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Cisco IOS Software Releases 12.0 S

2-port STM-1/OC-3 Channelized E1/T1 Line Card for Cisco 12000 Series Internet Routers

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2-port STM-1/OC-3 Channelized E1/T1 Line Card for Cisco 12000 Series Internet Routers

Table Of Contents

2-port STM-1/OC-3 Channelized E1/T1 Line Card for Cisco 12000 Series Internet Routers

Feature Overview

SDH STM-1 Multiplexing Hierarchy

SONET OC-3 Multiplexing Hierarchy

Benefits

Restrictions

Related Features and Technologies

Related Documents

Supported Platforms

Supported Standards, MIBs, and RFCs

Configuration Tasks

Configuring the SONET Controller

Configuring STS-1 Path Attributes under SONET Framing

Configuring the Mode of Operation

Configuring T3 Links Under SONET Framing

Configuring T1 Links Under SONET Framing

Configuring an Interface under SONET Framing

Configuring Administrative Unit Group (AUG) Mapping under SDH Framing

Configuring an AU-3

Configuring a TUG-3 under AU-4 AUG Mapping

Verifying Operation

Monitoring and Maintaining Operation

Using clear Commands on Serial Interfaces

Using Loopbacks

Using BER Tests

Configuration Examples

Configuring for SONET Framing and CT3 Mode of Operation

Configuring for SONET Framing and VT1.5 Mode of Operation

Configuring for SDH Framing with AU-4 AUG Mapping

Command Reference

au-3

au-4 tug-3

aug mapping

clear counters serial

clear interface serial

clock source (controller)

controller sonet

framing (controller)

loopback (controller)

mode

overhead c2

overhead j0

overhead j1

overhead s1s0

report

show controllers sonet

show interfaces serial

sts-1

t1 bert pattern

t1 channel-group timeslots

t1 clock source

t1 fdl ansi

t1 framing

t1 loopback

t3 clock source

t3 equipment loopback

t3 framing

t3 loopback

threshold

tug-2 e1 bert pattern

tug-2 e1 channel-group timeslots

tug-2 e1 clock source

tug-2 e1 framing

tug-2 e1 loopback

tug-2 e1 national bits

tug-2 e1 unframed

Glossary


2-port STM-1/OC-3 Channelized E1/T1 Line Card for Cisco 12000 Series Internet Routers


This feature module describes the Two-port STM-1/OC-3 Channelized E1/T1 line card and its use in the Cisco 12000 series Internet Routers.

This document includes information on the following topics:

Feature Overview

Supported Platforms

Supported Standards, MIBs, and RFCs

Configuration Tasks

Monitoring and Maintaining Operation

Configuration Examples

Command Reference

Glossary

Feature Overview

The Two-port STM-1/OC-3 Channelized E1/T1 line card provides E1/DS1 aggregation for the Cisco 12000 series Internet Router. The Two-port STM-1/OC-3 Channelized E1/T1 line card interfaces with the 12000 series Internet Router switch fabric and provides two OC-3/STM-1 duplex SC single-mode intermediate-reach optical interfaces.

When configured for operation in a Synchronous Digital Hierarchy (SDH) environment, each STM-1 port is capable of supporting channelization into either 63 independent E1s through VC-12 ETSI mapping, or 84 J1 (Japanese T1 equivalent) channels through VC-11 ANSI mapping.

When configured for operation in a Synchronous Optical Network (SONET) environment, each OC-3 port is capable of supporting channelization into 84 independent DS1 (VT1.5 mapping or CT3 mapping into STS-1) channels.

Fractional E1 and individual 64 kbps channels can also be configured, up to the limit of 105 channel definitions per STM-1 (35 per TUG-3). Fractional T1 and individual DS0 channels can also be configured, up to the limit of 35 channel definitions per STS-1 (210 per line card).

Each Two-port STM-1/OC-3 Channelized E1/T1 line card supports up to 126 E1s when configured for SDH operation, 168 DS1 connections when configured for SONET operation, or any combination of 64 kbps/DS0, fractional E1/T1, or E1/T1 interface definitions, up to the limit of 210 per line card.

SDH STM-1 Multiplexing Hierarchy

Figure 1 illustrates the SDH STM-1 multiplexing hierarchy supported on the Two-port STM-1/OC-3 Channelized E1/T1 line card. The multiplexing hierarchy is the ITU-T SDH multiplexing hierarchy defined in ITU-T G.707.

Figure 1 SDH STM-1 Multiplexing Hierarchy

At the lowest level, PDH signals are mapped into containers (C). The mapping process uses bit stuffing to generate synchronous containers with a common bit rate. Overhead bytes are then added to create virtual containers (VCs). The VCs are then aligned into tributary units (TUs) where pointer processing operations are implemented. This allows the TUs to be synchronously multiplexed into TU groups (TUGs). The TUGs are then multiplexed to become the payload of a High Order VC (HOVC) that includes its own overhead bytes. The HOVC is aligned into an administrative units (AUs) by adding the AU pointer, then multiplexed into an AU group (AUG). Finally, the frame of an SDH Synchronous Transport Module level N (STM-N) is created by multiplexing N AUGs and adding the Multiplexer Section and Regenerator Section Overhead bytes (MSOH and RSOH).

SONET OC-3 Multiplexing Hierarchy

Figure 2 illustrates the SONET OC-3 multiplexing hierarchy supported on the Two-port STM-1/OC-3 Channelized E1/T1 line card. DS1 signals are multiplexed in one of two methods: Virtual Tributary Group structure VT1.5 mapping, which is used for DS1 transport, or T1 PDH M13 mapping, which multiplexes DS1 signals asynchronously to form a DS3 signal.

Figure 2 SONET OC-3 Multiplexing Hierarchy

In VT1.5 mapping, each DS1signal is individually mapped into a Virtual Tributary 1.5 (VT1.5) Synchronous Payload Envelope (SPE). Overhead bytes are added to the payload, the VTs are aligned using a VT pointer, and then synchronously multiplexed into a VT group (VTG). VTGs are further multiplexed to form the payload of an STS-1 SPE. The addition of overhead bytes, and alignment by using a pointer, completes the STS-1 signal. Three STS-1 signals are then synchronously multiplexed and complemented by Line and Section overhead bytes to form an STS-3 frame, which is then converted from electrical to optical to form an OC-3 signal.

In T1 PDH M13 mapping, DS1 signals can be multiplexed asynchronously to form a DS3 signal, which is then mapped directly into an STS-1 SPE. Three STS-1s are then combined to form the OC-3 signal.

Benefits

The Two-port STM-1/OC-3 Channelized E1/T1 line card concentrates up to 168 DS-1s in one line card. This level of aggregation increases per-rack density and overall router capacity, enabling service providers to scale networks in a cost-effective manner.

Restrictions

The following qualifications apply when you are configuring a Two-port STM-1/OC-3 Channelized E1/T1 line card:

Because a single clock line times all tributary channels on the Two-port STM-1/OC-3 Channelized E1/T1 line card, both ports of a card must be configured for the same channelization—either E1 channelization or T1 channelization. You cannot configure one port for E1 channelization and the other port for T1 channelization.

The maximum number of channel groups per STS-1, AU-3, or TUG-3 is 35; full channelization to DS0 is not supported.

The idle timeslot pattern, set using the idle pattern pattern command, affects a pair of STS-1s, AU-3s, or TUG-3s. The following pairs use the same idle timeslot pattern:

Port 0, path 1 — port 0, path 2

Port 0, path 3 — port 1, path 1

Port 1, path 2 — port 1, path 3

MLPPP bundles must be contained within a single line card. Links in a bundle can be assigned to different ports on the same card, but assigning links from different line cards to one bundle is not supported.

Related Features and Technologies

Weighted Random Early Detection (WRED)

Modified Deficient Round Robin (MDRR)

Multilink Point-to-Point Protocol (MLPPP)

Multiprotocol Label Switching (MPLS)

Virtual Private Networks (VPNs) for MPLS

Multilink Frame Relay (MLFR)

Multichannel STM-1 Port Adapter (PA-MC-STM1)

See the "Related Documents" in the next section for a list of documents that describe these features and technologies.

Related Documents

The following documents provide additional information about installing and configuring Two-port STM-1/OC-3 Channelized E1/T1 line cards:

2-port STM-1/OC-3 Channelized E1/T1 Line Card Installation and Configuration

Release Notes for Cisco IOS Release 12.0 ST

Release Notes for Cisco 7000 Family and Cisco 12000 Series Routers for Cisco IOS Release 12.0 S

Weighted Random Early Detection on the Cisco 12000 Series Router

Configuring Media-Independent PPP and Multilink PPP

Multiprotocol Label Switching on Cisco Routers

MPLS Virtual Private Networks

Multilink Frame Relay (FRF.16)

You can also find additional information in the installation and configuration guide for your Cisco 12000 series Internet Router, and in the Cisco IOS Release 12.0 documentation set.

Supported Platforms

Cisco 12008 Internet Router

Cisco 12012 Internet Router

Cisco 12016 Internet Router

Cisco 12410 Internet Router

Cisco 12416 Internet Router

The Two-port STM-1/OC-3 Channelized E1/T1 line card is compatible with any Cisco 12000 series Internet Router that is operating with the following system software: Cisco IOS Release 12.0(17)S or later, or Cisco IOS Release 12.0(17)ST or later.

Supported Standards, MIBs, and RFCs

Standards

Packet-over-SONET/SDH (POS), ITU-T G.957, ITU-T G.958 as applicable

Cisco HDLC

Layer 3 routing protocols, including BGPv4, OSPF, IS-IS, EIGRP, RIP, Distributed FIB IP switching, CDP, ICMP, RRR, and others

Multicast forwarding with support for source and shared distribution trees, and the following protocols: PIM-DIM, PIM-SM, AutoRP, IGMPv1/v2, CGMP, MBGP, MSDP, and others

Comprehensive MPLS support, including MPLS-VPN

Multilink Frame Relay (MLFR)

Traffic engineering using Routing with Resource Reservation (RRR)

At the E1 level: ITU-T G.703 support, framing support for CRC-4 and no-CRC-4 in conformance with ITU-T G.703 and ITU-T G.704

At the DS1level: Superframe (SF) and Extended Superframe (ESF) support, ANST T1.403 FDL support

MIBs

In addition to industry-standard SNMP and other MIBs supported on the Cisco 12000 series Internet Router, the Two-port STM-1/OC-3 Channelized E1/T1 line card also supports the following:

SONET/SDH MIB (RFC 2558, formerly RFC 1595)

DS3 MIB (RFC 2496)

DS1/E1 MIB (RFC 2495)

To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB web site on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

RFCs

IETF RFC 1490, Frame Relay Encapsulation

RFC 1619, Point-to-Point Protocol over SONET/SDH

RFC 1662, Point-to-Point Protocol in HDLC-like Framing

RFC 2615, PPP over SONET/SDH

Configuration Tasks

See the following sections for configuration tasks for the Two-port STM-1/OC-3 Channelized E1/T1 line card. Each task in the list is identified as either optional or required.

Configuring the SONET Controller

Configuring STS-1 Path Attributes under SONET Framing

Configuring Administrative Unit Group (AUG) Mapping under SDH Framing

Configuring the SONET Controller

To configure the SONET controller on the Two-port STM-1/OC-3 Channelized E1/T1 line card, perform the following steps:

 
Command
Purpose

Step 1 

Router(config)# controller sonet slot/port

Select the physical port you want to configure.

Step 2 

Router(config-controller)# framing {sonet | sdh}

Specify the framing type.

Step 3 

Router(config-controller)# clock source {internal | line}

Set the clock source for the selected OC-3/STM-1 port.

Step 4 

Router(config-controller)# description string

(Optional) Add a description for the controller.

Step 5 

Router(config-controller)# report {all | event}

(Optional) Enable reporting of selected alarm and signal events.

Step 6 

Router(config-controller)# threshold type value

(Optional) Set threshold values for the BER Threshold Crossing Alarms.

Configuring STS-1 Path Attributes under SONET Framing

To enter STS-1 path configuration mode to configure an STS-1 path under SONET framing on the Two-port STM-1/OC-3 Channelized E1/T1 line card, perform the following steps:

 
Command
Purpose

Step 1 

Router(config)# controller sonet slot/port

Select the physical port you want to configure.

Step 2 

Router(config-controller)# framing sonet

Specify SONET as the framing type.

Step 3 

Router(config-controller)# sts-1 number

Enter STS-1 path configuration mode.

Configuring the Mode of Operation

DS1 signals are multiplexed in one of two methods: Virtual Tributary Group (VTG) structure VT1.5 mapping, which is used for DS1 transport, or T1 PDH M13 mapping (channelized T3, or CT3), which multiplexes DS1 signals asynchronously to form a DS3 signal.

To configure the STS-1 mode of operation under SONET framing on the Two-port STM-1/OC-3 Channelized E1/T1 line card, perform the following steps:

 
Command
Purpose

Step 1 

Router(config)# controller sonet slot/port

Select the physical port you want to configure.

Step 2 

Router(config-controller)# framing sonet

Specify SONET as the framing type.

Step 3 

Router(config-controller)# sts-1 number

Enter STS-1 path configuration mode.

Step 4 

Router(config-crtlr-sts1)# mode {vt-15 | ct3}

Specify the mode of operation for the STS-1.

Configuring T3 Links Under SONET Framing

When you are configuring the Two-port STM-1/OC-3 Channelized E1/T1 line card for SONET framing, and have selected ct3 as the STS-1 mode of operation, you can configure the T3 link using the following steps:

 
Command
Purpose

Step 1 

Router(config-crtlr-sts1)# t3 framing [auto-detect | c-bit | m23]

Specify the framing type for the T3 link.

Step 2 

Router(config-crtlr-sts1)# t3 clock source [internal | line]

Set the clock source for the selected T3 link.

Configuring T1 Links Under SONET Framing

When you are configuring the Two-port STM-1/OC-3 Channelized E1/T1 line card for SONET framing, and have selected vt-15 as the STS-1 mode of operation, you can configure the T1 link using the following steps:

 
Command
Purpose

Step 1 

Router(config-crtlr-sts1)# vtg vtg-number t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

Create a logical channel group on a T1 line.

