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Table Of Contents
APS Support on Cisco AS5850 STM-1 Interfaces
Prerequisites for APS Support on Cisco AS5850 STM-1 Interfaces
Information About APS Support on Cisco AS5850 STM-1 Interfaces
Benefits of SONET APS Using an STM-1 Card
How to Configure APS Support on Cisco AS5850 STM-1 Interfaces
Configuring APS Support on the Cisco AS5850
Issuing APS Switch Commands Using CLI
Configuration Examples for APS Support on Cisco AS5850 STM-1 Interfaces
Configuring APS Support and APS Switch Commands on the Cisco AS5850: Example
APS Support on Cisco AS5850 STM-1 Interfaces
This feature provides SONET automatic protection switching (APS) on Cisco AS5850 STM-1 interfaces. SONET APS—also referred to as SDH multiplex section protection (MSP)—refers to the mechanism of providing fault tolerance through fiber cable redundancy in SONET/SDH networks. When the working fiber fails, the protect fiber quickly assumes its traffic load. Some command-line interface (CLI) commands are available to provide a measure of manual intervention in the APS switching process.
Feature History for the APS Support on Cisco AS5850 STM-1 Interfaces Feature
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.
Contents
•Prerequisites for APS Support on Cisco AS5850 STM-1 Interfaces
•Information About APS Support on Cisco AS5850 STM-1 Interfaces
•How to Configure APS Support on Cisco AS5850 STM-1 Interfaces
•Configuration Examples for APS Support on Cisco AS5850 STM-1 Interfaces
Prerequisites for APS Support on Cisco AS5850 STM-1 Interfaces
This feature assumes familiarity with the ITU-T G.841 Types and characteristics of SDH network protection architectures standard.
Information About APS Support on Cisco AS5850 STM-1 Interfaces
To configure SONET APS on the STM-1 card, you should understand the following concepts.
•SONET APS Using an STM-1 Card
•Benefits of SONET APS Using an STM-1 Card
SONET APS Using an STM-1 Card
SONET APS provides the ability to switch fiber cable interfaces—referred to in this feature as ports—on an STM-1 card in a Cisco AS5850. The ability to switch from one SONET port to another SONET port in response to a fiber cut or module failure, signal failure, signal degradation, or manual intervention provides redundancy.
The protection mechanism used for this feature has a linear 1+1 architecture as described in the ITU-T G.841 standard and the Bellcore publication GR-253-CORE, SONET Transport Systems; Common Generic Criteria, Section 5.3. The connection may be bidirectional or unidirectional.
In the 1+1 architecture, a protect port is paired with each working port. Normally, the protect and working ports are connected to a SONET ADM (add/drop multiplexer), which sends the same signal payload to the working and protect ports. Figure 1 shows an APS configuration with the working and protect fibers terminating in SONET ports on the STM-1 card in a Cisco AS5850.
Figure 1 APS Configuration
When SONET APS is configured and a failure is detected on the working fiber, or when switch commands are entered through the command-line interface (CLI), the software switches the traffic to the protect fiber. The software also monitors the health of the protect fiber when APS is enabled and informs the user of any problems. When the protect fiber problem is resolved, normal APS operation is resumed.
Benefits of SONET APS Using an STM-1 Card
The STM-1 card is generally deployed by medium to large service providers who have a need for a larger DS0 capacity. The main benefits of using the STM-1 card over E1 interfaces are an initial lower cost of deployment compared to deploying 63 E1 interfaces, a lower recurring monthly charge, and lower maintenance cost because only one cable is required between the Main Distribution Facility (MDF) and the Cisco AS5850 instead of 63 cables. Service providers who carry voice data do expect to have more protection on an STM-1 port than on an E1 port because the STM-1 port supports a high density of DS0s (1953). Network reliability could be severely impacted if 1953 connections are lost at the same time. SONET APS can provide the fiber protection and network resiliency expected by the service providers. The existing media gateways that support STM-1 already provide APS protection.
How to Configure APS Support on Cisco AS5850 STM-1 Interfaces
This section contains the following tasks:
•Configuring APS Support on the Cisco AS5850 (required)
•Issuing APS Switch Commands Using CLI (optional)
Configuring APS Support on the Cisco AS5850
Perform this task to enable and configure APS on SONET ports on an STM-1 trunk card.
SUMMARY STEPS
1. enable
2. configure terminal
3. controller sonet slot/port
4. main-fiber port {0 | 1}
5. aps protect
6. b2 sd-ber rate
7. b2 sf-ber rate
8. aps unidirectional
9. end
10. show controllers sonet slot/port
DETAILED STEPS
Examples
The following example shows partial output from the show controllers sonet command.
