restoration of software data or the default node setup.

1.7.1  Restore the Node Database

Symptom    One or more nodes does not function properly or has incorrect data.

Possible Cause    Incorrect or corrupted node database.

Recommended Action    Restore the database using the procedure in the "Maintain the Node" chapter of the Cisco ONS 15454 SDH Procedure Guide.

1.8  PC Connectivity Troubleshooting

This section contains information about system minimum requirements, supported platforms, browsers, and JREs for R8.0, and troubleshooting procedures for PC and network connectivity to the ONS 15454 SDH.

1.8.1  PC System Minimum Requirements

Workstations running CTC Software Release 8.0 for the ONS products on Windows platforms need to have the following minimum requirements:

Pentium III or higher processor

Processor speed of at least 700 MHz

256 MB or more of RAM

50 MB or more of available hard disk space

20 GB or larger hard drive

1.8.2  Sun System Minimum Requirements

Workstations running Software R8.0 for the ONS products on Sun workstations need to have the following minimum requirements:

UltraSPARC or faster processor

256 MB or more of RAM

50 MB or more of available hard disk space

1.8.3  Supported Platforms, Browsers, and JREs

Software R8.0 supports the following platforms:

Windows NT

Windows 98

Windows XP

Windows 2000

Solaris 8

Solaris 9

Solaris 10

Software R8.0 CTC supports the following browsers and JREs:

Netscape 7 browser (on Solaris 8 or 9 with Java plug-in 1.4.2 or 5.0, or Solaris 10 with JRE 5.0)

PC platforms with Java plug-in 5.0

Internet Explorer 6.0 browser (on PC platforms with Java plug-in 5.0)

Mozilla application suite for browsers (Solaris only)


Note The supported browsers can be downloaded from the Web.



Note JRE 5.0 is required to run Software R8.0. JRE 5.0 is provided on the software CD.


1.8.4  Unsupported Platforms and Browsers

Software R8.0 does not support the following platforms:

Windows 95

Solaris 2.5

Solaris 2.6

Software R8.0 does not support the following browsers and JREs:

Netscape 4.73 for Windows.

Netscape 4.76 on Solaris is not supported.

Netscape 7 on Solaris 8 or 9 is only supported with JRE 1.4.2

1.8.5  Unable to Verify the IP Configuration of Your PC

Symptom    When connecting your PC to the ONS 15454 SDH, you are unable to successfully ping the IP address of your PC to verify the IP configuration.

Possible Cause    The IP address and/or subnet mask was typed incorrectly.

Recommended Action    Verify that the IP address used to ping the PC matches the IP address shown in the Windows IP Configuration information retrieved from the system. See "Verify the IP Configuration of Your PC" procedure.

Possible Cause    The IP configuration of your PC is not properly set.

Recommended Action    Verify the IP configuration of your PC. See the "Verify the IP Configuration of Your PC" procedure. If this procedure is unsuccessful, contact your Network Administrator for instructions to correct the IP configuration of your PC.

Verify the IP Configuration of Your PC


Step 1 Open a DOS command window by selecting Start > Run from the Start menu.

Step 2 In the Open field, type command and then click OK. The DOS command window appears.

Step 3 At the prompt in the DOS window, type one of the following appropriate commands:

For Windows 98, NT, 2000, and XP, type ipconfig and press the Enter key.


Note The winipcfg command only returns IP configuration information if you are on a network.


The Windows IP configuration information appears, including the IP address, the subnet mask, and the default gateway.

Step 4 At the prompt in the DOS window, type ping followed by the IP address shown in the Windows IP configuration information.

Step 5 Press the Enter key to execute the command.

If the DOS window returns multiple (usually four) replies, the IP configuration is working properly.

If you do not receive a reply, your IP configuration might not be properly set. Contact your Network Administrator for instructions to correct the IP configuration of your PC.


1.8.6  Browser Login Does Not Launch Java

Symptom    The message "Loading Java Applet" does not appear and the JRE does not launch during the initial login.

Possible Cause    The PC operating system and browser are not properly configured.

Recommended Action    Reconfigure the PC operating system java plug-in control panel and the browser settings. See the "Reconfigure the PC Operating System Java Plug-in Control Panel" procedure and the "Reconfigure the Browser" procedure.

Reconfigure the PC Operating System Java Plug-in Control Panel


Step 1 From the Windows start menu, click Settings > Control Panel.

Step 2 If the Java Plug-in Control Panel does not appear, the JRE might not be installed on your PC. Complete the following steps:

a. Run the Cisco ONS 15454 SDH software CD.

b. Open the CD drive:\Windows\JRE folder.

c. Double-click the j2re-1_4_2-win icon to run the JRE installation wizard.

d. Follow the JRE installation wizard steps.

Step 3 From the Windows start menu, click Settings > Control Panel.

Step 4 In the Java Plug-in Control Panel window, double-click the Java Plug-in 1.4.2 icon.

Step 5 Click the Advanced tab on the Java Plug-in Control Panel.

Step 6 From the Java Run Time Environment menu, select JRE 5.0 in C:\ProgramFiles\JavaSoft\JRE\5.0.

Step 7 Click Apply.

Step 8 Close the Java Plug-in Control Panel window.


Reconfigure the Browser


Step 1 From the Start Menu, launch your browser application.

Step 2 If you are using Netscape Navigator:

a. On the Netscape Navigator menu bar, click Edit > Preferences.

b. In the Preferences window, click the Advanced > Proxies categories.

c. In the Proxies window, click the Direct connection to the Internet check box and click OK.

d. On the Netscape Navigator menu bar, click Edit > Preferences.

e. In the Preferences window, click the Advanced > Cache categories.

f. Confirm that the Disk Cache Folder field shows one of the following paths:

For Windows 98/ME, C:\ProgramFiles\Netscape\Communicator\cache

For Windows NT/2000/XP, C:\ProgramFiles\Netscape\<username>\Communicator\cache

g. If the Disk Cache Folder field is not correct, click Choose Folder.

h. Navigate to the file listed in Step f, and click OK.

i. Click OK in the Preferences window and exit the browser.

Step 3 If you are using Internet Explorer:

a. On the Internet Explorer menu bar, click Tools > Internet Options.

b. In the Internet Options window, click the Advanced tab.

c. In the Settings menu, scroll down to Java (Sun) and click the Use Java 2 v1.4.2 for <applet> (requires restart) check box.

d. Click OK in the Internet Options window and exit the browser.

Step 4 Temporarily disable any virus-scanning software on the computer. See the "Browser Stalls When Downloading CTC JAR Files From TCC2/TCC2P Card" section.

Step 5 Verify that the computer does not have two network interface cards (NICs) installed. If the computer does have two NICs, remove one.

Step 6 Restart the browser and log on to the ONS 15454 SDH.


1.8.7  Unable to Verify the NIC Connection on Your PC

Symptom    When connecting your PC to the ONS 15454 SDH, you are unable to verify the NIC connection is working properly because the link LED is not illuminated or flashing.

Possible Cause    The c cable is not plugged in properly.

Recommended Action    Confirm both ends of the cable are properly inserted. If the cable is not fully inserted due to a broken locking clip, the cable should be replaced.

Possible Cause    The Category-5 cable is damaged.

Recommended Action    Ensure that the cable is in good condition. If in doubt, use a known-good cable. Often, cabling is damaged due to pulling or bending.