Step 2 

Router(config-crtlr-sts1)# vtg vtg-number t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

Specify the T1 framing format.

Step 3 

Router(config-crtlr-sts1)# vtg vtg-number t1 t1-line-number clock source {internal | line}

Set the internal or line (network) clock source.

When you are configuring the Two-port STM-1/OC-3 Channelized E1/T1 line card for SONET framing, and have selected ct3 as the STS-1 mode of operation, you can configure the T1 link using the following steps:

 
Command
Purpose

Step 1 

Router(config-crtlr-sts1)# t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

Create a logical channel group on a T1 line.

Step 2 

Router(config-crtlr-sts1)# t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

Specify the T1 framing format.

Step 3 

Router(config-crtlr-sts1)# t1 t1-line-number clock source {internal | line}

Set the internal or line (network) clock source.

Configuring an Interface under SONET Framing

After a T1 channel group is configured, it appears to the Cisco IOS software as a serial interface; therefore, all the configuration commands for a serial interface are available, but not all commands are applicable to the T1 channel group.

All the encapsulation formats, such as PPP, HDLC, and Frame Relay are applicable to the configured T1 channel group. Be sure that you are in serial interface configuration mode when you set the encapsulation format.

All the switching types that are applicable to a serial interface are also applicable to the configured T1 channel group.

To configure a serial interface, use one of the following commands:

Command
Purpose

Router(config)# interface serial slot/port.sts1-number/
vtg-number/t1-number:channel-group-number

In VT1.5 mode, select the line card interface to be configured.

Router(config)# interface serial slot/port.sts1-number/
t1-number:channel-group-number

In CT3 mode, select the line card interface to be configured.


Configuring Administrative Unit Group (AUG) Mapping under SDH Framing

In SDH, there are two possible mapping/multiplexing schemes for most payload types: ANSI and ETSI.

In ANSI mapping, the Low Order payloads are aggregated into a VC-3 High Order Path. An AU pointer is added to the VC-3 to create an AU-3 (Administrative Unit type 3). Three such AU-3s are then synchronously multiplexed into an AUG (AU group). The multiplexing scheme is as follows:

... VC-3 <-> AU-3 (x3) <-> AUG <-> STM-1

SDH ANSI mapping is very similar to the SONET frame structure.

In ETSI mapping, the Low Order payloads are aggregated into a VC-4 High Order Path. An AU pointer is added to the VC-4 to create an AU-4 (Administrative Unit type 4). One AU-4 is "multiplexed" into an AUG (AU group), which is to say, the AUG is, in fact, equivalent to an AU-4. The multiplexing scheme is as follows:

... TUG-3 (x3) <-> VC-4 <-> AU-4 (x1) <-> STM-1

To specify the AUG mapping under SDH framing on the Two-port STM-1/OC-3 Channelized E1/T1 line card, perform the following steps:

 
Command
Purpose

Step 1 

Router(config)# controller sonet slot/port

Select the physical port you want to configure.

Step 2 

Router(config-controller)# framing sdh

Specify SDH as the framing type.

Step 3 

Router(config-controller)# aug mapping {au-3 | au-4}

Select AU-3 or AU-4 AUG mapping.


Note When configured for SDH framing, the Two-port STM-1/OC-3 Channelized E1/T1 line card supports channelization to E1s when the AUG mapping is set to AU-4, and channelization to T1s when the AUG mapping is set to AU-3. Different combinations of payload types and AUG mappings are not supported.


Configuring an AU-3

Under SDH framing with AUG mapping set to AU-3, each VC-3 High Order Path can be configured to carry up to 28 T1s, mapped into VC-11s. The mode of operation of an AU-3 is not configurable, and defaults to mode c-11.

Entering AU-3 Configuration Mode

When you are configuring the Two-port STM-1/OC-3 Channelized E1/T1 line card for SDH framing, and have selected au-3 as the mode of operation, you can configure an AU-3 using the following steps:

 
Command
Purpose

Step 1 

Router(config)# controller sonet slot/port

Select the physical port you want to configure.

Step 2 

Router(config-controller)# framing sdh

Specify SDH as the framing type.

Step 3 

Router(config-controller)# aug mapping au-3

Select AU-3 AUG mapping.

Step 4 

Router(config-controller)# au-3 number

Select the AU-3 to be configured and enter AU-3 configuration mode.

Configuring a T1 Line in AU-3 Configuration Mode

When you are configuring the Two-port STM-1/OC-3 Channelized E1/T1 line card for SDH framing, and have selected au-3 as the mode of operation, you can configure a T1 line using the following steps:

 
Command
Purpose

Step 1 

Router(config-crtlr-au3)# tug-2 tug-2-number t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

Create a logical channel group on a T1 line.

Step 2 

Router(config-crtlr-au3)# tug-2 tug-2-number t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

Specify the T1 framing format.

Step 3 

Router(config-crtlr-au3)# tug-2 tug-2-number t1 t1-line-number clock source {internal | line}

Set the internal or line (network) clock source.

Configuring an Interface under SDH with AU-3 AUG Mapping

Command
Purpose

Router(config)# interface serial slot/port.au-3-number/
tug-2-number/t1-number:channel-group-number

Select the line card interface.


Configuring a TUG-3 under AU-4 AUG Mapping

Under SDH framing with AUG mapping set to AU-4, the VC-4 High Order Path comprises three TUG-3s. Each TUG-3 can be configured to carry up to 21 E1s, mapped into VC-12s. The mode of operation of a TUG-3 is not configurable, and defaults to mode c-12.

Entering TUG-3 Configuration Mode

When you are configuring the Two-port STM-1/OC-3 Channelized E1/T1 line card for SDH framing, and have selected au-4 as the mode of operation, you can configure a TUG-3 using the following steps:

 
Command
Purpose

Step 1 

Router(config)# controller sonet slot/port

Select the physical port you want to configure.

Step 2 

Router(config-controller)# framing sdh

Specify SDH as the framing type.

Step 3 

Router(config-controller)# aug mapping au-4

Select AU-4 AUG mapping.

Step 4 

Router(config-controller)# au-4 1 tug-3 number

Select the TUG-3 to be configured and enter TUG-3 configuration mode.

Configuring an E1 Line in TUG-3 Configuration Mode

When you are configuring the Two-port STM-1/OC-3 Channelized E1/T1 line card for SDH framing, and have selected AU-4 AUG mapping, you can configure an E1 line using the following steps:

 
Command
Purpose

Step 1 

Router(config-crtlr-tug3)# tug-2 tug-2-number e1 e1-line-number channel-group channel-group-number timeslots list-of-timeslots

Create a logical channel group on an E1 line.

Step 2 

Router(config-crtlr-tug3)# tug-2 tug-2-number e1 e1-line-number unframed

(Optional) Configure the E1 line as an unframed E1 line.

Step 3 

Router(config-crtlr-tug3)# tug-2 tug-2-number e1 e1-line-number framing {crc4 | no-crc4}

Specify the E1 framing format.

Step 4 

Router(config-crtlr-tug3)# tug-2 tug-2-number e1 e1-line-number clock source {internal | line}

Set the internal or line (network) clock source.

Step 5 

Router(config-crtlr-tug3)# tug-2 tug-2-number e1 e1-line-number national bits pattern

Configure the national reserve bit pattern.

Configuring an Interface under SDH with AU-4 AUG Mapping

Command
Purpose

Router(config)# interface serial slot/port.au-4-number/
tug-3-number/tug-2-number/e1-number:channel-group-number

Select the line card interface.


Verifying Operation

To verify the operation of the controllers and interfaces configured on the Two-port STM-1/OC-3 Channelized E1/T1 line card, perform the following steps:

 
Command
Purpose

Step 1 

Router# show version

Displays the configuration of the system hardware, the software release, the names and sources of configuration files, and the boot images. Verify that the list includes the newly configured Two-port STM-1/OC-3 Channelized E1/T1 line card ports and interfaces.

Step 2 

Router# show controllers sonet slot/port [brief | tabular]

Displays an exhaustive list of information about a SONET port, including information about all the configured channels.

When framing is SDH and AUG mapping is AU-4, the slot/port argument takes the form:

 slot/port.au-4-number/tug-3-number/tug-2-number/e1-line-number

When framing is SDH and AUG mapping is AU-3, the slot/port argument takes the form:

 slot/port.au-3-number/tug-2-number/t1-line-number

When framing is SONET and the mode is CT3, the slot/port argument takes the form:

 slot/port.sts1-number/t1-line-number

When framing is SONET and the mode is VT1.5, the slot/port argument takes the form:

 slot/port.sts1-number/vtg-number/t1-line-number

Step 3 

Router# show interfaces

Displays status and configuration of interfaces.

Step 4 

Router# show protocols

Displays information about the protocols configured for the system as a whole, and for specific interfaces.

Monitoring and Maintaining Operation

See the following sections for monitoring and maintenance tasks for the Two-port STM-1/OC-3 Channelized E1/T1 line card.

Using clear Commands on Serial Interfaces

Using Loopbacks

Using BER Tests

Using clear Commands on Serial Interfaces

Command
Purpose

Router# clear interface serial slot/port.path:channel-group-number

Reset the hardware logic for a serial interface, where path depends on the interface configuration:

When framing is SDH and AUG mapping is AU-4, path takes the form:

  au-4-number/tug-3-number/tug-2-number/e1-line-number

When framing is SDH and AUG mapping is AU-3, path takes the form:

  au-3-number/tug-2-number/t1-line-number

When framing is SONET and the mode is CT3, path takes the form:

  sts1-number/t1-line-number

When framing is SONET and the mode is VT1.5, path takes the form:

  sts1-number/vtg-number/t1-line-number

Router# clear counters serial slot/port.path:channel-group-number

Initialize the counters for a serial interface.


Using Loopbacks

The Two-port STM-1/OC-3 Channelized E1/T1 line card supports loopback tests at the OC-3/STM-1 port level, as well as at the T3, T1, and E1 link level. To set a loopback at one of those levels, use one of the following commands:

Command
Purpose

Router (config-controller)# loopback [local | network]

Set a loopback to test the OC-3/STM-1 port.

Router (config-ctrlr-sts1)# t3 loopback [local | network | remote]

Set a loopback to test a T3 link.

Router (config-ctrlr-sts1)# vtg number t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

In vt-15 mode, set a loopback to test a T1 link.

Router (config-ctrlr-sts1)# t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

In ct3 mode, set a loopback to test a T1 link.

Router (config-ctrlr-au3)# tug-2 tug-2-number t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

When framing is SDH with AU-3 AUG mapping, set a loopback to test a T1 link.

Router (config-ctrlr-tug3)# tug-2 tug-2-number e1 e1-line-number loopback {local | network {line | payload}}

When framing is SDH with AU-4 AUG mapping, set a loopback to test a E1 link.


Using BER Tests

The Two-port STM-1/OC-3 Channelized E1/T1 line card supports BER tests at the T1 and E1 link level. To enable a BERT at one of those levels, use one of the following commands:

Command
Purpose

Router (config-ctrlr-sts1)# vtg vtg-number t1 t1-line-number bert pattern pattern interval time

In vt-15 mode, enable a BERT on a T1 link.

Router (config-ctrlr-sts1)# t1 t1-line-number bert pattern pattern interval time

In ct3 mode, enable a BERT on a T1 link.

Router (config-ctrlr-au3)# tug-2 tug-2-number t1 t1-line-number bert pattern pattern interval time

When framing is SDH with AU-3 AUG mapping, enable a BERT on a T1 link.

Router (config-ctrlr-tug3)# tug-2 tug-2-number e1 e1-line-number bert pattern pattern interval time

When framing is SDH with AU-4 AUG mapping, enable a BERT on an E1 link.


Configuration Examples

This section provides the following configuration examples:

Configuring for SONET Framing and CT3 Mode of Operation

Configuring for SONET Framing and VT1.5 Mode of Operation

Configuring for SDH Framing with AU-4 AUG Mapping

Configuring for SONET Framing and CT3 Mode of Operation

In the following example, port 0 of a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 2 of a Cisco 12000 series Internet Router is configured for SONET framing with CT3 mode of operation. This example is an excerpt from a larger example that configures 168 T1s for CT3 and VT1.5 operation, and shows only the configuration for the first STS-1 (one of three).

controller SONET 2/0
 clock source line
 framing sonet
 !
 sts-1 1
  mode ct3
  t3 framing m23
  t3 clock source line
  t1 1 clock source Line
  t1 1 channel-group 0 timeslots 1-24
  t1 2 clock source Line
  t1 2 channel-group 0 timeslots 1-24
  t1 3 clock source Line
  t1 3 channel-group 0 timeslots 1-24
  .
  .
  .
  t1 28 clock source Line
  t1 28 channel-group 0 timeslots 1-24
!
!
interface Serial2/0.1/1:0                ! STS-1 1, T1 1
 ip address 20.141.20.1 255.255.255.252
 no ip directed-broadcast
 .
 .
 .
!
interface Serial2/0.1/28:0                ! STS-1 1, T1 28
 ip address 20.141.20.109 255.255.255.252
 no ip directed-broadcast

(Additional display text is not shown.)