Router# show controllers sonet 1/0SONET 1/0 is up.Applique type is Channelized Sonet/SDHClock Source is Line, AUG mapping is AU4.MSP 1+1 bi-directional enabledProtection fiber (Port 0), No Alarm, traffic in-useWorking fiber (Port 1), No Alarm, traffic not in-useLocal request: No RequestRemote request: No RequestMedium info:Type: SDH, Line Coding: NRZ, Line Type: Short SM...Troubleshooting Tips
•Use the show controllers sonet command and look for any alarms or local and remote request information.
•Check that the ADM is sourcing the SONET clocking.
Issuing APS Switch Commands Using CLI
Perform this task to issue one or more of the optional APS switch commands when the working fiber is active but you want to switch to the protect fiber. The APS switch commands allow a measure of manual intervention in the APS process.
APS Switching Priority Levels
Each APS switch command has a priority level compared to the other APS switch commands and the signal status of the working and protect fibers. Table 1 shows the priority requests from the highest (lockout) to the lowest (manual). The actual decision-based activity performed by the software is quite complex; details are provided in the ITU-T G.841 Types and characteristics of SDH network protection architectures standard.
Table 1 APS Priority Request
Priority Priority Request1
Lockout of protect port
2
Forced switch
3
Signal failure—low priority
4
Signal degradation—low priority
5
Manual switch
SUMMARY STEPS
1. enable
2. aps manual sonet slot/port from {protection | working}
3. aps force sonet slot/port from {protection | working}
4. aps lockout sonet slot/port
5. aps clear sonet slot/port
DETAILED STEPS
Configuration Examples for APS Support on Cisco AS5850 STM-1 Interfaces
This section contains the following configuration example:
•Configuring APS Support and APS Switch Commands on the Cisco AS5850: Example
Configuring APS Support and APS Switch Commands on the Cisco AS5850: Example
In the following example, SONET APS parameters are configured, and APS is enabled on port 1 of an STM-1 card in a Cisco AS5850. A manual APS switching request is configured, and partial output for the show controllers sonet command is displayed.
Router# configure terminalRouter (config)# controller sonet 1/0Router (config-controller)# main-fiber port 1Router (config-controller)# aps protectRouter (config-controller)# b2 sd-ber 7Router (config-controller)# b2 sf-ber 4Router (config-controller)# aps unidirectionalRouter (config-controller)# endRouter# aps manual sonet 1/0 from workingRouter# show controllers sonetSONET 1/0 is up.Applique type is Channelized Sonet/SDHClock Source is Line, AUG mapping is AU4.MSP 1+1 bi-directional enabledProtection fiber (Port 0), No Alarm, traffic in-useWorking fiber (Port 1), No Alarm, traffic not in-useLocal request: Manual Switch/WorkingRemote request: No request...Where to Go Next
For more details about the Cisco AS5850, visit the Cisco AS5850 Universal Gateway Introduction page under the Products and Service section on www.cisco.com.
Additional References
The following sections provide references related to the APS Support on Cisco AS5850 STM-1 Interfaces feature.
Related Documents
Related Topic Document TitleHardware and configuration information for the SDH/STM-1 trunk card
The " SDH/STM-1 Trunk Card" chapter of the Cisco AS5850 Universal Gateway Card Guide
APS and SONET commands: complete command syntax, command mode, defaults, usage guidelines, and examples
Cisco IOS Interface and Hardware Component Command Reference, Release 12.3 T
APS and SONET configuration
Cisco IOS Interface and Hardware Component Configuration Guide, Release 12.3
Standards
MIBs
RFCs
RFCs TitleNo new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.
—
Technical Assistance
Command Reference
This section documents new and modified commands.
aps clear sonet
To remove all externally initiated SONET automatic protection switching (APS) commands configured on a Cisco AS5850, use the aps clear sonet command in privileged EXEC mode.
aps clear sonet slot/port
Syntax Description
slot
Slot number on an STM-1 trunk card.
/port
SONET port number on an STM-1 trunk card. The slash mark is required between the slot argument and the port argument.
Defaults
No APS switch commands are removed.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
Use the aps clear sonet command to remove any SONET APS commands, such as the aps force sonet command, that could switch the working fiber to the protect fiber on an STM-1 trunk card.
This command applies to the Cisco AS5850 universal gateway only.