Possible Cause    Incorrect type of Category-5 cable is being used.

Recommended Action    If connecting an ONS 15454 SDH directly to your laptop/PC or a router, use a straight-through Category-5 cable. When connecting the ONS 15454 SDH to a hub or a LAN switch, use a crossover Category-5 cable. For details on the types of Category-5 cables, see the "1.11.2.2  Crimp Replacement LAN Cables" procedure.

Possible Cause    The NIC is improperly inserted or installed.

Recommended Action    If you are using a Personal Computer Memory Card International Association (PCMCIA)-based NIC, remove and insert the network interface card (NIC) to make sure the NIC is fully inserted. If the NIC is built into the laptop/PC, verify that the NIC is not faulty.

Possible Cause    The NIC is faulty.

Recommended Action    Confirm that the NIC is working properly. If you have no issues connecting to the network (or any other node), then the NIC should be working correctly. If you have difficulty connecting to the network (or any other node), then the NIC might be faulty and require replacement.

1.8.8  Verify PC Connection to the ONS 15454 SDH (ping)

Symptom    The TCP/IP connection was established and then lost, and a DISCONNECTED transient alarm appears on CTC.

Possible Cause    A lost connection between the PC and the ONS 15454 SDH.

Recommended Action    Use a standard ping command to verify the TCP/IP connection between the PC and the ONS 15454 SDH TCC2/TCC2P card. A ping command will work if the PC connects directly to the TCC2/TCC2P card or uses a LAN to access the TCC2/TCC2P card. See the "Ping the ONS 15454 SDH" procedure.

Ping the ONS 15454 SDH


Step 1 Open the command prompt:

a. If you are using a Microsoft Windows operating system, from the Start Menu choose Run, type command prompt in the Open field of the Run dialog box, and click OK.

b. If you are using a Sun Solaris operating system, from the Common Desktop Environment (CDE) click the Personal Application tab and click Terminal.

Step 2 For both the Sun and Microsoft operating systems, at the prompt type:

ping ONS-15454-SDH-IP-address
 
   

For example:

ping 192.1.0.2
 
   

Step 3 If the workstation has connectivity to the ONS 15454 SDH, the ping is successful and shows a reply from the IP address. If the workstation does not have connectivity, a "Request timed out" message appears.

Step 4 If the ping is successful, it demonstrates that an active TCP/IP connection exists. Restart CTC.

Step 5 If the ping is not successful, and the workstation connects to the ONS 15454 SDH through a LAN, check that the workstation's IP address is on the same subnet as the ONS node.

Step 6 If the ping is not successful and the workstation connects directly to the ONS 15454 SDH, check that the link light on the workstation's NIC is illuminated.


1.8.9  The IP Address of the Node is Unknown

Symptom    The IP address of the node is unknown and you are unable to log in.

Possible Cause    The node is not set to the default IP address.

Recommended Action    Leave one TCC2/TCC2P card in the shelf. Connect a PC directly to the remaining TCC2/TCC2P card and perform a hardware reset of the card. The TCC2/TCC2P card will transmit the IP address after the reset to enable you to capture the IP address for login. See the "Retrieve Unknown Node IP Address" procedure.

Retrieve Unknown Node IP Address


Step 1 Connect your PC directly to the active TCC2/TCC2P card Ethernet port on the faceplate.

Step 2 Start the Sniffer application on your PC.

Step 3 Perform a hardware reset by removing and reinserting (reseating) the active TCC2/TCC2P card.

Step 4 After the TCC2/TCC2P card completes reseating, it will broadcast its IP address. The Sniffer software on your PC will capture the IP address being broadcast.


1.9  CTC Operation Troubleshooting

This section contains troubleshooting procedures for CTC login or operation problems.

1.9.1  Unable to Launch CTC Help After Removing Netscape

Symptom    After removing Netscape and running CTC using Internet Explorer, you are unable to launch the CTC Help and receive an "MSIE is not the default browser" error message.

Possible Cause    Loss of association between browser and Help files.

Recommended Action    When the CTC software and Netscape are installed, the Help files are associated with Netscape by default. When you remove Netscape, the Help files are not automatically associated with Internet Explorer as the default browser. Reset Internet Explorer as the default browser so that CTC will associate the Help files to the correct browser. See the "Reset Internet Explorer as the Default Browser for CTC" procedure to associate the CTC Help files to the correct browser.

Reset Internet Explorer as the Default Browser for CTC


Step 1 Open the Internet Explorer browser.

Step 2 From the menu bar, click Tools > Internet Options. The Internet Options window appears.

Step 3 In the Internet Options window, click the Programs tab.

Step 4 Click the Internet Explorer should check to see whether it is the default browser check box.

Step 5 Click OK.

Step 6 Exit any and all open and running CTC and Internet Explorer applications.

Step 7 Launch Internet Explorer and open a new CTC session. You should now be able to access the CTC Help.


1.9.2  Unable to Change Node View to Network View

Symptom    When activating a large, multinode MS-SPRing, some of the nodes appear grayed out. Logging into the new CTC, you are unable to change node view to network view on any and all nodes, from any workstation. This is accompanied by an "Exception occurred during event dispatching: java.lang.OutOfMemoryError" in the java window.

Possible Cause    The large, multinode MS-SPRing requires more memory for the GUI environment variables.

Recommended Action    Reset the system or user CTC_HEAP environment variable to increase the memory limits. See the "Reset the CTC_HEAP Environment Variable for Windows" procedure or the "Reset the CTC_HEAP Environment Variable for Solaris" procedure to enable the CTC_HEAP variable change.


Note This problem typically affects large networks where additional memory is required to manage large numbers of nodes and circuits.


Reset the CTC_HEAP Environment Variable for Windows


Step 1 Exit any and all open and running CTC and Netscape applications.

Step 2 From the Windows Desktop, right-click My Computer and choose Properties in the shortcut menu.

Step 3 In the System Properties window, click the Advanced tab.

Step 4 Click Environment Variables to open the Environment Variables window.

Step 5 Click New in the User variables field or the System variables field.

Step 6 Type CTC_HEAP in the Variable Name field.

Step 7 Type 256 in the Variable Value field, and then click OK to create the variable.

Step 8 Click OK in the Environment Variables window to accept the changes.

Step 9 Click OK in the System Properties window to accept the changes.

Step 10 Restart the browser and CTC software.


Reset the CTC_HEAP Environment Variable for Solaris


Step 1 From the user shell window, end any CTC applications.

Step 2 End any Netscape applications.

Step 3 In the user shell window, set the environment variable to increase the heap size:

% setenv CTC_HEAP 256 
 
   

Step 4 Restart the browser and CTC software in the same user shell window.


1.9.3  Browser Stalls When Downloading CTC JAR Files From TCC2/TCC2P Card

Symptom    The browser stalls or hangs when downloading a CTC Java archive (JAR) file from the TCC2/TCC2P card.

Possible Cause    McAfee VirusScan software might be interfering with the operation. The problem occurs when the VirusScan Download Scan is enabled on McAfee VirusScan 4.5 or later.

Recommended Action    Disable the VirusScan Download Scan feature. See the "Disable the VirusScan Download Scan" procedure.

Disable the VirusScan Download Scan


Step 1 From the Windows Start menu, choose Programs > Network Associates > VirusScan Console.