Configuring for SONET Framing and VT1.5 Mode of Operation

In the following example, port 1 of a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 2 is configured for SONET framing with VT1.5 mode of operation. This example is an excerpt from a larger example that configures 168 T1s for CT3 and VT1.5 operation, and shows only the configuration for the first STS-1 (one of three).

controller SONET 2/1
 clock source line
 framing sonet
 !
 sts-1 1
  mode vt-15
  vtg 1 t1 1 clock source Line
  vtg 1 t1 1 channel-group 0 timeslots 1-24
  vtg 1 t1 2 clock source Line
  vtg 1 t1 2 channel-group 0 timeslots 1-24
  vtg 1 t1 3 clock source Line
  vtg 1 t1 3 channel-group 0 timeslots 1-24
  vtg 1 t1 4 clock source Line
  vtg 1 t1 4 channel-group 0 timeslots 1-24
  .
  .
  .
  vtg 7 t1 1 clock source Line
  vtg 7 t1 1 channel-group 0 timeslots 1-24
  vtg 7 t1 2 clock source Line
  vtg 7 t1 2 channel-group 0 timeslots 1-24
  vtg 7 t1 3 clock source Line
  vtg 7 t1 3 channel-group 0 timeslots 1-24
  vtg 7 t1 4 clock source Line
  vtg 7 t1 4 channel-group 0 timeslots 1-24
!
!
interface Serial2/1.1/1/1:0                ! STS-1 1, VTG 1, T1 1
 ip address 20.141.23.1 255.255.255.252
 no ip directed-broadcast
 .
 .
 .
!
interface Serial2/1.1/1/4:0                ! STS-1 1, VTG 1, T1 4
 ip address 20.141.23.13 255.255.255.252
 no ip directed-broadcast
 .
 .
 .
!
interface Serial2/1.1/7/1:0                ! STS-1 1, VTG 7, T1 1
 ip address 20.141.23.97 255.255.255.252
 no ip directed-broadcast
 .
 .
 .
!
interface Serial2/1.1/7/4:0                ! STS-1 1, VTG 7, T1 4
 ip address 20.141.23.109 255.255.255.252
 no ip directed-broadcast

(Additional display text is not shown.)

Configuring for SDH Framing with AU-4 AUG Mapping

In the following example, port 0 of a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 2 is configured for SDH framing with AU-4 AUG mapping. This example is excerpted from a larger example that configures 126 E1s, and shows only the configuration of the first TUG-3.

controller SONET 2/0
 clock source line
 framing sdh
 aug mapping au-4
 !
 au-4 1 tug-3 1
  mode c-12
  tug-2 1 e1 1 clock source Line
  tug-2 1 e1 1 channel-group 0 timeslots 1-31
  tug-2 1 e1 2 clock source Line
  tug-2 1 e1 2 channel-group 0 timeslots 1-31
  tug-2 1 e1 3 clock source Line
  tug-2 1 e1 3 channel-group 0 timeslots 1-31
  .
  .
  .
  tug-2 7 e1 1 clock source Line
  tug-2 7 e1 1 channel-group 0 timeslots 1-31
  tug-2 7 e1 2 clock source Line
  tug-2 7 e1 2 channel-group 0 timeslots 1-31
  tug-2 7 e1 3 clock source Line
  tug-2 7 e1 3 channel-group 0 timeslots 1-31
!
interface Serial2/0.1/1/1/1:0                ! AU-4 1, TUG-3 1, TUG-2 1, E1 1
 ip address 20.141.20.1 255.255.255.252
 no ip directed-broadcast
 ip load-sharing per-packet
.
.
.
interface Serial2/0.1/1/7/1:0                ! AU-4 1, TUG-3 1, TUG-2 7, E1 1
 ip address 20.141.20.73 255.255.255.252
 no ip directed-broadcast
!
interface Serial2/0.1/1/1/2:0                ! AU-4 1, TUG-3 1, TUG-2 1, E1 2
 ip address 20.141.20.5 255.255.255.252
 no ip directed-broadcast
 ip load-sharing per-packet
.
.
.
interface Serial2/0.1/1/7/2:0                ! AU-4 1, TUG-3 1, TUG-2 7, E1 2
 ip address 20.141.20.77 255.255.255.252
 no ip directed-broadcast
!
interface Serial2/0.1/1/1/3:0                ! AU-4 1, TUG-3 1, TUG-2 1, E1 3
 ip address 20.141.20.9 255.255.255.252
 no ip directed-broadcast
.
.
.
interface Serial2/0.1/1/7/3:0                ! AU-4 1, TUG-3 1, TUG-2 7, E1 3
 ip address 20.141.20.81 255.255.255.252
 no ip directed-broadcast

(Additional display text is not shown.)

Command Reference

This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command reference publications.

au-3

au-4 tug-3

aug mapping

clear counters serial

clear interface serial

clock source (controller)

controller sonet

framing (controller)

loopback (controller)

mode

overhead c2

overhead j0

overhead j1

overhead s1s0

report

show controllers sonet

show interfaces serial

sts-1

t1 bert pattern

t1 channel-group timeslots

t1 clock source

t1 fdl ansi

t1 framing

t1 loopback

t3 clock source

t3 equipment loopback

t3 framing

t3 loopback

threshold

tug-2 e1 bert pattern

tug-2 e1 channel-group timeslots

tug-2 e1 clock source

tug-2 e1 framing

tug-2 e1 loopback

tug-2 e1 national bits

tug-2 e1 unframed

au-3

To enter the AU-3 path configuration mode to configure an AU-3, use the au-3 controller configuration command. To remove the AU-3 configuration, use the no form of this command.

au-3 au-3-number

no au-3 au-3-number

Syntax Description

au-3-number

A number in the range from 1 to 3.


Defaults

No default behavior or values.

Command Modes

Controller configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

An AUG of an STM-1 can be derived from either AU-3s or an AU-4. In ANSI mapping, the Low Order payloads are aggregated into a VC-3 High Order Path. An AU pointer is added to the VC-3 to create an AU-3 (Administrative Unit type 3). Three such AU-3s are then synchronously multiplexed into an AUG (AU group). The multiplexing scheme is as follows:

... VC-3 <-> AU-3 (x3) <-> AUG <-> STM-1

To map the AUG to an AU-3, use the aug mapping au-3 controller configuration command.

Configuring the au-3 command enters AU-3 configuration mode, and creates a serial interface with the following name format:

slot/port.au-3-number/tug-2-number/t1-number:channel-group-number

The aug mapping and au-3 commands are available only when SDH framing is configured.

Examples

In the example that follows, the second AU-3 in port 0 of the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 4 of a Cisco 12000 series Internet Router is selected for configuration:

Router(config)# controller sonet 4/0
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-3
Router(config-controller)# au-3 2
Router(config-ctrlr-au3)# 

Related Commands

Command
Description

aug mapping

Specify the AUG mapping when SDH framing is selected.


au-4 tug-3

To configure a TUG-3, use the au-4 tug-3 controller configuration command to enter TUG-3 configuration mode, which is indicated by a change in the command prompt. To remove a TUG-3 configuration, use the no form of this command.

au-4 au-4-number tug-3 tug-3-number

no au-4 au-4-number tug-3 tug-3-number

Syntax Description

au-4-number

A number in the range from 1 to N, where N is the STM level. (For the Two-port STM-1/OC-3 Channelized E1/T1 line card, N is always 1.)

tug-3-number

A number in the range from 1 to 3.


Defaults

No default behavior or values.

Command Modes

Controller configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

An AUG of an STM-1 can be derived from either AU-3s or an AU-4. In ETSI mapping, the Low Order payloads are aggregated into a VC-4 High Order Path. An AU pointer is added to the VC-4 to create an AU-4 (Administrative Unit type 4). One AU-4 is "multiplexed" into an AUG (AU group), which is to say, the AUG is, in fact, equivalent to an AU-4. The multiplexing scheme is as follows:

... TUG-3 (x3) <-> VC-4 <-> AU-4 (x1) <-> STM-1

To map the AUG to an AU-4, use the aug mapping au-4 controller configuration command.

Configuring the au-4 tug-3 command enters TUG-3 configuration mode, and creates a serial interface with the following name format:

slot/port.au-4-number/tug-3-number/tug-2-number/e1-number:channel-group-number

The aug mapping and au-4 tug-3 commands are available only when SDH framing is configured.

Examples

In the following example, the second TUG-3 of the AU-4 in port 0 of the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 4 of a Cisco 12000 series Internet Router is selected for configuration:

Router(config)# controller sonet 4/0
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-4
Router(config-controller)# au-4 1 tug-3 2
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

aug mapping

Specify the AUG mapping when SDH framing is selected.


aug mapping

To specify the AUG mapping when SDH framing is selected, use the aug mapping controller configuration command. To restore the default AUG mapping, use the no form of this command.

aug mapping {au-3 | au-4}

no aug mapping {au-3 | au-4}

Syntax Description

au-3

Select AU-3 AUG mapping.

au-4

Select AU-4 AUG mapping. This is the default.


Defaults

AU-4 mapping

Command Modes

Controller configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

In SDH, there are two possible mapping/multiplexing schemes for most payload types: ANSI and ETSI.

In ANSI mapping, the Low Order payloads are aggregated into a VC-3 High Order Path. An AU pointer is added to the VC-3 to create an AU-3 (Administrative Unit type 3). Three such AU-3s are then synchronously multiplexed into an AUG (AU group). The multiplexing scheme is as follows:

... VC-3 <-> AU-3 (x3) <-> AUG <-> STM-1

SDH ANSI mapping is very similar to the SONET frame structure.

In ETSI mapping, the Low Order payloads are aggregated into a VC-4 High Order Path. An AU pointer is added to the VC-4 to create an AU-4 (Administrative Unit type 4). One AU-4 is "multiplexed" into an AUG (AU group), which is to say, the AUG is, in fact, equivalent to an AU-4. The multiplexing scheme is as follows:

... TUG-3 (x3) <-> VC-4 <-> AU-4 (x1) <-> STM-1

This command is available only when SDH framing is configured.

Examples

The example that follows selects AU-3 mapping for port 1 of the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 2 of a Cisco 12000 series Internet Router:

Router(config)# controller sonet 2/1
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-3

Related Commands

Command
Description

framing (controller)

Determine whether the port is to be used in SONET mode or SDH mode.


clear counters serial

To clear the counters for a serial interface configured on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the clear counters serial EXEC command.

clear counters serial slot/port.path:channel-group

Syntax Description

slot

The chassis slot where the Two-port STM-1/OC-3 Channelized E1/T1 line card is installed.

port

The physical port on the Two-port STM-1/OC-3 Channelized E1/T1 line card. Either 0 or 1.

.path

Depends on the interface configuration:

When framing is SDH and AUG mapping is AU-4, path takes the form:

au-4-number/tug-3-number/tug-2-number/e1-line-number

When framing is SDH and AUG mapping is AU-3, path takes the form:

au-3-number/tug-2-number/t1-line-number

When framing is SONET and the mode is CT3, path takes the form:

sts1-number/t1-line-number

When framing is SONET and the mode is VT1.5, path takes the form:

sts1-number/vtg-number/t1-line-number

:channel-group

Channel group identifier: 0 to 30 for an E1 line; 0 to 23 for a T1 line.


Defaults

No default behavior or values.

Command Modes

EXEC

Command History

Release
Modification

10.0

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

The clear counters serial command resets the counters for a serial interface. To reset the interface hardware, use the clear interface serial command. To check the status of the interface, use the show interfaces serial command.


Note As long as the serial interface is available, you can enter this command immediately after using the enable command to enter privileged EXEC mode.


Examples

The following example clears the counters for serial interface 3/1.1/1/1:1, which is configured in the context of SONET framing in vt-15 mode. The number sequence .1/1/1:1 corresponds to the sts-1-number/vtg-number/t1-line-number:channel-group number sequence.

Router# clear counters serial 3/1.1/1/1:1
Clear "show interface" counters on this interface [confirm] 
Router# 

Related Commands

Command
Description

clear interface serial

Resets the interface hardware.

show interfaces

Displays statistics for all interfaces configured on the router or access server.

show interfaces serial

Displays information about a serial interface.


clear interface serial

To reset the hardware logic for a serial interface configured on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the clear interface serial EXEC command.

clear interface serial slot/port.path:channel-group

Syntax Description

slot

The chassis slot where the Two-port STM-1/OC-3 Channelized E1/T1 line card is installed.

port

The physical port on the Two-port STM-1/OC-3 Channelized E1/T1 line card. Either 0 or 1.

.path

Depends on the interface configuration:

When framing is SDH and AUG mapping is AU-4, path takes the form:

au-4-number/tug-3-number/tug-2-number/e1-line-number

When framing is SDH and AUG mapping is AU-3, path takes the form:

au-3-number/tug-2-number/t1-line-number

When framing is SONET and the mode is CT3, path takes the form:

sts1-number/t1-line-number

When framing is SONET and the mode is VT1.5, path takes the form:

sts1-number/vtg-number/t1-line-number

:channel-group

Channel group identifier: 0 to 30 for an E1 line; 0 to 23 for a T1 line.


Defaults

No default behavior or values.

Command Modes

EXEC

Command History

Release
Modification

10.0

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

The clear interface serial command resets the interface hardware. To reset the counters for an interface, use the clear counters serial command. To check the status of the interface, use the show interfaces serial command.


Note As long as the serial interface is available, you can enter this command immediately after using the enable command to enter privileged EXEC mode.


Examples

The following example clears serial interface 3/1.1/1/1:1, which is configured in the context of SONET framing in vt-15 mode. The number sequence .1/1/1/1:1 corresponds to the sts-1-number/vtg-number/t1-line-number:channel-group number sequence.

Router# clear interface serial 3/1.1/1/1:1
Router# 

Related Commands

Command
Description

clear counters serial

Clears the interface counters.

show interfaces

Displays statistics for all interfaces configured on the router or access server.

show interfaces serial

Displays information about a serial interface.


clock source (controller)

To specify the clock source for the selected OC-3/STM-1 port on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the clock source controller configuration command. To reset the clock source to the default, use the no form of this command.

clock source {internal | line}

no clock source {internal | line}

Syntax Description

internal

Internal clock source.

line

Network clock source. This is the default.


Defaults

Line

Command Modes

Controller configuration

Command History

Release
Modification

10.3

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Typically, an OC-3/STM-1 port on the Two-port STM-1/OC-3 Channelized E1/T1 line card is connected to a SONET or SDH add/drop multiplexer (ADM). In this application, Cisco recommends using the default setting of clock source line, because:

The clock source used by the SONET/SDH network is of higher accuracy than the internal clock source on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

The SONET/SDH network is designed for optimal operation in synchronous mode, where all clocks used in the network can be traced to a single high-accuracy clock source. Using the internal clock on the Two-port STM-1/OC-3 Channelized E1/T1 line card port introduces an independent clock source into the network, and may cause synchronization-related anomalies to be detected by the SONET/SDH network elements.