Step 2 Double-click the VShield icon listed in the VirusScan Console dialog box.

Step 3 Click Configure on the lower part of the Task Properties window.

Step 4 Click the Download Scan icon on the left of the System Scan Properties dialog box.

Step 5 Uncheck the Enable Internet download scanning check box.

Step 6 Click Yes when the warning message appears.

Step 7 Click OK on the System Scan Properties dialog box.

Step 8 Click OK on the Task Properties window.

Step 9 Close the McAfee VirusScan window.


1.9.4  CTC Does Not Launch

Symptom    CTC does not launch, usually an error message appears before the login window appears.

Possible Cause    The Netscape browser cache might point to an invalid directory.

Recommended Action    Redirect the Netscape cache to a valid directory. See the "Redirect the Netscape Cache to a Valid Directory" procedure.

Redirect the Netscape Cache to a Valid Directory


Step 1 Launch Netscape.

Step 2 From the Edit menu, choose Preferences.

Step 3 In the Category column on the left side, expand the Advanced category and choose the Cache tab.

Step 4 Change your disk cache folder to point to the cache file location.

The cache file location is usually C:\ProgramFiles\Netscape\Users\yourname\cache. The yourname segment of the file location is often the same as the user name.


1.9.5  Slow CTC Operation or Login Problems

Symptom    You experience slow CTC operation or have problems logging into CTC.

Possible Cause    The CTC cache file might be corrupted or might need to be replaced.

Recommended Action    Delete the CTC cache file. This operation forces the ONS 15454 SDH to download a new set of JAR files to your computer hard drive. See the "Delete the CTC Cache File Automatically" procedure or the "Delete the CTC Cache File Manually" procedure.

Delete the CTC Cache File Automatically


Caution All running sessions of CTC must be closed before deleting the CTC cache. Deleting CTC cache can cause any CTC session running on this node to behave in an unexpected manner.


Step 1 Enter an ONS 15454 SDH IP address into the browser URL field. The initial browser window shows a Delete CTC Cache button.

Step 2 Close all open CTC sessions and browser windows. The PC operating system does not allow you to delete files that are in use.

Step 3 Click Delete CTC Cache on the initial browser window to clear the CTC cache. Figure 1-44 shows the Delete CTC Cache window.

Figure 1-44 Deleting the CTC Cache


Delete the CTC Cache File Manually


Caution All running sessions of CTC must be halted before deleting the CTC cache. Deleting CTC cache can cause any CTC running on this system to behave in an unexpected manner.


Step 1 To delete the JAR files manually, from the Windows Start menu choose Search > For Files or Folders.

Step 2 Enter ctc*.jar or cms*.jar in the Search for files or folders named field on the Search Results dialog box and click Search Now.

Step 3 Click the Modified column on the Search Results dialog box to find the JAR files that match the date when you downloaded the files from the TCC2/TCC2P card.

Step 4 Highlight the files and press the keyboard Delete key.

Step 5 Click Yes at the Confirm dialog box.


1.9.6  Node Icon is Gray on CTC Network View

Symptom    The CTC network view shows one or more node icons as gray in color and without a node name.

Possible Cause    Different CTC releases not recognizing each other.

Recommended Action    Correct the core version build as described in the "Different CTC Releases Do Not Recognize Each Other" section.

Possible Cause    A username/password mismatch.

Recommended Action    Correct the username and password as described in the "Username or Password Do Not Match" section.

Possible Cause    No IP connectivity between nodes.

Recommended Action    Usually accompanied by Ethernet-specific alarms. Verify the Ethernet connections as described in the "Ethernet Connections" section.

Possible Cause    A lost DCC connection.

Recommended Action    Usually accompanied by an "EOC" alarm on page 2-84. Clear the EOC alarm and verify the DCC connection as described in the "Clear the EOC Alarm" procedure.

1.9.7  CTC Cannot Launch Due to Applet Security Restrictions

Symptom    The error message "Unable to launch CTC due to applet security restrictions" appears after you enter the IP address in the browser window.

Possible Cause    You are logging into a node running CTC Software R4.0 or earlier. Releases before R4.1 require a modification to the java.policy file so that CTC JAR files can be downloaded to the computer. The modified java.policy file might not exist on the computer.

Recommended Action    Install the software CD for the release of the node you are logging into. Run the CTC Setup Wizard (double-click Setup.exe). Choose Custom installation, then choose the Java Policy option. For additional information, refer to the CTC installation information in the "Connect to the PC and Log Into the GUI" chapter in the Cisco ONS 15454 SDH Procedure Guide. If the software CD is not available, you must manually edit the java.policy file on your computer. See the "Manually Edit the java.policy File" procedure.

Manually Edit the java.policy File


Step 1 Search your computer for this file and open it with a text editor (Notepad or Wordpad).

Step 2 Verify that the end of this file has the following lines:

		// Insert this into the system-wide or a per-user java.policy file.
	// DO NOT OVERWRITE THE SYSTEM-WIDE POLICY FILE--ADD THESE LINES!
 
   
	grant codeBase "http://*/fs/LAUNCHER.jar" {
permission java.security.AllPermission;
	};
 
   

Step 3 If these five lines are not in the file, enter them manually.

Step 4 Save the file and restart Netscape.

CTC should now start correctly.

Step 5 If the error message is still reported, save the java.policy file as (.java.policy). On Win98/2000/XP PCs, save the file to the C:\Windows folder. On WinNT4.0 PCs, save the file to all of the user folders on that PC, for example, C:\Winnt\profiles\joeuser.


1.9.8  Java Runtime Environment Incompatible

Symptom    The CTC application does not run properly.

Possible Cause    The compatible Java 2 JRE is not installed.

Recommended Action    The JRE contains the Java virtual machine, runtime class libraries, and Java application launcher that are necessary to run programs written in the Java programming language. The ONS 15454 SDH CTC is a Java application. A Java application, unlike an applet, cannot rely completely on a web browser for installation and runtime services. When you run an application written in the Java programming language, you need the correct JRE installed. The correct JRE for each CTC software release is included on the Cisco ONS 15454 SDH software CD. See the "Launch CTC to Correct the Core Version Build" procedure. If you are running multiple CTC software releases on a network, the JRE installed on the computer must be compatible with the different software releases. Table 1-3 shows JRE compatibility with ONS 15454 SDH software releases.

Table 1-3 JRE Compatibility  

ONS Software Release
JRE 1.2.2 Compatible
JRE 1.3 Compatible
JRE 1.4 Compatible
JRE 1.4.2 Compatible 1
JRE 1.5 Compatible

ONS 15454 SDH Release 3.3

Yes

Yes

No

No

No

ONS 15454 SDH Release 3.4

No

Yes

No

No

No

ONS 15454 SDH Release 4.02

No

Yes

No

No

No

ONS 15454 SDH Release 4.1

No

Yes

No

No

No

ONS 15454 SDH Release 4.5

No

Yes

No

No

No

ONS 15454 SDH Release 4.6

No

Yes

Yes

No

No

ONS 15454 SDH Release 4.7

No

Yes

Yes

No

No

ONS 15454 SDH Release 5.0

No

Yes

Yes

Yes

No

ONS 15454 SDH Release 6.0

No

No

Yes

Yes

No

ONS 15454 SDH Release 7.0

No

No

No

Yes

Yes

ONS 15454 SDH Release 7.2

No

No

No

Yes

Yes

ONS 15454 SDH Release 8.0

No

No

No

No

Yes

1 JRE 1.4.2 is the recommended version and is provided on the software CD.

2 Software R4.0 will notify you if an older version JRE is running on your PC or UNIX workstation.


Launch CTC to Correct the Core Version Build


Step 1 Exit the current CTC session and completely close the browser.

Step 2 Start the browser.

Step 3 Type the ONS 15454 SDH IP address of the node that reported the alarm. This can be the original IP address you logged on with or an IP address other than the original.

Step 4 Log into CTC. The browser downloads the JAR file from CTC.


1.9.9  Different CTC Releases Do Not Recognize Each Other

Symptom    This situation is often accompanied by the INCOMPATIBLE-SW transient alarm.

Possible Cause    The software loaded on the connecting workstation and the software on the TCC2/TCC2P card are incompatible.

Recommended Action    This occurs when the TCC2/TCC2P card software is upgraded but the PC has not yet upgraded the compatible CTC JAR file. It also occurs on login nodes with compatible software that encounter other nodes in the network that have a newer software version. See the "Launch CTC to Correct the Core Version Build" procedure.


Note Remember to always log into the ONS node with the latest CTC core version first. If you initially log into an ONS node running a CTC core version of 2.2 or earlier and then attempt to log into another ONS node in the network running a later CTC core version, the earlier version node does not recognize the new node.


Launch CTC to Correct the Core Version Build


Step 1 Exit the current CTC session and completely close the browser.

Step 2 Start the browser.

Step 3 Type the ONS 15454 SDH IP address of the node that reported the alarm. This can be the original IP address you logged on with or an IP address other than the original.

Step 4 Log into CTC. The browser downloads the JAR file from CTC.


1.9.10  Username or Password Do Not Match

Symptom    A mismatch often occurs concurrently with a NOT-AUTHENTICATED transient alarm.

Possible Cause    The username or password entered do not match the information stored in the TCC2/TCC2P card.

Recommended Action    All ONS nodes must have the same username and password created to display every ONS node in the network. You can also be locked out of certain ONS nodes on a network if your username and password were not created on those specific ONS nodes. For initial login to the ONS 15454 SDH, enter the CISCO15 user name in capital letters and click Login and use the password "otbu+1," which is case-sensitive. See the "Verify Correct Username and Password" procedure. If the node has been configured for Radius authentication, the username and password are verified against the Radius server database rather than the security information in the local node database. For more information about Radius security, refer to the "Security" chapter in the Cisco ONS 15454 SDH Reference Manual.

Verify Correct Username and Password


Step 1 Ensure that your keyboard Caps Lock key is not turned on and affecting the case-sensitive entry of the username and password.

Step 2 Contact your system administrator to verify the username and password.

Step 3 Contact Cisco Technical Support to have them enter your system and create a new user name and password. Log into the Cisco Technical Support Website at http://www.cisco.com/techsupport for more information or log into http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco TAC numbers for your country.


1.9.11  No IP Connectivity Exists Between Nodes

Symptom    The nodes have a gray icon and is usually accompanied by alarms.

Possible Cause    A lost Ethernet connection.

Recommended Action    Usually accompanied by Ethernet-specific alarms. Verify the Ethernet connections as described in the "Ethernet Connections" section.

1.9.12  DCC Connection Lost

Symptom    The node is usually accompanied by alarms and the nodes in the network view have a gray icon. This symptom is usually accompanied by an EOC alarm.

Possible Cause    A lost DCC connection.

Recommended Action    Usually accompanied by an EOC alarm. Clear the EOC alarm and verify the DCC connection as described in the "EOC" section.

1.9.13  "Path in Use Error" When Creating a Circuit

Symptom    While creating a circuit, you get a "Path in Use" error that prevents you from completing the circuit creation.

Possible Cause    Another user has already selected the same source port to create another circuit.

Recommended Action    CTC does not remove a card or port from the available list until a circuit is completely provisioned. If two users simultaneously select the same source port to create a circuit, the first user to complete circuit provisioning gets use of the port. The other user will get the "Path in Use" error. Cancel the circuit creation and start over, or click the Back button until you return to the initial circuit creation window. The source port that was previously selected no longer appears in the available list because it is now part of a provisioned circuit. Select a different available port and begin the circuit creation process again.

1.9.14  Calculate and Design IP Subnets

Symptom    You cannot calculate or design IP subnets on the ONS 15454 SDH.

Possible Cause    The IP capabilities of the ONS 15454 SDH require specific calculations to properly design IP subnets.

Recommended Action    Cisco provides a free online tool to calculate and design IP subnets.
Go to http://www.cisco.com/pcgi-bin/Support/IpSubnet/home.pl.
For information about ONS 15454 SDH IP capability, refer to the "Management Network Connectivity" chapter in the Cisco ONS 15454 SDH Reference Manual.

1.9.15  Ethernet Connections

Symptom    Ethernet connections appear to be broken or are not working properly.

Possible Cause    Improperly seated connections.

Possible Cause    Incorrect connections.

Recommended Action    You can fix most connectivity problems in an Ethernet network by following a few guidelines. Refer to Figure 1-45 to complete the "Verify Ethernet Connections" procedure.

Figure 1-45 Ethernet Connectivity Reference

Verify Ethernet Connections


Step 1 Verify that the alarm filter is turned OFF.

Step 2 Check for SDH/FC_MR alarms on the VC that carries VLAN 1. Clear any alarms by looking them up in Chapter 2 "Alarm Troubleshooting."

Step 3 Check for Ethernet-specific alarms. Clear any raised alarms by looking up that alarm in Chapter 2 "Alarm Troubleshooting."

Step 4 Verify that the ACT LED on the Ethernet card is green.

Step 5 Verify that Ports 1 and 3 on Node 1 and Ports 1 and 2 on Node 2 have green link-integrity LEDs illuminated.

Step 6 If no green link-integrity LED is illuminated for any of these ports, complete the following substeps:

a. Verify physical connectivity between the node and the attached device.

b. Verify that the ports are enabled on the Ethernet cards.

c. Verify that you are using the proper Ethernet cable and that it is wired correctly, or replace the cable with a known-good Ethernet cable.

d. Check the status LED on the Ethernet card faceplate to ensure that the card booted up properly. This LED should be solid green. If necessary, remove and reinsert the card and allow it to reboot.

e. It is possible that the Ethernet port is functioning properly but the link LED itself is broken. Complete the procedures in the "Verify G-Series Ethernet or FC_MR Card LED Operation" section or the "Verify E-Series and ML-Series Ethernet Card LED Operation" section as appropriate.

Step 7 Verify connectivity between Device A and Device C by pinging between these locally attached devices (see the "1.8.8  Verify PC Connection to the ONS 15454 SDH (ping)" procedure). If the ping is unsuccessful:

a. Verify that Device A and Device C are on the same IP subnet.

b. Open the Ethernet card in CTC card view and click the Provisioning > VLAN tabs to verify that both Port 1 and Port 3 on the card are assigned to the same VLAN.

c. If a port is not assigned to the correct VLAN, click that port column in the VLAN row and set the port to Tagged or Untag.

d. Click Apply.

Step 8 Repeat Step 7 for Devices B and D.