When configured for line clocking, the Two-port STM-1/OC-3 Channelized E1/T1 line card port will automatically default to internal clocking if the line clock source is considered unusable for any of the following reasons:

The port detects a Loss of Signal (SLOS) defect.

The port detects a Loss of Frame (LOF) defect.

The port detects a Section (RS) Loss of Frame (SLOF) defect.

The port detects a Line (MS) Alarm Indication Signal (LAIS) defect.

The port receives the "Do not use for synchronization" code in byte S1 of the Line (MS) overhead.

The port has been put into the local loopback mode through the use of the loopback local controller command. When the loopback is cleared, the port reverts to using the line clock source.


Note The OC-3/STM-1 port on the Two-port STM-1/OC-3 Channelized E1/T1 line card always sends the "Do not use for synchronization" code in byte S1 of the Line (MS) overhead toward the directly connected ADM.


Examples

The following example selects the internal clock source:

Router(config)# controller sonet 6/0
Router(config-controller)# clock source internal
Router(config-controller)# 

Related Commands

Command
Description

t1 clock source

Set the internal or line (network) clock source for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

t3 clock source

Set the clock source for the selected T3 link.

tug-2 e1 clock source

Specify where the clock source is obtained for an E1 line.


controller sonet

To select the physical port to configure on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the controller sonet global configuration command. To delete the defined controller, use the no form of this command.

controller sonet slot/port

no controller sonet slot/port

Syntax Description

slot

The chassis slot where the Two-port STM-1/OC-3 Channelized E1/T1 line card is installed.

port

The physical port on the Two-port STM-1/OC-3 Channelized E1/T1 line card. Either 0 or 1.


Defaults

No default behavior or values.

Command Modes

Global configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

This command is used to select an STM-1/OC-3 physical port so that additional channelization parameters for its associated T3, T1, or E1 links can be configured.

Examples

The example that follows selects port 1 of the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 3 of a Cisco 12000 series Internet Router:

Router(config)# controller sonet 3/1
Router(config-controller)#

Related Commands

Command
Description

show controllers sonet

Displays information that is specific to SONET controllers in a Cisco 12000 series Internet Router.


framing (controller)

To determine whether the port is to be used in SONET mode or SDH mode, use the framing controller configuration command. To reset the framing mode to the default, use the no form of this command.

framing {sonet | sdh}

no framing

Syntax Description

sonet

SONET mode. This is the default.

sdh

SDH mode.


Defaults

SONET

Command Modes

Controller configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Normally, both OC-3/STM-1 ports should be configured to the same framing type: either both ports configured for SONET, or both ports configured for SDH. The specific restriction applies to mixing E1 and T1 channels on one line card, which is not supported. If you attempt to violate this restriction, the system will display a warning message.

Examples

The following example selects SDH framing for port 1 of the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 3 of a Cisco 12000 series Internet Router:

Router(config)# controller sonet 3/1
Router(config-controller)# framing sdh
Router(config-controller)# 

Related Commands

Command
Description

t1 framing

Specify the T1 framing format for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

t3 framing

Specify the framing type for the T3 link.

tug-2 e1 framing

Specify the E1 framing format for an E1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.


loopback (controller)

To set a SONET/SDH port loopback on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the loopback controller configuration command. To remove a loopback, use the no form of this command.

loopback [local | network]

no loopback [local | network]

Syntax Description

local

Local (diagnostic) loopback mode.

network

Network (line) loopback mode.


Defaults

No loopback is set.

Command Modes

Controller configuration

Command History

Release
Modification

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Use the loopback local controller configuration command to diagnose problems with the Two-port STM-1/OC-3 Channelized E1/T1 line card when it is isolated from the network cables.

Network loopback loops the entire STM-1/STS-3 frame back toward the network and can be used to diagnose problems with cables.

Examples

The following example shows how to configure the port for local loopback. The port is port 0 on a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 6 of the Cisco 12000 series Internet Router:

Router(config)# controller sonet 6/0
Router(config-controller)# loopback local
Router(config-controller)# 

The following example shows how to configure the port for network loopback. The port is port 0 on a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 6 of the Cisco 12000 series Internet Router:

Router(config)# controller sonet 6/0
Router(config-controller)# loopback network
Router(config-controller)# 


Related Commands

Command
Description

t1 loopback

Set a loopback on a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

t3 loopback

Set a loopback on a T3 link on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

tug-2 e1 loopback

Set a loopback on an E1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.


mode

To specify the mode of operation of an STS-1, use the mode STS-1 path configuration command. To restore the default, use the no form of this command.

mode {ct3 | vt-15}

no mode {ct3 | vt-15}

Syntax Description

ct3

Channelized T3. This is the default.

vt-15

Virtual Tributary Group structure VT1.5.


Defaults

ct3

Command Modes

STS-1 path configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

The ct3 and vt-15 keywords were added for use with the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

When you select ct3, the specified STS-1 will carry a DS3 signal divided into 28 T1s (multiplexed asynchronously).

When you select vt-15, the specified STS-1 is divided into seven virtual tributary groups (VTGs). Each of those VTGs is then divided into four VT1.5s, each carrying one T1.


Note Under SDH framing with AUG mapping set to AU-4, the VC-4 High Order Path comprises three TUG-3s. Each TUG-3 can be configured to carry up to 21 E1s, mapped into VC-12s. The mode of operation of a TUG-3 is not configurable, and defaults to mode c-12.

Under SDH framing with AUG mapping set to AU-3, each VC-3 High Order Path can be configured to carry up to 28 T1s, mapped into VC-11s. The mode of operation of an AU-3 is not configurable, and defaults to mode c-11.


Examples

The following example selects ct3 as the STS-1 mode of operation:

Router(config)# controller sonet 4/0
Router(config-controller)# framing sonet
Router(config-controller)# sts-1 3
Router(config-ctrlr-sts1)# mode ct3

Related Commands

Command
Description

sts-1

Enter STS-1 configuration mode to configure an STS-1.


overhead c2

To set the SONET/SDH Path Signal Label value, use the overhead c2 controller configuration command. To restore the default value, use the no form of this command.

overhead c2 number

no overhead c2 number

Syntax Description

c2

Sets the high order path signal label indicator.

number

Specifies byte value in the range from 0 to 255.


Defaults

For vt15, c11, and c12 modes, the default value of c2 is 02; for the ct3 mode, the default value of c2 is 04.

Command Modes

SDH framing with AU-4 mapping

Controller configuration

SDH with AU-3 mapping

AU-3 path configuration

SONET framing with VT1.5

Controller configuration

Command History

Release
Modification

12.0(17)S

This command was introduced to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

The Signal Label field occupies one byte (C2) of the SONET STS Path overhead and the SDH High Order Path overhead. It is used to indicate the type of contents carried in the SONET Synchronous Payload Envelope (SPE) or SDH High Order Virtual Container (HOVC).

Setting the Path Signal Label affects both the Transmitted (sent) value and the Expected value of the C2 overhead byte.

Examples

The following example sets the C2 value in SDH with AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 overhead c2 98
Router(config-controller)#

The following example sets the C2 value in SDH with AU-3:

Router(config)# controller sonet 6/0
Router(config-controller)# au-3 3
Router(config-ctrlr-au3)# overhead c2 98
Router(config-ctrlr-au3)#

The following example sets the C2 value in SONET:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 3
Router(config-ctrlr-sts1)# overhead c2 98
Router(config-ctrlr-sts1)#

Related Commands

Command
Description

overhead j0

Specifies the Section (RS) Trace identifier (J0).

overhead j1

Configures the message length and the message text of the STS/High Order Path Trace identifier (J1).

overhead s1s0

Sets the values of the S1 and S0 bits of H1 Administrative Unit (AU) pointer byte.


overhead j0

To specify the Section (RS) Trace identifier (J0), use the overhead j0 controller configuration command. To restore the default value, use the no form of this command.

overhead j0 number

no overhead j0 number

Syntax Description

j0

Sets the Section (RS) Trace identifier.

number

Specifies byte value in the range from 0 to 255. The default is 1.


Defaults

The default is 1.

Command Modes

Controller configuration

Command History

Release
Modification

12.0(17)S

This command was introduced to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Section trace is a maintenance feature of SONET. One byte (J0) of the Section overhead associated with each SONET frame is used to carry information identifying the transmitting equipment.

Examples

The following example sets the Section Trace identifier to 82

Router(config-controller)# overhead j0 82
Router(config-controller)#

Related Commands

Command
Description

overhead c2

Sets the SONET/SDH Path Signal Label value.

overhead j1

Configures the message length and the message text of the STS/High Order Path Trace identifier (J1).

overhead s1s0

Sets the values of the S1 and S0 bits of H1 Administrative Unit (AU) pointer byte.


overhead j1

To configure the message length and the message text of the STS/High Order Path Trace identifier (J1), use the overhead j1 configuration command. Where you configure the Path Trace identifier depends on the framing (SDH or SONET) and the AUG mapping. In SDH with AU-4 mapping, the Path Trace identifier is configured at the SONET controller level. In SDH with AU-3 mapping or in SONET framing, the Path Trace identifier is configured at the path level. To restore the default value, use the no form of this command.

overhead j1 {length {16 | 64}} | {message text}

no overhead j1 {length {16 | 64}} | {message text}

Syntax Description

length {16 | 64}

Length of the message in characters (bytes).

message text

Message text.


Defaults

The default message length is 16 for SDH framing, and 64 for SONET framing.

Command Modes

SDH framing with AU-4 mapping

Controller configuration

SDH framing with AU-3 mapping, or SONET framing

Path configuration

Command History

Release
Modification

12.0(17)S

This command was introduced to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Path trace is a maintenance feature of SONET/SDH. One byte (J1) of the Path overhead associated with each path in the SONET/SDH frame is used to carry information identifying the originating Path Terminating Equipment (PTE).

Where you configure the Path Trace identifier depends on the framing (SDH or SONET) and the AUG mapping. In SDH with AU-4 mapping, the Path Trace identifier is configured at the SONET controller level. In SDH with AU-3 mapping or in SONET framing, the Path Trace identifier is configured at the path level.

In accordance with SONET and SDH standard requirements, the Path Trace message you enter is manipulated as follows:

If you select a message length of 16, the actual message length can be up to 15 characters. An additional byte, prepended to the message, contains the result of a CRC7 calculated on the message. If the actual message text is fewer than 15 characters, the message text is padded to its full length with NULL characters.

If you select a message length of 64 and the actual message text is fewer than 62 characters, the message text is padded with NULL characters. The last two byte positions, 63 and 64, are always CR/LF (0x0D/0x0A).

Examples

The following example shows J1 configuration in SDH framing with AU-4 AUG mapping. The first overhead j1 command sets the message length to 16; the second overhead j1 command specifies the message text:

Router(config-controller)# au-4 1 overhead j1 length 16
Router(config-controller)# au-4 1 overhead j1 message metro_SF
Router(config-controller)#

The following example shows J1 configuration in SDH framing with AU-3 AUG mapping. The first overhead j1 command sets the message length to 16; the second overhead j1 command specifies the message text:

Router(config)# controller sonet 4/0
Router(config-controller)# au-3 3
Router(config-ctrlr-au3)# overhead j1 length 16
Router(config-ctrlr-au3)# overhead j1 message metro_LA
Router(config-ctrlr-au3)# 

The following example shows J1 configuration in SONET framing in STS-1 mode. The first overhead j1 command sets the message length to 16; the second overhead j1 command specifies the message text:

Router(config)# controller sonet 4/0
Router(config-controller)# sts-1 3
Router(config-ctrlr-sts1)# overhead j1 length 64
Router(config-ctrlr-sts1)# overhead j1 message metro_washington gsr_0057/4/3
Router(config-ctrlr-sts1)# 

Related Commands

Command
Description

overhead c2

Sets the SONET/SDH Path Signal Label value.

overhead j0

Specifies the Section (RS) Trace identifier (J0).

overhead s1s0

Sets the values of the S1 and S0 bits of H1 Administrative Unit (AU) pointer byte.


overhead s1s0

To set the values of the S1 and S0 bits of H1, use the overhead s1s0 controller configuration command. To restore the default value, use the no form of this command.

overhead s1s0 number

no overhead s1s0 number

Syntax Description

s1s0

Specifies bits S1 and S0 of H1.

number

Specifies bit value in the range from 0 to 3 (00 to 11).


Defaults

The default is 0 for SONET framing and 2 for SDH framing.

Command Modes

Controller configuration

Command History

Release
Modification

12.0(17)S

This command was introduced to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

The S1 and S0 bits are located in the H1 Administrative Unit (AU) pointer byte, bit locations 5 and 6. For the Two-port STM-1/OC-3 Channelized E1/T1 line card, the values for these bits are set automatically according to the framing type selected for the SONET port (00 for SONET; 10 for SDH). While the settings for these bits rarely need changing, you can change the values to ensure operability with older or nonstandard equipment, or to ensure operability in one of the countries that uses these bit values differently. For example, SDH equipment in Australia might use the value 01.

Examples

The following example sets the S1 and S0 bits to 2:

Router(config-controller)# overhead s1s0 2
Router(config-controller)#

Related Commands

Command
Description

overhead c2

Sets the SONET/SDH Path Signal Label value.

overhead j0

Specifies the Section (RS) Trace identifier (J0).

overhead j1

Configures the message length and the message text of the STS/High Order Path Trace identifier (J1).


report

To enable reporting of selected alarm and signal events, use the report controller configuration command. To disable reporting of alarm and signal events, use the no form of this command.

report {all | event}

no report {all | event}

Syntax Description

all

Enables all of the available alarm and signal events (see Table 1).

event

Enables reporting for the alarm or signal events listed in Table 1. The following alarm and signal events individually: pais, plm, prdi, sd-ber, lrdi, and lais.


Defaults

The following alarm and signal events are enabled and reported by default: slos, slof, plop, lom, b1-tca, b2-tca, b3-tca, and sf-ber.

Command Modes

Controller configuration

Command History

Release
Modification

12.0(17)S

This command was introduced to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Table 1 lists the supported SONET/SDH alarm and signal events.