Step 9 Verify that the Ethernet circuit that carries VLAN No. 1 is provisioned and that Node 1 and Node 2 ports also use VLAN 1.


1.9.16  VLAN Cannot Connect to Network Device from Untag Port

Symptom    Networks that have a VLAN with one ONS 15454 SDH Ethernet card port set to Tagged and one ONS 15454 SDH Ethernet card set to Untag might have difficulty implementing Address Resolution Protocol (ARP) for a network device attached to the Untag port (Figure 1-46). There might also be a higher than normal runt packets count at the network device attached to the Untag port. This symptom/limitation also exists when ports within the same card or ports within the same chassis are put on the same VLAN, with a mix of tagged and untagged.

Possible Cause    The Tagged ONS 15454 SDH adds the IEEE 802.1Q tag and the Untag ONS 15454 SDH removes the Q-tag without replacing the bytes. The NIC of the network device categorizes the packet as a runt and drops the packet.

Possible Cause    Dropped packets can also occur when ARP attempts to match the IP address of the network device attached to the Untag port with the physical MAC address required by the network access layer.

Recommended Action    Set both ports in the VLAN to Tagged to stop the stripping of the 4 bytes from the data packet and prevent the NIC card in the network access device from recognizing the packet as a runt and dropping it. Network devices with NIC cards that are not IEEE 802.1Q-compliant accept the tagged packets. Network devices with NIC cards that are not IEEE 802.1Q compliant still drop these tagged packets. You might need to upgrade network devices with NIC cards that are not IEEE 802.1Q compliant to IEEE 802.1Q-compliant NIC cards. You can also set both ports in the VLAN to Untag, but you lose IEEE 802.1Q compliance.

Figure 1-46 VLAN With Ethernet Ports at Tagged and Untag

Change VLAN Port Tagged and Untag Settings


Step 1 In node view, double-click the Ethernet card involved in the problem VLAN. The card view appears.

Step 2 Click the Provisioning > VLAN tabs (Figure 1-47).

Figure 1-47 Configuring VLAN Membership for Individual Ethernet Ports

Step 3 If the port is set to Tagged, continue to look at other cards and their ports in the VLAN until you find the port that is set to Untag.

Step 4 At the VLAN port set to Untag, click the port and choose Tagged.


Note The attached external devices must recognize IEEE 802.1Q VLANs.


Step 5 After each port is in the appropriate VLAN, click Apply.


1.10  Circuits and Timing

This section provides solutions to circuit creation and reporting errors, as well as to common timing reference errors and alarms.

1.10.1  STM-N Circuit Transitions to Partial State

Symptom    An automatic or manual transition of a circuit from one state to another results in the OOS-PARTIAL status. At least one of the connections in the circuit is in the Unlocked-enabled service state, and at least one other connection in the circuit is in the Locked-enabled,maintenance; Locked-enabled,disabled; or Unlocked-disabled,automaticInService service state.

Possible Cause    During a Manual transition, CTC cannot communicate with one of the nodes, or one of the nodes is on a version of software that does not support the new state model.

Recommended Action    Repeat the Manual transition operation. If the PARTIAL status persists, determine which node in the circuit is not changing to the desired state. Refer to the "View the State of Circuit Nodes" procedure. Log onto the circuit node that did not change to the desired state and determine the software version.


Note If the node software cannot be upgraded to R8.0, the PARTIAL status condition can be avoided by only using the circuit state(s) supported in the earlier software version.


Possible Cause    During an automatic transition, some path-level defects and/or alarms were detected on the circuit.

Possible Cause    One end of the circuit is not properly terminated.

Recommended Action    Determine which node in the circuit is not changing to the desired state. Refer to the "View the State of Circuit Nodes" procedure. Log onto the circuit node that did not change to the desired state and examine the circuit for path-level defects, improper circuit termination, or alarms. Refer to the "Manage Alarms" chapter in the Cisco ONS 15454 SDH Procedure Guide for procedures to clear alarms and change circuit configuration settings. Resolve and clear the defects and/or alarms on the circuit node and verify that the circuit transitions to the desired state.

View the State of Circuit Nodes


Step 1 Click the Circuits tab.

Step 2 From the Circuits tab list, select the circuit with the OOS-PARTIAL status condition.

Step 3 Click Edit. The Edit Circuit window appears.

Step 4 In the Edit Circuit window, click the State tab.

The State tab window lists the Node, CRS End A, CRS End B, and CRS State for each of the nodes in the circuit.


1.10.2  DS3i-N-12 Card Does Not Report MS-AIS From External Equipment

Symptom    A DS3i-N-12 card does not report MS-AIS from the external equipment/line side.

Possible Cause    The card is functioning as designed.

Recommended Action    This card terminates the port signal at the backplane, so VC MS-AIS is not reported from the external equipment/line side. DS3i-N-12 cards have DS3 header monitoring functionality, which allows you to view PMs on the DS3 path. Nevertheless, you cannot view MS-AIS on the VC path. For more information on the PM capabilities of the DS3i-N-12 cards, refer to the "Electrical Cards" chapter in the Cisco ONS 15454 SDH Reference Manual.

1.10.3  STM-1 and DCC Limitations

Symptom    Limitations to STM-1 and DCC usage.

Possible Cause    STM-1 and DCC have limitations for the ONS 15454 SDH.

Recommended Action    For an explanation of STM-1 and DCC limitations, refer to the "Turn Up Network" chapter in the Cisco ONS 15454 SDH Procedure Guide.

1.10.4  ONS 15454 SDH Switches Timing Reference

Symptom    Timing references switch when one or more problems occur.

Possible Cause    The optical or BITS input is receiving loss of signal (LOS), loss of frame (LOF), or AIS alarms from its timing source.

Possible Cause    The optical or BITS input is not functioning.

Possible Cause    Sync Status Messaging (SSM) message is set to Do Not Use for Synchronization (DUS).

Possible Cause    The synchronous status messaging (SSM) indicates a Stratum 3 or lower clock quality.

Possible Cause    The input frequency is off by more than 15 ppm.

Possible Cause    The input clock wanders and has more than three slips in 30 seconds.

Possible Cause    A bad timing reference existed for at least two minutes.

Recommended Action    The ONS 15454 SDH internal clock operates at a Stratum 3E level of accuracy. This gives the ONS 15454 SDH a free-running synchronization accuracy of +/- 4.6 ppm and a holdover stability of less than 255 slips in the first 24 hours or 3.7 x 10-7/day, including temperature. ONS 15454 SDH free-running synchronization relies on the Stratum 3 internal clock. Over an extended time period, using a higher quality Stratum 1 or Stratum 2 timing source results in fewer timing slips than a lower quality Stratum 3 timing source.

1.10.5  Holdover Synchronization Alarm

Symptom    The clock is running at a different frequency than normal and the holdover synchronization (HLDOVRSYNC) condition appears.

Possible Cause    The last reference input has failed.

Recommended Action    The clock is running at the frequency of the last known-good reference input. This alarm is raised when the last reference input fails. See the "HLDOVRSYNC" alarm on page 2-127 for a detailed description of this alarm.


Note The ONS 15454 SDH supports holdover timing per the ITU when provisioned for external (BITS) timing.


1.10.6  Free-Running Synchronization Mode

Symptom    The clock is running at a different frequency than normal and the free-running synchronization (FRNGSYNC) condition appears.

Possible Cause    No reliable reference input is available.

Recommended Action    The clock is using the internal oscillator as its only frequency reference. This occurs when no reliable, prior timing reference is available. See the "FRNGSYNC" condition, page 2-117 for a detailed description of this condition.

1.10.7  Daisy-Chained BITS Not Functioning

Symptom    You are unable to daisy-chain the BITS sources.

Possible Cause    Daisy-chained BITS sources are not supported on the ONS 15454 SDH.

Recommended Action    Daisy-chained BITS causes additional wander buildup in the network and is therefore not supported. Instead, use a timing signal generator to create multiple copies of the BITS clock and separately link them to each ONS 15454 SDH.

1.10.8  Blinking STAT LED after Installing a Card

Symptom    After installing a card, the STAT LED blinks continuously for more than 60 seconds.

Possible Cause    The card cannot boot because it failed the Power On Shelf Test (POST) diagnostics.

Recommended Action    The blinking STAT LED indicates that POST diagnostics are being performed. If the LED continues to blink more than 60 seconds, the card has failed the POST diagnostics test and has failed to boot. If the card has truly failed, an EQPT alarm is raised against the slot number with an "Equipment Failure" description. Check the alarm tab for this alarm to appear for the slot where the card was installed. To attempt recovery, remove and reinstall the card and observe the card boot process. If the card fails to boot, replace the card. Complete the "Physically Replace a Traffic Card" procedure.


Caution Removing an active card can cause a traffic hit. To avoid this, perform an external switch if a switch has not already occurred. See the "Protection Switching, Lock Initiation, and Clearing" section for basic instructions. For detailed information, refer to the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide.

1.10.9  Circuits Remain in PARTIAL Status

Symptom    Circuits remain in the PARTIAL status.

Possible Cause    The MAC address changed.

Recommended Action    Repair the circuits. See the "1.10.9.1  Repair Circuits" procedure.

1.10.9.1  Repair Circuits


Step 1 In node view, click the Circuits tab. Note that all circuits listed are PARTIAL.

Step 2 In node view, choose Repair Circuits from the Tools drop-down list. The Circuit Repair dialog box appears.

Step 3 Read the instructions in the Circuit Repair dialog box. If all the steps in the dialog box have been completed, click Next. Ensure that you have the old and new MAC addresses.

Step 4 The Node MAC Addresses dialog box appears:

a. From the Node drop-down list, choose the name of the node where you replaced the AIE.

b. In the Old MAC Address field, enter the old MAC address.

c. Click Next.

Step 5 The Repair Circuits dialog box appears. Read the information in the dialog box and click Finish.


Note The CTC session freezes until all circuits are repaired. Circuit repair can take up to five minutes or more depending on the number of circuits provisioned.


When the circuit repair is complete, the Circuits Repaired dialog box appears.

Step 6 Click OK.

Step 7 In the node view of the new node, click the Circuits tab. Note that all circuits listed are DISCOVERED. If all circuits listed do not have a DISCOVERED status, call the Cisco TAC (1-800-553-2447) to open a Return Material Authorization (RMA).


1.11  Fiber and Cabling

This section explains problems typically caused by cabling connectivity errors. It also includes instructions for crimping CAT-5 cable and lists the optical fiber connectivity levels.

1.11.1  Bit Errors Appear for a Traffic Card

Symptom    A traffic card has multiple bit errors.

Possible Cause    Faulty cabling or low optical-line levels.

Recommended Action    Bit errors on line (traffic) cards usually originate from cabling problems or low optical-line levels. The errors can be caused by synchronization problems, especially if (pointer justification (PJ) errors are reported. Moving cards into different error-free slots will isolate the cause. Use a test set whenever possible because the cause of the errors could be external cabling, fiber, or external equipment connecting to the ONS 15454 SDH. Troubleshoot cabling problems using the "Troubleshooting Circuit Paths with Loopbacks" section. Troubleshoot low optical levels using the "Faulty Fiber-Optic Connections" section.

1.11.2  Faulty Fiber-Optic Connections

Symptom    A line card has multiple SDH alarms and/or signal errors.

Possible Cause    Faulty fiber-optic connections.

Recommended Action    Faulty fiber-optic connections can be the source of SDH alarms and signal errors. See the "1.11.2.1  Verify Fiber-Optic Connections" procedure.

Possible Cause    Faulty Category-5 cables.

Recommended Action    Faulty Category-5 cables can be the source of SDH alarms and signal errors. See the "1.11.2.2  Crimp Replacement LAN Cables" procedure.

Possible Cause    Faulty GBICs.

Recommended Action    Faulty GBICs can be the source of SDH alarms and signal errors. See the "1.11.2.3  Replace Faulty GBIC or SFP Connectors" procedure.


Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 272

Warning Laser radiation presents an invisible hazard, so personnel should avoid exposure to the laser beam. Personnel must be qualified in laser safety procedures and must use proper eye protection before working on this equipment. Statement 300

1.11.2.1  Verify Fiber-Optic Connections


Step 1 Ensure that a single-mode fiber connects to the ONS 15454 SDH optical card.

SM or SM Fiber should be printed on the fiber span cable. ONS 15454 SDH optical cards do not use multimode fiber.

Step 2 Ensure that the connector keys on the SC fiber connector are properly aligned and locked.

Step 3 Check that the single-mode fiber power level is within the specified range:

a. Remove the receive end of the suspect fiber.

b. Connect the receive end of the suspect fiber to a fiber-optic power meter, such as a GN Nettest LP-5000.

c. Determine the power level of fiber with the fiber-optic power meter.

d. Verify the power meter is set to the appropriate wavelength for the optical card being tested (either 1310 nm or 1550 nm depending on the specific card).

e. Verify that the power level falls within the range specified for the card; see the "Optical Card Transmit and Receive Levels" section.

Step 4 If the power level falls below the specified range:

a. Clean or replace the fiber patchcords. Clean the fiber according to site practice or, if none exists, follow the procedure in the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide. If possible, do this for the optical card you are working on and the far-end card.

b. Clean the optical connectors on the card. Clean the connectors according to site practice or, if none exists, follow the procedure in the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide. If possible, do this for the optical card you are working on and the far-end card.

c. Ensure that the far-end transmitting card is not an ONS 15454 SDH IR card when an ONS 15454 SDH LR card is appropriate.IR cards transmit a lower output power than LR cards.

d. Replace the far-end transmitting optical card to eliminate the possibility of a degrading transmitter on this optical card.


Caution Removing an active card can cause a traffic hit. To avoid this, perform an external switch if a switch has not already occurred. See the "Protection Switching, Lock Initiation, and Clearing" section for basic instructions. For detailed information, refer to the "Maintain the Node" chapter in the Cisco ONS 15454 SDH Procedure Guide.

e. If the power level still falls below the specified range with the replacement fibers and replacement card, check for one of these three factors that attenuate the power level and affect link loss (LL):

Excessive fiber distance; single-mode fiber attenuates at approximately 0.5 dB/km.

Excessive number or fiber connectors; connectors take approximately 0.5 dB each.

Excessive number of fiber splices; splices take approximately 0.5 dB each.


Note These are typical attenuation values. Refer to the specific product documentation for the actual values or use an optical time domain reflectometer (OTDR) to establish precise link loss and budget requirements.