Table 1 SONET/SDH Alarm and Signal Events

Alarm/Signal
SONET Description
SDH Description

b1-tca

B1 BER Threshold Crossing Alarm

B1 BER Threshold Crossing Alarm

b2-tca

B2 BER Threshold Crossing Alarm

B2 BER Threshold Crossing Alarm

b3-tca

B3 BER Threshold Crossing Alarm

B3 BER Threshold Crossing Alarm

lais

Line Alarm Indication Signal (AIS-L)

Multiplexer Section Alarm Indication Signal (MS-AIS)

lom

Loss of Multiframe VT (LOM-V)

Loss of Multiframe (LOM)

lrdi

Line Remote Defect Indication (RDI-L)

Multiplexer Section Remote Defect Indication (MS-RDI)

pais

Path Alarm Indication Signal, or Alarm Indication Signal—Path (AIS-P)

Administrative Unit Alarm Indication Signal (AU-AIS)

plm

Path Payload Label Mismatch, or Payload Label Mismatch—Path (PLM-P)

High Order Path Payload Label Mismatch (HP-PLM)

plop

Path Loss of Pointer, or Loss of Pointer—Path (LOP-P)

Administrative Unit Loss of Pointer (AU-LOP)

prdi

Path Remote Defect Indication, or Remote Defect Indication—Path (RDI-P)

High Order Path Remote Defect Indication (HP-RDI)

puneq

Path Unequipped (UNEQ-P)

High Order Path Unequipped (HP-UNEQ)

sd-ber

Line BIP BER in excess of the Signal Degrade (SD) threshold

Multiplexer Section BIP BER in excess of the Signal Degrade (SD) threshold

sf-ber

Line BIP BER in excess of the Signal Fail (SF) threshold

Multiplexer Section BIP BER in excess of the Signal Fail (SF) threshold

slof

Section Loss of Frame (LOF)

Regenerator Section Loss of Frame (LOF)

slos

Section Loss of Signal (LOS)

Regenerator Section Loss of Signal (LOS)


Examples

The following example enables reporting for pais for port 1 of the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 3 of a Cisco 12000 series Internet Router:

Router(config)# controller sonet 3/1
Router(config-controller)# report pais

Related Commands

Command
Description

threshold

Sets threshold values for the BER Threshold Crossing Alarms available for the Two-port STM-1/OC-3 Channelized E1/T1 line card.


show controllers sonet

To display information that is specific to SONET controllers in a Cisco 12000 series Internet Router, use the show controllers sonet privileged EXEC command.

SDH framing and AU-4 AUG mapping

show controllers sonet slot/port.au-4-number/tug-3-number/tug-2-number/e1-line-number [brief | tabular]

SDH framing and AU-3 AUG mapping

show controllers sonet slot/port.au-3-number/tug-2-number/t1-number [brief | tabular]

SONET framing and CT3 mode

show controllers sonet slot/port.sts1-number/t1-number [brief | tabular]

SONET framing and VT-15 mode

show controllers sonet slot/port.sts1-number/vtg-number/t1-number [brief | tabular]

Syntax Description

slot

The chassis slot where the Two-port STM-1/OC-3 Channelized E1/T1 line card is installed.

port

The physical port on the Two-port STM-1/OC-3 Channelized E1/T1 line card. Either 0 or 1.

au-4-number

Always 1 for this line card.

tug-3-number

A number in the range from 1 to 3.

au-3-number

A number in the range from 1 to 3.

tug-2-number

A number in the range from 1 to 7.

e1-line-number

A number in the range from 1 to 3.

t1-line-number

A number in the range from 1 to 4 (in ct3 mode, where a channelized T3 is mapped into the STS-1, t1-line-number is a number in the range from 1 to 28).

sts1-number

A number in the range from 1 to 3.

vtg-number

A number in the range from 1 to 7.

brief

Displays limited information for a SONET port or specific line.

tabular

Displays information for a SONET port or specific line in tabular format.


Command Modes

Privileged EXEC

Command History

Release
Modification

11.2 GS

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Examples

The following partial output example from the show controllers sonet slot/port privileged EXEC command shows alarm and event information for the second SONET controller on the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 4 of a Cisco 12000 series Internet Router:

Router# show controllers sonet 4/0

SONET 4/0 is up. (Configured for Locally Looped)  Hardware is GSR 2 port
STM1/OC3 (channelized)
  Applique type is Channelized OCx interface
  Clock Source is Line
Medium info:
  Type: Sonet, Line Coding: NRZ, Line Type: Short SM
SECTION:
  LOF = 1          LOS = 1                           BIP(B1) = 151620457
LINE:
  AIS = 1          RDI = 0          REI = 8          BIP(B2) = 30
Active Defects: None
Active Alarms: None
Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA B3-TCA
BER thresholds:  SF = 10e-3  SD = 10e-6
TCA thresholds:  B1 = 10e-6  B2 = 10e-6  B3 = 10e-6
High Order Path:

PATH 1:
  AIS = 1          RDI = 1          REI = 9          BIP(B3) = 18
  LOP = 0          PSE = 4          NSE = 0          NEWPTR = 1
  LOM = 0          PLM = 1          UNEQ = 0
Active Defects: None

S1S0 = 00, C2 = 02

PATH TRACE BUFFER : STABLE

  52 6F 75 74 65 72 34 2F  30 2F 31 00 00 00 00 00    Router4/0/1.....
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00    ................
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00    ................
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 0D 0A    ................

PATH 2:
  AIS = 1          RDI = 1          REI = 11         BIP(B3) = 16
  LOP = 0          PSE = 4          NSE = 0          NEWPTR = 0
  LOM = 0          PLM = 1          UNEQ = 0
Active Defects: None

S1S0 = 00, C2 = 04

PATH TRACE BUFFER : STABLE

  52 6F 75 74 65 72 34 2F  30 2F 32 00 00 00 00 00    Router4/0/2.....
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00    ................
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00    ................
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 0D 0A    ................

PATH 3:
  AIS = 1          RDI = 1          REI = 5          BIP(B3) = 11
  LOP = 0          PSE = 4          NSE = 0          NEWPTR = 0
  LOM = 0          PLM = 1          UNEQ = 0
Active Defects: None

S1S0 = 00, C2 = 04

PATH TRACE BUFFER : STABLE

  52 6F 75 74 65 72 34 2F  30 2F 33 00 00 00 00 00    Router4/0/3.....
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00    ................
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00    ................
  00 00 00 00 00 00 00 00  00 00 00 00 00 00 0D 0A    ................

OC3.STS1 4/0.1 is up.  Hardware is GSR 2 port STM1/OC3 (channelized)
  Applique type is VT1.5 in STS-1

 STS-1 1, VTG 1, T1 1 (VT1.5 1/1/1) is up
  timeslots: 1-24
  FDL per AT&T 54016 spec.
  No alarms detected.
  Framing is ESF, Clock Source is Internal
  BERT test result (running)
     Test Pattern : 2^20-QRSS, Status : Sync, Sync Detected : 1
     Interval : 5 minute(s), Time Remain : 4 minute(s)
     Bit Errors (since BERT started): 0 bits,
     Bits Received (since BERT started): 112 Mbits
     Bit Errors (since last sync): 0 bits
     Bits Received (since last sync): 112 Mbits
  Data in current interval (117 seconds elapsed):
     0 Line Code Violations, 5 Path Code Violations
     0 Slip Secs, 1 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     2 Errored Secs, 1 Bursty Err Secs, 1 Severely Err Secs
     8 Unavail Secs, 0 Stuffed Secs

(Additional display text is not shown.)

The following partial output example from the show controllers sonet slot/port brief privileged EXEC command shows limited information about the first SONET controller on the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 3 of a Cisco 12000 series Internet Router:

Router# show controllers sonet 3/0 brief

SONET 3/0 is up. (Configured for Locally Looped)  Hardware is GSR 2 port
STM1/OC3 (channelized)
  Applique type is Channelized OCx interface
  Clock Source is Line, AUG mapping is AU4.
Medium info:
  Type: SDH, Line Coding: NRZ, Line Type: Short SM
Regenerator Section:
  LOF = 0          LOS = 0                           BIP(B1) = 0
Multiplex Section:
  AIS = 0          RDI = 0          REI = 0          BIP(B2) = 0
Active Defects: None
Active Alarms: None
Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA B3-TCA
BER thresholds:  SF = 10e-3  SD = 10e-6
TCA thresholds:  B1 = 10e-6  B2 = 10e-6  B3 = 10e-6
High Order Path:

PATH 1:
  AIS = 0          RDI = 0          REI = 15         BIP(B3) = 11
  LOP = 0          PSE = 4          NSE = 0          NEWPTR = 1
  LOM = 0          PLM = 0          UNEQ = 0
Active Defects: None

S1S0 = 02, C2 = 02

PATH TRACE BUFFER : STABLE
CRC-7: 0xF2 OK
  52 6F 75 74 65 72 33 2F  30 2F 31 00 00 00 00       Router3/0/1....

 STM1.AU4 3/0.1 is up.  Hardware is GSR 2 port STM1/OC3 (channelized)
  Applique type is C12 in TUG-3 in AU-4

 AU-4 1, TUG-3 1, TUG-2 1, E1 1 (C-12 1/1/1/1) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal
  BERT test result (running)
     Test Pattern : 2^15, Status : Sync, Sync Detected : 1
     Interval : 5 minute(s), Time Remain : 2 minute(s)
     Bit Errors (since BERT started): 0 bits,
     Bits Received (since BERT started): 311 Mbits
     Bit Errors (since last sync): 0 bits
     Bits Received (since last sync): 311 Mbits

 AU-4 1, TUG-3 1, TUG-2 1, E1 2 (C-12 1/1/1/2) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 1, TUG-2 1, E1 3 (C-12 1/1/1/3) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 1, TUG-2 2, E1 1 (C-12 1/1/2/1) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 1, TUG-2 2, E1 2 (C-12 1/1/2/2) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 1, TUG-2 2, E1 3 (C-12 1/1/2/3) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal
.
.
.
AU-4 1, TUG-3 2, TUG-2 7, E1 1 (C-12 1/2/7/1) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 2, TUG-2 7, E1 2 (C-12 1/2/7/2) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 2, TUG-2 7, E1 3 (C-12 1/2/7/3) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 3, TUG-2 1, E1 1 (C-12 1/3/1/1) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 3, TUG-2 1, E1 2 (C-12 1/3/1/2) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 3, TUG-2 1, E1 3 (C-12 1/3/1/3) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal
.
.
.
AU-4 1, TUG-3 3, TUG-2 7, E1 1 (C-12 1/3/7/1) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 3, TUG-2 7, E1 2 (C-12 1/3/7/2) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

 AU-4 1, TUG-3 3, TUG-2 7, E1 3 (C-12 1/3/7/3) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal

(Additional display text is not shown.)

By adding specific T1 or E1 line information to the preceding show controllers sonet slot/port brief command, you can show limited output for the specific line that you specify.

Router# show controllers sonet 3/1.1/1/1/1 brief

SONET 3/1 is up.
 Path mode C12

 AU-4 1, TUG-3 1, TUG-2 1, E1 1 (C-12 1/1/1/1) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal
Router# 

By adding specific T1 or E1 line information to the show controllers sonet slot/port tabular command, you can show output for the specific line that you specify in tabular format.

Router# show controllers sonet 3/1.1/1/1/1 tabular

SONET 3/1 is up.
 Path mode C12

 AU-4 1, TUG-3 1, TUG-2 1, E1 1 (C-12 1/1/1/1) is up
  timeslots: 1-31
  No alarms detected.
  Framing is crc4, Clock Source is Internal
  INTERVAL      LCV   PCV   CSS  SELS   LES    DM    ES   BES   SES   UAS    SS
  01:01-01:03     0     0     0     0     0     0     0     0     0     0     0
  00:46-01:01     0     0     0     0     0     0     0     0     0     0     0
  00:31-00:46     0     0     0     0     0     0     0     0     0     0     0
  00:16-00:31     0     0     0     0     0     0     0     0     0     0     0
  00:01-00:16     0     0     0     0     0     0     0     0     0     0     0
  Total           0     0     0     0     0     0     0     0     0     0     0
Router# 

show interfaces serial

To display information about a serial interface configured on a Two-port STM-1/OC-3 Channelized E1/T1 line card in a Cisco 12000 series Internet Router, use the show interfaces serial privileged EXEC command.

SDH framing and AU-4 AUG mapping

show interfaces serial slot/port.au-4-number/tug-3-number/tug-2-number/e1-line-number

SDH framing and AU-3 AUG mapping

show interfaces serial slot/port.au-3-number/tug-2-number/t1-number

SONET framing and CT3 mode

show interfaces serial slot/port.sts1-number/t1-number

SONET framing and VT-15 mode

show interfaces serial slot/port.sts1-number/vtg-number/t1-number

Syntax Description

slot

The chassis slot where the Two-port STM-1/OC-3 Channelized E1/T1 line card is installed.

port

The physical port on the Two-port STM-1/OC-3 Channelized E1/T1 line card. Either 0 or 1.

au-4-number

Always 1 for this line card.

tug-3-number

A number in the range from 1 to 3.

au-3-number

A number in the range from 1 to 3.

tug-2-number

A number in the range from 1 to 7.

e1-line-number

A number in the range from 1 to 3.

t1-line-number

A number in the range from 1 to 4 (in ct3 mode, where a channelized T3 is mapped into the STS-1, t1-line-number is a number in the range from 1 to 28).

sts1-number

A number in the range from 1 to 3.

vtg-number

A number in the range from 1 to 7.


Command Modes

Privileged EXEC

Command History

Release
Modification

10.0

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Examples

The following partial output example from the show interfaces serial slot/port privileged EXEC command shows interface information for the second SONET controller on the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 3 of a Cisco 12000 series Internet Router:

Router# show interfaces serial 3/1.1/1/1:1

Serial3/1.1/1/1:1 is up, line protocol is up (looped)
  Hardware is Channelized Sonet/SDH to T1/E1
  Internet address is 10.0.0.1/24
  MTU 1500 bytes, BW 1472 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, crc 16, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:01, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Queueing strategy: fifo
  Output queue 0/40, 0 drops; input queue 0/75, 0 drops
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     107 packets input, 8148 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 12 abort
     107 packets output, 8148 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 output buffer failures, 0 output buffers swapped out
     2 carrier transitions no alarm present
  Timeslot(s) Used: 1-23, Transmitter delay is 0 flags
  non-inverted data

(Additional display text is not shown.)