Step 5 If no power level shows on the fiber, the fiber is bad or the transmitter on the optical card failed.

a. Check that the transmit and receive fibers are not reversed. LOS and EOC alarms normally accompany reversed transmit and receive fibers. Switching reversed transmit and receive fibers clears the alarms and restores the signal.

b. Clean or replace the fiber patchcords. Clean the fiber according to site practice or, if none exists, follow the procedure in the "Maintain the Node" chapter of the Cisco ONS 15454 SDH Procedure Guide. If possible, do this for the optical card you are working on and the far-end card.

c. Retest the fiber power level.

d. If the replacement fiber still shows no power, replace the optical card.

Step 6 If the power level on the fiber is above the range specified for the card, ensure that an ONS 15454 SDH LR card is not being used when an ONS 15454 SDH IR card is appropriate.

LR cards transmit a higher output power than IR cards. When used with short runs of fiber, an LR transmitter is be too powerful for the receiver on the receiving optical card.

Receiver overloads occur when maximum receiver power is exceeded.


Tip To prevent overloading the receiver, use an attenuator on the fiber between the ONS 15454 SDH optical card transmitter and the receiver. Place the attenuator on the receive transmitter of the ONS 15454 SDH optical cards. Refer to the attenuator documentation for specific instructions.



Tip Most fiber has text printed on only one of the two fiber strands. Use this to identify which fiber is connected to transmit and which fiber is connected to receive.



1.11.2.2  Crimp Replacement LAN Cables

You can crimp your own LAN cables for use with the ONS 15454 SDH.

Use Category-5 cable RJ-45 T-568B, Color Code (100 Mbps) and a crimping tool. Use a cross-over cable when connecting an ONS 15454 SDH to a hub, LAN modem, or switch, and use a LAN cable when connecting an ONS 15454 SDH to a router or workstation.

Figure 1-48 shows the layout of an RJ-45 connector.

Figure 1-48 RJ-45 Pin Numbers

Figure 1-49 shows a LAN cable layout.

Figure 1-49 LAN Cable Layout

Table 1-4 provides the LAN cable pinouts.

Table 1-4 LAN Cable Pinout 

Pin
Color
Pair
Name
Pin

1

white/orange

2

Transmit Data +

1

2

orange

2

Transmit Data -

2

3

white/green

3

Receive Data +

3

4

blue

1

4

5

white/blue

1

5

6

green

3

Receive Data -

6

7

white/brown

4

7

8

brown

4

8


Figure 1-50 shows a cross-over cable layout.

Figure 1-50 Cross-Over Cable Layout

Table 1-5 provides cross-over cable pinouts.

Table 1-5 Cross-Over Cable Pinout 

Pin
Color
Pair
Name
Pin

1

white/orange

2

Transmit Data +

3

2

orange

2

Transmit Data -

6

3

white/green

3

Receive Data +

1

4

blue

1

4

5

white/blue

1

5

6

green

3

Receive Data -

2

7

white/brown

4

7

8

brown

4

8



Note Odd-numbered pins always connect to a white wire with a colored stripe.


1.11.2.3  Replace Faulty GBIC or SFP Connectors

GBICs and SFPs are hot-swappable and can be installed or removed while the card or shelf assembly is powered and running.


Warning Class 1 laser product. Statement 1008

Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051

GBICs and SFPs are input/output devices that plug into a Gigabit Ethernet card or MXP card to link the port with the fiber-optic network. The type of GBIC or SFP determines the maximum distance that the Ethernet traffic can travel from the card to the next network device.


Note GBICs and SFPs must be matched on either end by type: SX to SX, LX to LX, or ZX to ZX.


GBICs are available in two different models. One GBIC model has two clips (one on each side of the GBIC) that secure the GBIC in the slot on the E1000-2-G or G-Series card. The other model has a locking handle. Both models are shown in Figure 1-51.

Figure 1-51 Gigabit Interface Converters

For a list of available GBICs and SFPs for Ethernet cards and FC_MR cards, refer to the "Ethernet Cards" chapter in the Cisco ONS 15454 SDH Reference Manual.


Note The GBICs are very similar in appearance. Check the GBIC label carefully before installing it.


Remove GBIC or SFP Connectors


Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051

Step 1 Disconnect the network fiber cable from the GBIC SC connector or SFP LC duplex connector.

Step 2 Release the GBIC or SFP from the slot by simultaneously squeezing the two plastic tabs on each side.

Step 3 Slide the GBIC or SFP out of the Gigabit Ethernet module slot. A flap closes over the GBIC or SFP slot to protect the connector on the Gigabit Ethernet card.

Step 4 To replace a GBIC, see the "Install a GBIC with Clips" procedure or the "Install a GBIC with a Handle" procedure. To replace an SFP, see the "Install an SFP" procedure.


Install a GBIC with Clips


Step 1 Remove the GBIC from its protective packaging.

Step 2 Check the label to verify that the GBIC is the correct type (SX, LX, or ZX) for your network.

Step 3 Verify that you are installing compatible GBICs; for example, SX to SX, LX to LX, or ZX to ZX.

Step 4 Grip the sides of the GBIC with your thumb and forefinger and insert the GBIC into the slot on the E1000-2, E1000-2-G, or G-Series card (Figure 1-52).


Note GBICs are keyed to prevent incorrect installation.


Figure 1-52 GBIC Installation With Clips

Step 5 Slide the GBIC through the flap that covers the opening until you hear a click. The click indicates the GBIC is locked into the slot.

Step 6 When you are ready to attach the network fiber-optic cable, remove the protective plug from the GBIC and save the plug for future use.


Install a GBIC with a Handle


Step 1 Remove the GBIC from its protective packaging.

Step 2 Check the label to verify that the GBIC is the correct type (SX, LX, or ZX) for your network.

Step 3 Verify that you are installing compatible GBICs; for example, SX to SX, LX to LX, or ZX to ZX.

Step 4 Remove the protective plug from the SC-type connector.

Step 5 Grip the sides of the GBIC with your thumb and forefinger and insert the GBIC into the slot on the E1000-2-G or G-Series card.


Note GBICs are keyed to prevent incorrect installation.


Step 6 Lock the GBIC into place by closing the handle down. The handle is in the correct closed position when it does not obstruct access to SC-type connector.


Install an SFP


Step 1 Remove the SFP from its protective packaging.

Step 2 Check the label to verify that the SFP is the correct type for your network.

Step 3 Plug the LC duplex connector of the fiber into a Cisco-supported SFP.

Step 4 If the new SFP has a latch, close the latch over the cable to secure it.

Step 5 Plug the cabled SFP into the card port until it clicks.


1.11.3  Optical Card Transmit and Receive Levels

Each STM-N card has a transmit and receive connector on its faceplate. The transmit and receive levels for each card are listed in Table 1-6.


Note The levels for the 15454_MRC-12, OC192SR1/STM64IO Short Reach, and OC192/STM64 Any Reach (OC192-XFP) cards are dependent on the particular SFP/XFP installed in a port. The SFPs/XFPs are shown in parentheses in Table 1-6 for these cards.