Related Commands

Command
Description

clear counters serial

Clear the counters for a serial interface.

clear interface serial

Reset the hardware logic for a serial interface.


sts-1

To configure an STS-1, use the sts-1 controller configuration command to enter the STS-1 path configuration mode. To remove an STS-1 configuration, use the no form of this command.

sts-1 number

no sts-1 number

Syntax Description

number

A number in the range from 1 to 3.


Defaults

No default behavior or values.

Command Modes

Controller configuration

Command History

Release
Modification

12.0(17)S

This command was introduced.


Usage Guidelines

Under SONET framing, each of the STS-1 paths of STS-m (where m is the SONET STS level) can be configured to carry a set of T1s mapped into either a VT1.5 signal or a DS3 signal. The DS3 signal itself will carry a set of T1s (thus becoming a channelized T3, or CT3).

From the STS-1 path configuration mode, you can use the mode command to configure the mode of operation to be vt-15 (Virtual Tributary Group structure VT1.5, which is used for DS1 transport) or ct3 (channelized T3).

Examples

The following example selects ct3 as the STS-1 mode of operation:

Router(config)# controller sonet 4/0
Router(config-controller)# framing sonet
Router(config-controller)# sts-1 3
Router(config-ctrlr-sts1)# mode ct3

Related Commands

Command
Description

framing (controller)

Determine whether the port is to be used in SONET mode or SDH mode.


t1 bert pattern

To send a BERT pattern on a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the t1 bert pattern path configuration command from the command mode that is appropriate to your channelized configuration. To disable a BER test, use the no form of this command from the command mode that is appropriate to your channelized configuration.

C-11 mode of operation (SDH framing; AU-3 AUG mapping)

tug-2 tug-2-number t1 t1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

no tug-2 tug-2-number t1 t1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

VT1.5 mode of operation (SONET framing; vt-15 mode)

vtg vtg-number t1 t1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

no vtg vtg-number t1 t1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

CT3 mode of operation (SONET framing; ct3 mode)

t1 t1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

no t1 t1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

Syntax Description

tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.

2^11

(Optional) Pseudo-random repeating pattern that is 2,048 bits long.

2^15

(Optional) A pseudorandom repeating pattern that is 32767 bits long, per ITU-T O.151. In accordance with O.151, this test pattern is inverted.

2^20-QRSS

(Optional) A pseudorandom repeating pattern that is 1048575 bits long, per ITU-T O.151.

interval time

Specifies the duration of the BER test. The interval can be a value in the range from 1 to 14400 minutes (240 hours).


Defaults

No BER test is performed.

Command Modes

In c-11 mode, AU-3 path configuration.

In vt-15 mode, STS-1 path configuration.

In ct3 mode, STS-1 path configuration.

Command History

Release
Modification

11.3

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Bit error rate test (BERT) circuitry is built into the Two-port STM-1/OC-3 Channelized E1/T1 line card. The Two-port STM-1/OC-3 Channelized E1/T1 supports the following pseudorandom test patterns:

2^11—A pseudorandom repeating pattern that is 2048 bits long.

2^15—A pseudorandom repeating pattern that is 32767 bits long, per ITU-T O.151. In accordance with O.151, this test pattern is inverted.

2^20 QRSS—A pseudorandom repeating pattern that is 1048575 bits long, per ITU-T O.151.

With BER tests, you can accurately assess the number of errors on an T1 link and diagnose signal problems in the field.

Both the total number of error bits transmitted and the total number of bits received are available for analysis. You can set the testing period from 1 minute to 14,400 minutes (240 hours). You can also retrieve the error statistics anytime during the BER test.

When running a BER test, your system expects to receive the same pattern that it is transmitting. To help ensure this, two common options are available:

Use a loopback somewhere in the link or network.

Configure remote testing equipment to transmit the same BER test pattern at the same time.

To configure a BER test on T1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the STS-1 or AU-3.


Note The BER test runs over the currently configured framing option for the specified T1 line (ESF or SF). Before running a BER test, be sure to configure the framing option that is appropriate for your application.


To view the BERT results, use the show controllers sonet privileged EXEC command. The BERT results portion of the command output includes the following information:

Type of BER test pattern selected

Status of the test

Interval selected

Time remaining on the test

Total bit errors

Total bits received

You can view the results of a BER test at the following times:

After you terminate the test using the no form of the t1 bert pattern path configuration command

After the test runs completely

Anytime during the test (in real time)

Examples

The following is an example in vt-15 mode of how to send a BERT pseudorandom pattern of 2^11 through T1 line 1 for 5 minutes:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 bert pattern 2^11 interval 5
Router(config-ctrlr-sts1)# 

Related Commands

Command
Description

t1 framing

Specify the T1 framing format for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

show controllers sonet

Displays information that is specific to SONET controllers in a Cisco 12000 series Internet Router.


t1 channel-group timeslots

To configure a logical channel group for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the t1 channel-group timeslots configuration command from the command mode that is appropriate to your channelized configuration. To remove a channel group, use the no form of this command from the command mode that is appropriate to your channelized configuration.

C-11 mode of operation (SDH framing; AU-3 AUG mapping)

tug-2 tug-2-number t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

no tug-2 tug-2-number t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

VT1.5 mode of operation (SONET framing; vt-15 mode)

vtg vtg-number t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

no vtg vtg-number t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

CT3 mode of operation (SONET framing; ct3 mode)

t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

no t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 | 64}]

Syntax Description

tug-2 tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

t1 t1-line-number

Specifies the T1 link being configured; a number in the range from 1 to n, where n depends on the selected mode of operation:

In c-11 mode, n = 4

In vt-15 mode, n = 4

In ct3 mode, n = 28

channel-group channel-group-number

Defines a logical channel group; a number in the range from 0 to 23 that identifies the set of timeslots allocated to this n x DS0 channel in the channelized T1 line (where n ranges from 1 to 24 timeslots).

timeslots list-of-timeslots

Combination of subranges within the range from 1 to 24 (each subrange is a list of timeslots that makes up the T1 line).

speed {56 | 64}

(Optional) Sets the DS0 speed to either 56 or 64 kbps. The default speed is 64 kbps.


Defaults

No default behavior or values.

Command Modes

In c-11 mode, AU-3 path configuration.

In vt-15 mode, STS-1 path configuration.

In ct3 mode, STS-1 path configuration.

Command History

Release
Modification

11.3

This command was introduced as the t1 timeslot command.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

To configure a T1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the STS-1 or AU-3.


Note After a T1 channel group is configured, it appears to the Cisco IOS software as a serial interface; therefore, all the configuration commands for a serial interface are available, but not all commands are applicable to the E1 channel group.

All the encapsulation formats, such as PPP, HDLC, and Frame Relay are applicable to the configured T1 channel group. Be sure that you are in serial interface configuration mode when you set the encapsulation format.

All the switching types that are applicable to a serial interface are also applicable to the configured T1 channel group.


Examples

The following example shows the process of configuring a logical channel group in c-11 mode. The first T1 line in the fourth TUG-2 group is assigned to logical channel group 15 with channelized timeslots 1 to 5, and 20 to 23:

Router(config)# controller sonet 6/0
Router(config-controller)# au-3 1
Router(config-ctrlr-au3)# tug-2 4 t1 1 channel-group 15 timeslots 1-5, 20-23
Router(config-ctrlr-au3)# 

The following example shows the process of configuring a logical channel group in vt-15 mode. The first T1 line is assigned to logical channel group 15 with channelized timeslots 1 to 5, and 20 to 23:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 1 t1 1 channel-group 15 timeslots 1-5, 20-23
Router(config-ctrlr-sts1)# 

The following example shows the process of configuring a logical channel group in ct3 mode. The first T1 line is assigned to logical channel group 15 with channelized timeslots 1 to 5, and 20 to 23:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# t1 1 channel-group 15 timeslots 1-5, 20-23
Router(config-ctrlr-sts1)# 

t1 clock source

To set the internal or line (network) clock source for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the t1 clock source configuration command from the command mode that is appropriate to your channelized configuration. To restore the default clock source, use the no form of this command from the command mode that is appropriate to your channelized configuration.

C-11 mode of operation (SDH framing; AU-3 AUG mapping)

tug-2 tug-2-number t1 t1-line-number clock source {internal | line}

no tug-2 tug-2-number t1 t1-line-number clock source

VT1.5 mode of operation (SONET framing; vt-15 mode)

vtg vtg-number t1 t1-line-number clock source {internal | line}

no vtg vtg-number t1 t1-line-number clock source

CT3 mode of operation (SONET framing; ct3 mode)

t1 t1-line-number clock source {internal | line}

no t1 t1-line-number clock source

Syntax Description

tug-2 tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

t1 t1-line-number

Specifies the T1 link being configured; a number in the range from 1 to n, where n depends on the selected mode of operation:

In c-11 mode, n = 4

In vt-15 mode, n = 4

In ct3 mode, n = 28

internal | line

Defines the clock source for the T1 line. The default T1 line clock source is internal.


Defaults

Internal

Command Modes

In c-11 mode, AU-3 path configuration.

In vt-15 mode, STS-1 path configuration.

In ct3 mode, STS-1 path configuration.

Command History

Release
Modification

11.3

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

To configure a T1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the STS-1 or AU-3.


Note On a T1 circuit, one end must provide the clock source by using the internal clock source. The other end of the circuit can use either line or internal as the clock source.


Examples

The following example shows the process of configuring the T1 clock source in vt-15 mode. Internal clocking is selected for the first T1 line in the fourth VTG:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 clock source internal
Router(config-ctrlr-sts1)# 

The following example shows the process of configuring line clocking in vt-15 mode. Line clocking is selected for the first T1 line in the fourth VTG:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 clock source line
Router(config-ctrlr-sts1)# 

Related Commands

Command
Description

clock source (controller)

Specifies the clock source for the selected OC-3/STM-1 port on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

t3 clock source

Sets the clock source for the selected T3 link.


t1 fdl ansi

To enable 1-second transmissions of performance reports through the Facility Data Link (FDL) for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the t1 fdl ansi path configuration command from the command mode that is appropriate to your channelized configuration. To disable remote performance reports, use the no form of this command from the command mode that is appropriate to your channelized configuration.

C-11 mode of operation (SDH framing; AU-3 AUG mapping)

tug-2 tug-2-number t1 t1-line-number fdl ansi

no tug-2 tug-2-number t1 t1-line-number fdl ansi

VT1.5 mode of operation (SONET framing; vt-15 mode)

vtg vtg-number t1 t1-line-number fdl ansi

no vtg vtg-number t1 t1-line-number fdl ansi

CT3 mode of operation (SONET framing; ct3 mode)

t1 t1-line-number fdl ansi

no t1 t1-line-number fdl ansi

Syntax Description

tug-2 tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

t1 t1-line-number

Specifies the T1 link being configured; a number in the range from 1 to n, where n depends on the selected mode of operation:

In c-11 mode, n = 4

In vt-15 mode, n = 4

In ct3 mode, n = 28


Defaults

Transmission of performance reports is disabled.

Command Modes

In c-11 mode, AU-3 path configuration.

In vt-15 mode, STS-1 path configuration.

In ct3 mode, STS-1 path configuration.

Command History

Release
Modification

11.3

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

To configure performance reporting on a T1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the STS-1 or AU-3.

You can use this command only when the T1 framing is ESF. The Two-port STM-1/OC-3 Channelized E1/T1 line card supports the reporting of controlled slip seconds (CSS). Controlled slip seconds are reported from the far end only when a network payload loopback is set.


Note If you do not first enable remote performance data with the t1 t1-line-number fdl ansi command, the following message is displayed:
T1 1 - Remote Performance Data (Not available)


Examples

The following example shows how to enable performance reports for a T1 line in vt-15 mode:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 fdl ansi
Router(config-ctrlr-sts1)# 

Related Commands

Command
Description

t1 framing

Specifies the T1 framing format for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.


t1 framing

To specify the T1 framing format for a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the t1 framing configuration command from the command mode that is appropriate to your channelized configuration. To restore the default framing type, use the no form of this command from the command mode that is appropriate to your channelized configuration.

C-11 mode of operation (SDH framing; AU-3 AUG mapping)

tug-2 tug-2-number t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

no tug-2 tug-2-number t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

VT1.5 mode of operation (SONET framing; vt-15 mode)

vtg vtg-number t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

no vtg vtg-number t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

CT3 mode of operation (SONET framing; ct3 mode)

t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

no t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

Syntax Description

tug-2 tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

t1 t1-line-number

Specifies the T1 link being configured; a number in the range from 1 to n, where n depends on the selected mode of operation:

In c-11 mode, n = 4

In vt-15 mode, n = 4

In ct3 mode, n = 28

esf | sf [hdlc-idle {0x7E | 0xFF}]}

Defines the type of framing for the T1 line: Extended Super Frame (ESF) or Super Frame (SF). The default framing format is Extended Super Frame (ESF). Super Frame format offers the hdlc-idle option, which can be set to use either 0x7E or 0xFF as the HDLC idle pattern.


Defaults

Extended Super Frame (ESF)

Command Modes

In c-11 mode, AU-3 path configuration.

In vt-15 mode, STS-1 path configuration.

In ct3 mode, STS-1 path configuration.

Command History

Release
Modification

11.3

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

To configure a T1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the STS-1 or AU-3.


Note When you select SF framing, consider using the no t1-line-number yellow detection command to turn off yellow alarm detection, because the yellow alarm can be incorrectly detected with SF framing. You can use the [no] t1 t1-line-number yellow {detection | generation} command (where t1-line-number is 1 to 28) to turn the detection or generation of a yellow alarm on and off.


Examples

The following example shows the process of configuring ESF framing in vt-15 mode. ESF framing is selected for the first T1 line in the fourth VTG:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 framing esf
Router(config-ctrlr-sts1)# 

The following example shows the process of configuring SF framing in vt-15 mode. SF framing with an HDLC idle pattern of 0x7E is selected for the first T1 line in the fourth VTG:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 framing sf hdlc-idle 0x7e
Router(config-ctrlr-sts1)# 

t1 loopback

To set a loopback on a T1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the t1 loopback path configuration command from the command mode that is appropriate to your channelized configuration. To remove a loopback, use the no form of this command from the command mode that is appropriate to your channelized configuration.

C-11 mode of operation (SDH framing; AU-3 AUG mapping)

tug-2 tug-2-number t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

no tug-2 tug-2-number t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

VT1.5 mode of operation (SONET framing; vt-15 mode)

vtg vtg-number t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

no vtg vtg-number t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

CT3 mode of operation (SONET framing; ct3 mode)

t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

no t1 t1-line-number loopback [local | network {line | payload} | remote {line fdl {ansi | bellcore} | payload [fdl] [ansi]}]

Syntax Description

tug-2 tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

t1 t1-line-number

Specifies the T1 link being configured; a number in the range from 1 to n, where n depends on the selected mode of operation:

In c-11 mode, n = 4

In vt-15 mode, n = 4

In ct3 mode, n = 28

local

(Optional) Loops the router output data back toward the router at the T1 framer.

network line

(Optional) Selecting network line loops the data back toward the network before the T1 framer.

network payload

(Optional) Selecting network payload sets a loopback that works much like the network line loopback, except that the T1 framing bits are stripped at the receive side of the T1 framer and regenerated at the transmit side of the T1 framer (toward the network).

If the T1 channel is configured for internal clocking and you attempt to set a network payload loopback, you will receive the following warning message:

This channel is configured for Internal clocking. Data integrity in network payload loopback is guaranteed only if the opposite end is configured for Line clocking, or vice versa.

Either the local port should be internal clocking, and the remote port line clocking, or the local port should be line clocking, and the remote port internal clocking.

remote line fdl ansi

(Optional) Enables the remote line facility data link (FDL) ANSI bit loopback on the T1 channel, per the ANSI T1.403 specification; sends a repeating, 16-bit ESF data link code word (00001110 11111111 for ANSI) to the remote end, requesting that it enter into a network line loopback.

remote line fdl bellcore

(Optional) Enables the remote SmartJack loopback on the T1 channel, per the TR-TSY-000312 specification; sends a repeating, 16-bit ESF data link code word (00010010 11111111 for Bellcore) to the remote end, requesting that it enter into a network line loopback.

remote payload [fdl] [ansi]

(Optional) Sends a repeating, 16-bit ESF data link code word (00010100 11111111) to the remote end, requesting that it enter into a network payload loopback. Enables the remote payload Facility Data Link (FDL) ANSI bit loopback on the T1 channel.

You can optionally specify fdl and ansi, but it is not necessary.


Defaults

No loopback is set.

Command Modes

In c-11 mode, AU-3 path configuration.

In vt-15 mode, STS-1 path configuration.

In ct3 mode, STS-1 path configuration.

Command History

Release
Modification

11.1. CA

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

To configure a loopback on a T1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the STS-1 or AU-3.


Note fdl loopback commands are available only for T1 links configured for ESF framing.


Examples

The following example shows how to specify a local loopback for a T1 line in vt-15 mode:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 loopback local
Router(config-ctrlr-sts1)# 

The following example shows how to specify a network line loopback for a T1 line in vt-15 mode:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 loopback network line
Router(config-ctrlr-sts1)# 

The following example shows how to specify a network payload loopback for a T1 line in vt-15 mode:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 loopback network payload
Router(config-ctrlr-sts1)# 

The following example sets a T1 line into remote line fdl ansi loopback:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 loopback remote line fdl ansi
Router(config-ctrlr-sts1)# 

The following example sets a T1 line into remote payload fdl ansi loopback:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# vtg 4 t1 1 loopback remote payload fdl ansi
Router(config-ctrlr-sts1)# 

t3 clock source

To set the clock source for the selected T3 link, use the t3 clock source STS-1 path configuration command. To restore the default clock source, use the no form of this command.

t3 clock source {internal | line}

no t3 clock source

Syntax Description

internal

Specifies that the internal clock source is used. This is the default.

line

Specifies that the network clock source is used.


Defaults

Internal

Command Modes

STS-1 path configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

On a T3 circuit, at least one end must provide the clock source (by using the internal clock source). The other end of the T3 circuit can use either line or internal as the clock source.

Examples

The following example shows how to configure a line clock source:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# mode ct3
Router(config-ctrlr-sts1)# t3 clock source line
Router(config-ctrlr-sts1)# 

The following example shows how to configure an internal clock source:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# mode ct3
Router(config-ctrlr-sts1)# t3 clock source internal
Router(config-ctrlr-sts1)# 





Related Commands

Command
Description

clock source (controller)

Specifies the clock source for the selected OC-3/STM-1 port on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

t1 clock source

Sets the internal or line (network) clock source for a T1 line.


t3 equipment loopback

To enable the Two-port STM-1/OC-3 Channelized E1/T1 line card to respond to remote T3 link loopback commands from the remote T3 equipment, use the t3 equipment loopback STS-1 path configuration command. To return to the default setting, use the no form of this command.

t3 equipment {customer | network} loopback

no t3 equipment {customer | network} loopback

Syntax Description

customer

Configures the Two-port STM-1/OC-3 Channelized E1/T1 line card as customer equipment.

network

Configures the Two-port STM-1/OC-3 Channelized E1/T1 line card as network equipment.


Defaults

Customer equipment

Command Modes

STS-1 path configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Use this command to configure the Two-port STM-1/OC-3 Channelized E1/T1 line card as network equipment or customer equipment so that it operates according to the T1.403 ANSI standard, allowing equipment configured as network equipment to disregard network loopback commands.

Examples

The following example configures the Two-port STM-1/OC-3 Channelized E1/T1 line card to respond to remote T3 link loopback commands from the remote T3 equipment:

Router(config-ctrlr-sts1)# t3 equipment customer loopback 
Router(config-ctrlr-sts1)#

The following example configures the Two-port STM-1/OC-3 Channelized E1/T1 line card to ignore remote T3 link loopback commands:

Router(config-ctrlr-sts1)# t3 equipment network loopback 
Router(config-ctrlr-sts1)#

t3 framing

To specify the framing type for the T3 link, use the t3 framing STS-1 path configuration command. To restore the default framing type, use the no form of this command.

t3 framing [auto-detect | c-bit | m23]

no t3 framing

Syntax Description

auto-detect

Specifies that the line card detects the framing type it receives from the far-end equipment. This is the default.

c-bit

Specifies that the C-bit framing is used as the T3 framing type.

m-23

Specifies that the M23 framing is used as the T3 framing type.


Defaults

auto-detect

Command Modes

STS-1 path configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

The M23 framing type might be referred to as M13 in other technical literature and on test equipment.

Examples

The following example sets m23 as the T3 framing format:

Router(config)# controller sonet 4/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# mode ct3
Router(config-ctrlr-sts1)# t3 framing m23
Router(config-ctrlr-sts1)#

To request that the Two-port STM-1/OC-3 Channelized E1/T1 line card detect the framing type it is receiving from the far end and transmit using that same framing type, set auto-detect framing format as follows:

Router(config)# controller sonet 4/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# mode ct3
Router(config-ctrlr-sts1)# t3 framing auto-detect
Router(config-ctrlr-sts1)#

Related Commands

Command
Description

mode

Specify the mode of operation of an STS-1.


t3 loopback

To set a loopback on a T3 link on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the t3 loopback STS-1 path configuration command. To remove the loopback, use the no form of this command.

t3 loopback [local | network | remote]

no t3 loopback

Syntax Description

local

(Optional) Loops the output data back toward the router at the T3 framer and sends an AIS signal out toward the network.

network

(Optional) Loops the data back toward the network before the T3 framer.

remote

(Optional) Sends a repeating, 16-bit ESF data link code word to the remote end requesting that it enter into a network line loopback.


Defaults

No loopback is set.

Command Modes

STS-1 path configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Before attempting to diagnose a problem in the T3 link, use the show controllers sonet command to verify that the STS-1 path carrying this T3 is free of all defects.


Note Remote loopbacks are only available when you use C-bit parity framing.


Examples

The following example is for a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 6 of the Cisco 12000 series router, and uses the local loopback to diagnose problems with the T3 link when it is isolated from the network cables.

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# mode ct3
Router(config-ctrlr-sts1)# t3 loopback local
Router(config-ctrlr-sts1)# 

The following example shows how to configure the T3 link for network loopback. The T3 link is on a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 6 and port 0 of the Cisco 12000 series Internet Router:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# mode ct3
Router(config-ctrlr-sts1)# t3 loopback network
Router(config-ctrlr-sts1)#

The following example shows how to configure the T3 link for remote loopback. The T3 link is on a Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 6 and port 0 of the Cisco 12000 series Internet Router:

Router(config)# controller sonet 6/0
Router(config-controller)# sts-1 1
Router(config-ctrlr-sts1)# mode ct3
Router(config-ctrlr-sts1)# t3 loopback remote
Router(config-ctrlr-sts1)#

Related Commands

Command
Description

mode

Specify the mode of operation of an STS-1.

t3 framing

Specify the framing type for the T3 link.


threshold

To set threshold values for the BER Threshold Crossing Alarms available for the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the threshold controller configuration command. To disable the threshold values, use the no form of this command.

threshold type value

no threshold type value

Syntax Description

type

One of the thresholds listed in Table 2.

value

A number in the range from 3 to 9 that represents the bit error rate threshold value (10-n, where n is a number in the range from 3 to 9).


Defaults

For TCA thresholds b1-tca, b2-tca, and b3-tca, 10-6

For BER threshold sd-ber, 10-6; for sf-ber, 10-3

Command Modes

Controller configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Table 2 describes the supported threshold types and values.

Table 2 Threshold Values

Threshold
Description
Default Value

b1-tca

B1 BER threshold crossing alarm

10-6

b2-tca

B2 BER threshold crossing alarm

10-6

b3-tca

B3 BER threshold crossing alarm

10-6

sd-ber

Signal degrade (SD) BER threshold

10-6

sf-ber

Signal fail (SF) BER threshold

10-3


Examples

The following example sets the sf-ber threshold value to 5 (10-5):

Router(config-controller)# threshold sf-ber 5

Related Commands

Command
Description

controller sonet

Select the physical port to configure on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

report

Enable reporting of selected alarm and signal event.

show controllers sonet

Displays information that is specific to SONET controllers in a Cisco 12000 series Internet Router.


tug-2 e1 bert pattern

To send a BERT pattern on an E1 line that has been mapped to a TUG-3, use the tug-2 e1 bert pattern TUG-3 configuration command. To stop the BER test, use the no form of this command.

tug-2 tug-2-number e1 e1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

no tug-2 tug-2-number e1 e1-line-number bert pattern [2^11 | 2^15 | 2^20-QRSS] interval time

Syntax Description

tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.

2^11

(Optional) Pseudo-random repeating pattern that is 2,048 bits long.

2^15

(Optional) A pseudorandom repeating pattern that is 32767 bits long, per ITU-T O.151. In accordance with O.151, this test pattern is inverted.

2^20-QRSS

(Optional) A pseudorandom repeating pattern that is 1048575 bits long, per ITU-T O.151.

interval time

Specifies the duration of the BER test. The interval can be a value in the range from 1 to 14400 minutes.


Defaults

No BER test is performed.

Command Modes

TUG-3 configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

Bit error rate test (BERT) circuitry is built into the Two-port STM-1/OC-3 Channelized E1/T1 line card. The Two-port STM-1/OC-3 Channelized E1/T1 supports the following pseudorandom test patterns:

2^11—A pseudorandom repeating pattern that is 2048 bits long.

2^15—A pseudorandom repeating pattern that is 32767 bits long, per ITU-T O.151. In accordance with O.151, this test pattern is inverted.

2^20 QRSS—A pseudorandom repeating pattern that is 1048575 bits long, per ITU-T O.151.

With BER tests, you can accurately assess the number of errors on an E1 link and diagnose signal problems in the field. There is only one BER test circuit for each TUG-3 of an AU-4, which means you can run only one BER test on just one of the 21 E1 channels of the TUG-3 at any time. You can run independent BER tests at the same time on E1 links that belong to different TUG-3s.

Both the total number of error bits transmitted and the total number of bits received are available for analysis. You can set the testing period from 1 minute to 14,400 minutes (240 hours). You can also retrieve the error statistics anytime during the BER test.

When running a BER test, your system expects to receive the same pattern that it is transmitting. To help ensure this, two common options are available:

Use a loopback somewhere in the link or network.

Configure remote testing equipment to transmit the same BER test pattern at the same time.

To configure a BER test for an E1 line on a Two-port STM-1/OC-3 Channelized E1/T1 line card, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the for the TUG-3 of an AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 tug-3 2

To view the BERT results, use the show controllers sonet privileged EXEC command. The BERT results portion of the command output includes the following information:

Type of BER test pattern selected

Status of the test

Interval selected

Time remaining on the test

Total bit errors

Total bits received

You can view the results of a BER test at the following times:

After you terminate the test using the no tug-2 e1 bert pattern TUG-3 configuration command

After the test runs completely

Anytime during the test (in real time)

Examples

The following example shows how to send a BERT pseudorandom pattern of 2^11 through E1 line 1 for 5 minutes:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 bert pattern 2^11 interval 5
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

au-4 tug-3

Enter TUG-3 configuration mode and configure a TUG-2 of the TUG-3.

aug mapping

Specify the AUG mapping when SDH framing is selected.

show controllers sonet

Displays information that is specific to SONET controllers in a Cisco 12000 series Internet Router.


tug-2 e1 channel-group timeslots

To configure a logical channel group on an E1 line, use the tug-2 e1 channel-group timeslots TUG-3 configuration command. To remove a channel group, use the no form of this command.

tug-2 tug-2-number e1 e1-line-number channel-group channel-group-number timeslots lists-of-timeslots

no tug-2 tug-2-number e1 e1-line-number channel-group channel-group-number timeslots lists-of-timeslots

Syntax Description

tug-2 tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1 e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.

channel-group channel-group-number

Defines a logical channel group, identifying the set of timeslots allocated to this n x E0 channel in the channelized E1 line, where n is a timeslot number in the range from 1 to 31.

timeslots list-of-timeslots

Combination of subranges within 1 to 31 (each subrange is a list of timeslots that makes up the E1 line).