Table 1-6 Optical Card Transmit and Receive Levels 

Card
Transmit
Receive
Minimum
Maximum
Minimum
Maximum

OC3 IR 4/STM1 SH 1310

-15 dBm

-8 dBm

-28 dBm

-8 dBm

OC3IR/STM1SH 1310-8

-15 dBm

-8 dBm

-28 dBm

-8 dBm

OC12 IR/STM4 SH 1310

-15 dBm

-8 dBm

-28 dBm

-8 dBm

OC12 LR/STM4 LH 1310

-3 dBm

+2 dBm

-28 dBm

-8 dBm

OC12 LR/STM4 LH 1550

-3 dBm

+2 dBm

-28 dBm

-8 dBm

OC12 IR/STM4 SH 1310-4

-15 dBm

-8 dBm

-30 dBm

-8 dBm

OC48 IR/STM16 SH AS 1310

-5 dBm

0 dBm

-18 dBm

0 dBm

OC48 LR/STM16 LH AS 1550

-2 dBm

+3 dBm

-28 dBm

-8 dBm

OC48 ELR/STM16 EH 100 GHz

-2 dBm

0 dBm

-27 dBm at 1E-12 BER

-9 dBm

OC192 SR/STM64 IO 1310

-6 dBm

-1 dBm

-11 dBm

-1 dBm

OC192 IR/STM64 SH 1550

-1 dBm

+2 dBm

-14 dBm

-1 dBm

OC192 LR/STM64 LH 1550

+7 dBm

+10 dBm

-19 dBm

-10 dBm

OC192 LR/STM64 LH ITU 15xx.xx

+3 dBm

+6 dBm

-22 dBm

-9 dBm

15454_MRC-121 (ONS-SI-2G-S1)

-10 dBm

-3 dBm

-18 dBm

-3 dBm

15454_MRC-121 (ONS-SI-2G-I1)

-5 dBm

0 dBm

-18 dBm

0 dBm

15454_MRC-121 (ONS-SI-2G-L1)

-2 dBm

3 dBm

-27 dBm

-9 dBm

15454_MRC-121 (ONS-SI-2G-L2)

-2 dBm

3 dBm

-28 dBm

-9 dBm

15454_MRC-121 (ONS-SC-2G-30.3 through ONS-SC-2G-60.6)

0 dBm

4 dBm

-28 dBm

-9 dBm

15454_MRC-121 (ONS-SI-622-I1)

-15 dBm

-8 dBm

-28 dBm

-8 dBm

15454_MRC-121 (ONS-SI-622-L1)

-3 dBm

2 dBm

-28 dBm

-8 dBm

15454_MRC-121 (ONS-SI-622-L2)

-3 dBm

2 dBm

-28 dBm

-8 dBm

15454_MRC-121 (ONS-SE-622-1470 through ONS-SE-622-1610)

0 dBm

5 dBm

-28 dBm

-3 dBm

15454_MRC-121 (ONS-SI-155-I1)

-15 dBm

-8 dBm

-30 dBm

-8 dBm

15454_MRC-121 (ONS-SI-155-L1)

-5 dBm

0 dBm

-34 dBm

-10 dBm

15454_MRC-121 (ONS-SI-155-L2)

-5 dBm

0 dBm

-34 dBm

-10 dBm

15454_MRC-121 (ONS_SE-155-1470 through ONS-SE-155-1610)

0 dBm

5 dBm

-34 dBm

-3 dBm

15454_MRC_121
ONS-SI-155-I1-MM=

-9 dBm

-14 dBm

-14 dBm

-5 dBm

15454_MRC_121
ONS-SI-622-I1-MM=

-9 dBm

-14 dBm

-14 dBm

-5 dBm

15454_MRC_121
ONS-SC-Z3-1470 through ONS-SC-Z3-1610

0 dBm

5 dBm

-9 dBm

 

15454_MRC_121
ONS-SE-Z1=

-5 dBm

0 dBm

-10 dBm
0 dBm
-18 dBm
0 dBm
0 dBm

-23 dBm (OC-3)
-23 dBm (OC-12)
0 dBm (OC-48)
-21 dBm (FC)
-22 dBm (GE)

OC192SR1/STM64IO Short Reach2 (ONS-XC-10G-S1)

-6 dBm

-1 dBm

-11 dBm

-1 dBm

OC192/STM64 Any Reach2 (ONS-XC-10G-S1)

-6 dBm

-1 dBm

-11 dBm

-1 dBm

OC192/STM64 Any Reach2 (ONS-XC-10G-I2)

-1 dBm

2 dBm

-14 dBm

2 dBm

OC192/STM64 Any Reach2 (ONS-XC-10G-L2)

0 dBm

4 dBm

-24 dBm

-7dBm

1 Designated as MRC-12 in CTC

2 Designated as STM64-XFP in CTC


1.12  Power Supply Problems

Symptom    Loss of power or low voltage, resulting in a loss of traffic and causing the LCD clock to reset to the default date and time.

Possible Cause    Loss of power or low voltage.

Possible Cause    Improperly connected power supply.

Recommended Action    The ONS 15454 SDH requires a constant source of DC power to properly function. Input power is -48 VDC. Power requirements range from -42 VDC to -57 VDC. A newly installed ONS 15454 SDH that is not properly connected to its power supply does not operate. Power problems can be confined to a specific ONS 15454 SDH or affect several pieces of equipment on the site. A loss of power or low voltage can result in a loss of traffic and causes the LCD clock on the ONS 15454 SDH to default to January 1, 1970, 00:04:15. To reset the clock, in node view click the Provisioning > General > General tabs and change the Date and Time fields. See the "Isolate the Cause of Power Supply Problems" procedure.


Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. Statement 94

Caution Operations that interrupt power supply or short the power connections to the ONS 15454 SDH are service-affecting.

Isolate the Cause of Power Supply Problems


Step 1 If a single ONS 15454 SDH show signs of fluctuating power or power loss:

a. Verify that the -48 VDC #8 power terminals are properly connected to a fuse panel. These power terminals are located on the lower section of the backplane FMEC card under the clear plastic cover.

b. Verify that the power cable is #12 or #14 AWG and in good condition.

c. Verify that the power cable connections are properly crimped. Stranded #12 or #14 AWG does not always crimp properly with Staycon type connectors.

d. Verify that 20 A fuses are used in the fuse panel.

e. Verify that the fuses are not blown.

f. Verify that a rack-ground cable attaches to the frame-ground terminal (FGND) on the ONS 15454 SDH FMEC. Connect this cable to the ground terminal according to local site practice.

g. Verify that the DC power source has enough capacity to carry the power load.

h. If the DC power source is battery-based:

Check that the output power is high enough. Power requirements range from -42 VDC to -57 VDC.

Check the age of the batteries. Battery performance decreases with age.

Check for opens and shorts in batteries, which might affect power output.

If brownouts occur, the power load and fuses might be too high for the battery plant.

Step 2 If multiple pieces of site equipment show signs of fluctuating power or power loss:

a. Check the uninterruptible power supply (UPS) or rectifiers that supply the equipment. Refer to the UPS manufacturer's documentation for specific instructions.

b. Check for excessive power drains caused by other equipment, such as generators.

c. Check for excessive power demand on backup power systems or batteries, when alternate power sources are used.


1.12.1  Power Consumption for Node and Cards

Symptom    You are unable to power up a node or the cards in a node.

Possible Cause    Improper power supply.

Recommended Action    Refer to power information in the "Hardware Specifications" appendix of the Cisco ONS 15454 SDH Reference Manual.