Defaults

No default behavior or values.

Command Modes

TUG-3 configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

E1 channels are supported under SDH framing, with AUG mapping set to AU-4. Configuration of the 63 E1s is done for each TUG-3. Each TUG-3 comprises 7 TUG-2s. Each TUG-2 can be configured to carry up to 3 E1s mapped into TU-12s.

To configure an E1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the for the TUG-3 of an AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# framing sdh
Router(config-controller)# aug mapping au-4
Router(config-controller)# au-4 1 tug-3 2
Router(config-ctrlr-tug3)# mode c-12

Note After an E1 channel group is configured, it appears to the Cisco IOS software as a serial interface; therefore, all the configuration commands for a serial interface are available, but not all commands are applicable to the E1 channel group.

All the encapsulation formats, such as PPP, HDLC, and Frame Relay are applicable to the configured E1 channel group. Be sure that you are in serial interface configuration mode when you set the encapsulation format.

All the switching types that are applicable to a serial interface are also applicable to the configured E1 channel group.


Examples

The following example shows the first E1 line in the fourth TUG-2 group being assigned to logical channel group 15 with channelized timeslots 1 to 5, and 20 to 23:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 channel-group 15 timeslots 1-5, 20-23
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

au-4 tug-3

Enter TUG-3 configuration mode and configure a TUG-2 of the TUG-3.

aug mapping

Specify the AUG mapping when SDH framing is selected.

tug-2 e1 unframed

Configure an unframed E1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card.

show controllers sonet

Displays information that is specific to SONET controllers in a Cisco 12000 series Internet Router.


tug-2 e1 clock source

To specify where the clock source is obtained for an E1 line, use the tug-2 e1 clock source TUG-3 configuration command.

tug-2 tug-2-number e1 e1-line-number clock source {internal | line}

Syntax Description

tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.

internal

Specifies that the internal clock source is used. This is the default.

line

Specifies that the network clock source, recovered from the received signal, is used.


Defaults

internal

Command Modes

TUG-3 configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

On an E1 circuit, one end must provide the clock source by using the internal clock source. The other end of the circuit can use either line or internal as the clock source.

To configure an E1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the for the TUG-3 of an AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 tug-3 2

Examples

The following example shows how to instruct E1 line 1 to use an internal clock source:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 clock source internal
Router(config-ctrlr-tug3)# 

The following example shows how to instruct E1 line 1 to use a line clock source:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 clock source line
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

au-4 tug-3

Enter TUG-3 configuration mode and configure a TUG-2 of the TUG-3.

aug mapping

Specify the AUG mapping when SDH framing is selected.

clock source (controller)

Specifies the clock source for the selected OC-3/STM-1 port on the Two-port STM-1/OC-3 Channelized E1/T1 line card.


tug-2 e1 framing

To specify the E1 framing format for an E1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the tug-2 e1 framing TUG-3 configuration command.

tug-2 tug-2-number e1 e1-line-number framing {crc4 | no-crc4}

Syntax Description

tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.

crc4

Sets the framing format to E1 with a 4-bit cyclic redundancy check (PCM31 CRC4). Default framing format is crc4.

no-crc4

Sets the framing format to E1 without a 4-bit cyclic redundancy check (PCM31).


Defaults

crc4

Command Modes

TUG-3 configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

You can configure any of the E1 lines as unframed E1 data lines. An unframed E1 line contains no framing byte in timeslot 0. Unframed E1s are not divided into timeslots, thus allowing the full 2048 kbps bandwidth to be allocated to user data. Having no framing byte nor CRC-4 error detection, unframed E1s offer fewer performance monitoring and alarm detection capabilities than framed E1s.

To configure an E1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the for the TUG-3 of an AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 tug-3 2

Examples

The following example shows how to set crc4 framing format for E1 line 1:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 crc4
Router(config-ctrlr-tug3)# 

The following example shows how to set no-crc4 framing format for E1 line 1:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 no-crc4
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

au-4 tug-3

Enter TUG-3 configuration mode and configure a TUG-2 of the TUG-3.

aug mapping

Specify the AUG mapping when SDH framing is selected.

tug-2 e1 unframed

Configure an unframed E1 line.


tug-2 e1 loopback

To set a loopback on an E1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the tug-2 e1 loopback TUG-3 configuration command. To remove a loopback, use the no form of this command.

tug-2 tug-2-number e1 e1-line-number loopback {local | network {line | payload}}

no tug-2 tug-2-number e1 e1-line-number loopback {local | network {line | payload}}

Syntax Description

tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.

local

Loops the router output data back toward the router at the E1 framer.

network line

Loops the data back toward the network before the E1 framer.

network payload

Sets a loopback that works much like the network line loopback, except that the E1 framing bits are stripped at the receive side of the E1 framer and regenerated at the transmit side of the E1 framer (toward the network).

If the E1 channel is configured for internal clocking and you attempt to set a network payload loopback, you will receive the following warning message:

This channel is configured for Internal clocking. Data integrity 
in network payload loopback is guaranteed only if the opposite 
end is configured for Line clocking, or vice versa.

Either the local port should be internal, and the remote port line, or the local port should be line, and the remote port internal.


Defaults

No loopback is set.

Command Modes

TUG-3 configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

To configure a loopback for an E1 line on a Two-port STM-1/OC-3 Channelized E1/T1 line card, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the for the TUG-3 of an AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 tug-3 2

Examples

The following example shows how to set a local loopback on an E1 line:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 loopback local
Router(config-ctrlr-tug3)# 

The following example shows how to set a network line loopback on an E1 line:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 loopback network line
Router(config-ctrlr-tug3)# 

The following example shows how to set a network payload loopback on an E1 line:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 loopback network payload
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

au-4 tug-3

Enter TUG-3 configuration mode and configure a TUG-2 of the TUG-3.

aug mapping

Specify the AUG mapping when SDH framing is selected.


tug-2 e1 national bits

To configure the national reserve bit pattern for an E1 line on a Two-port STM-1/OC-3 Channelized E1/T1 line card, use the tug-2 e1 national bits TUG-3 configuration command.

tug-2 tug-2-number e1 e1-line-number national bits pattern

Syntax Description

tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.

pattern

A value in the range from 0x0 to 0x1F (hexadecimal) or 0 to 31 (decimal). The default value is 0x1F hexadecimal (or 31 decimal).


Defaults

0x1F hexadecimal (or 31 decimal)

Command Modes

TUG-3 configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

To configure an E1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the for the TUG-3 of an AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 tug-3 2

Examples

The following example sets the national bit pattern to 0x0 on the first E1 line in the fourth TUG-2:

Router(config-ctrlr-tug3)# tug-2 4 e1 1 national bits 0x0
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

au-4 tug-3

Enter TUG-3 configuration mode and configure a TUG-2 of the TUG-3.

aug mapping

Specify the AUG mapping when SDH framing is selected.


tug-2 e1 unframed

To configure an unframed E1 line on the Two-port STM-1/OC-3 Channelized E1/T1 line card, use the tug-2 e1 unframed TUG-3 configuration command. To remove an unframed channel group, use the no form of this command.

tug-2 tug-2-number e1 e1-line-number unframed

no tug-2 tug-2-number e1 e1-line-number unframed

Syntax Description

tug-2-number

Specifies the TUG-2 number in the selected TUG-3; a number in the range from 1 to 7.

e1-line-number

Specifies the E1 link being configured; a number in the range from 1 to 3. A TUG-2 can carry three TU-12s, each of which can carry a channelized E1 frame.


Defaults

No default behavior or values.

Command Modes

TUG-3 configuration

Command History

Release
Modification

12.0(14)S

This command was introduced.

12.0(17)S

This command was modified to support the Two-port STM-1/OC-3 Channelized E1/T1 line card.


Usage Guidelines

You can configure any of the E1 lines as unframed E1 data lines. An unframed E1 line contains no framing byte in timeslot 0. Unframed E1s are not divided into timeslots, thus allowing the full 2048 kbps bandwidth to be allocated to user data. Having no framing byte nor CRC-4 error detection, unframed E1s offer fewer performance monitoring and alarm detection capabilities than framed E1s.

To configure an E1 line, you must enter SONET controller configuration mode and specify the line card slot and port, and then enter the command mode appropriate to the selected framing type and mode of operation for the for the TUG-3 of an AU-4:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 tug-3 2

Note After an unframed E1 logical channel group is configured, it appears to the Cisco IOS software as a serial interface with channel group number zero. The configuration command in the following example creates a serial interface with the following address: interface serial 6/0.1/2/4/1:0.


Examples

The following example shows the first E1 line in the fourth TUG-2 group, second TUG-3, first AU-4 of the first port on the Two-port STM-1/OC-3 Channelized E1/T1 line card in slot 6 being configured as an unframed E1:

Router(config)# controller sonet 6/0
Router(config-controller)# au-4 1 tug-3 2
Router(config-ctrlr-tug3)# tug-2 4 e1 1 unframed
Router(config-ctrlr-tug3)# 

Related Commands

Command
Description

au-4 tug-3

Enter TUG-3 configuration mode and configure a TUG-2 of the TUG-3.

aug mapping

Specify the AUG mapping when SDH framing is selected.

tug-2 e1 channel-group timeslots

Configure a logical channel group on an E1 line.

show controllers sonet

Displays information that is specific to SONET controllers in a Cisco 12000 series Internet Router.


Glossary

ACL—Access Control List. Access lists filter network traffic by controlling whether routed packets are forwarded or blocked at the router's interfaces. The router examines each packet to determine whether to forward or drop the packet, based on the criteria specified within the access lists. See also EACL.

ADM—Add Drop Multiplexer. A multiplexer capable of extracting lower-rate signals from, and inserting lower-rate signals into, a higher-rate multiplexed signal without completely demultiplexing the signal.

AU—Administrative Unit.

AU-n—Administrative Unit-level n (n=3 or 4).

BERT—Bit Error Rate Test. Bit error rate is the probability that a bit error could occur on any given bit on a line.

C-n—Container-level n (n=11, 12, 2, 3, or 4).

CAR—Committed Access Rate. A Cisco IOS software feature that allows a stream of traffic to be rate limited and given a user-specified priority.

COS—Class of Service.

CRC—Cyclic Redundancy Check. A technique for using overhead bits to detect transmission errors.

CT3—Channelized T3.

DMLP—Distributed Multilink PPP.

DRR—Deficit Round Robin. A queuing policy that provides the capability to provide expeditious handling for high priority traffic without starving lower priority traffic.

DS1—Digital Signal Level 1. A U.S. standard for high-speed data transmission over a T1 line at a data rate of 1.544 megabits per second (Mbps).

DS3—Digital Signal Level 3. A U.S. standard for high-speed data transmission over a T3 line at a data rate of 44.736 Mbps.

DSU—Data Service Unit. Part of the customer premises equipment used to interface to a digital circuit. A fancy name for a high speed modem (with data rates of 34 or 45 Mbps).

E1—European digital carrier facility used for transmitting data through the telephone hierarchy. The transmission rate for E1 is 2.048 Mbps.

EACL—Extended Access Lists. Extended form of ACLs; more criteria are available for classifying traffic.

ESF—Extended Super Frame. Framing type used on T1 circuits. It consists of 24 frames of 192 bits each with the 193rd bit providing timing and other functions. ESF is an enhanced version of Super Frame (SF) format.

FEAC—Far End Alarm and Control. A DS3 low speed subchannel.

FDL—Facility Data Link. A 4-Kbps channel provided by the ESF T1 framing format. The FDL performs outside the payload capacity and allows a service provider to check error statistics on terminating equipment without intrusion.

HDLC—High-level Data Link Control. A bit oriented data link control protocol.

LOF—Loss of Frame.

LOS—Loss of Signal.

M13—An ANSI T1.107 framing format that directly multiplexes 28 DS1 signals into a DS3 signal.

M23—An ANSI T1.107 framing format that multiplexes 7 asynchronous DS2 signals into the DS3. Because the C-bits are used for bit stuffing, no CRC, FEBE, or MDL channels are available. Four DS1 signals are then multiplexed into each of the 7 DS2s for a total of 28 DS1s.

MFR—Multilink Frame Relay.

MLP—Multi Link PPP.

MPLS—Multiprotocol Label Switching.

Multilink PPP—Multilink Point-to-Point Protocol (MLP). See RFC 1990.

OC-3—Optical Carrier number 3 - 155 Mbps rate SONET interface.

PPP—Point-to-Point Protocol. See RFC 1661.

Precedence—A 3-bit field within the TOS bits.

QOS—Quality of Service.

RED—Random Early Discard. A congestion management scheme.

RSVP—Resource Reservation Protocol. IP protocol for flow control & QOS control.

SF—Super Frame. A DS1 framing format composed of 12 DS1 frames.

SNMP—Simple Network Management Protocol. Internet standard for remote management of network devices.

SPE—Synchronous Payload Envelope.

STM—Synchronous Transport Module.

STM-N—Synchronous Transport Module-Level N (N x 155.52 Mbps: N = 1, 4, 16, or 64)

STS—Synchronous Transport Signal.

STS-N—Synchronous Transport Signal-Level N (N x 51.84 Mbps: N = 1, 3, 12, 48, or 192)

T1—A digital carrier facility used to transmit a DS1 formatted digital stream at 1.544 Mbps.

T3—A digital carrier facility used to transmit a DS3 formatted digital stream at 44.746 Mbps.

TOS—Type of Service. 8 bits in the IP header governing Quality of Service.

TU-n—Tributary Unit-level n (n=11, 12, 2, or 3).

TUG-n—Tributary Unit Group n (n=2 or 3).

WRED—Weighted RED. A variation of RED.