Examples
The following example shows how to remove all externally initiated SONET APS switch commands:
Router# aps clear sonet 1/0Related Commands
aps force sonet
To force a specified port to switch to the alternate port within a redundant pair unless a request of equal or higher priority is in effect, use the aps force sonet command in privileged EXEC mode.
aps force sonet slot/port from {protection | working}
Syntax Description
Defaults
No port is switched.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
Forced is a defined APS request priority level. The request succeeds if no higher priority request (lockout is the only higher priority request) is posted. The aps force sonet command does not persist after a system restart. The slot and port arguments indicate the SONET interface on which you want to issue the aps force sonet command. The aps force sonet command has a higher priority than any of the signal failures or the aps manual sonet command.
For more information about APS priority requests, see the ITU-T G.841 standard.
This command applies to the Cisco AS5850 universal gateway only.
Examples
The following example shows how to force the protect port in the SONET controller to become an active port:
Router# configure terminalRouter(config)# controller sonet 1/0Router(config-controller)# aps protectRouter(config-controller)# endRouter# aps force sonet 1/0 from workingRelated Commands
aps lockout sonet
To prevent a working port from switching to a protect port unless a request of equal or higher priority is in effect, use the aps lockout sonet command in privileged EXEC mode.
aps lockout sonet slot/port
Syntax Description
slot
Slot number on an STM-1 trunk card.
/port
SONET port number on an STM-1 trunk card. The slash mark is required between the slot argument and the port argument.
Defaults
No lockout exists; that is, a working port is not prevented from switching to a protect port.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
Lockout is defined as the highest APS request priority level.
The aps lockout sonet command does not persist after a system restart. The slot and port arguments indicate the SONET interface from which the protect port is to be locked out. When the specified port is locked out, SONET APS switching from the working port is not allowed.
For more information about APS priority requests, see the ITU-T G.841 standard.
This command applies to the Cisco AS5850 universal gateway only.
Examples
The following example shows how to lock out SONET port 1/0 (prevents SONET APS switching to a protect interface if the working circuit becomes unavailable):
Router# configure terminalRouter(config)# controller sonet 1/0Router(config-controller)# aps protectRouter(config-controller)# endRouter# aps lockout sonet 1/0Related Commands
aps manual sonet
To manually switch to the alternate port within a redundant pair unless a request of equal or higher priority is in effect, use the aps manual sonet command in privileged EXEC mode.
aps manual sonet slot/port from {protection | working}
Syntax Description
Defaults
No port is switched.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
Use the aps manual sonet command to manually switch the active port to the alternate port. For example, you can use this command when you need to perform maintenance on the working port.
Manual is a defined APS request priority level. The request succeeds if no higher priority request is posted. The aps manual sonet command does not persist after a system restart. The slot and port arguments indicate the SONET interface on which you want to issue the aps manual sonet command. The aps manual sonet command has a lower priority than any of the signal failures or the aps force sonet command.
For more information about APS priority requests, see the ITU-T G.841 standard.
This command applies to the Cisco AS5850 universal gateway only.
Examples
The following example shows how to manually switch the working port, SONET port 1/0, to the protect port:
Router# configure terminalRouter(config)# controller sonet 1/0Router(config-controller)# aps protectRouter(config-controller)# endRouter# aps manual sonet 1/0 from workingRelated Commands
aps protect (SONET)
To enable automatic protection switching (APS) on a SONET port in an STM-1 trunk card, use the aps protect command in controller configuration mode. To disable APS on the SONET port, use the no form of this command.
aps protect
no aps protect
Syntax Description
This command has no arguments or keywords.
Defaults
APS is disabled.
Command Modes
Controller configuration
Command History
Usage Guidelines
Use the aps protect command to enable APS on a protect SONET port as a working port if the working port becomes unavailable because of a fiber failure, degradation or loss of channel signal, or manual intervention.
Examples
The following example shows how to enable APS on SONET port 0/1 in an STM-1 trunk card.
Router# configure terminalRouter(config)# controller sonet 1/0Router(config-controller)# aps protectRouter(config-controller)# endRelated Commands
Command Descriptionaps unidirectional
Configures a protect SONET port for unidirectional mode.
show controllers sonet
Displays information about SONET controllers.
aps unidirectional
To configure a protect interface for unidirectional mode, use the aps unidirectional command in controller configuration or interface configuration mode. To return to the default, bidirectional mode, use the no form of this command.
aps unidirectional
no aps unidirectional
Syntax Description
This command has no arguments or keywords.
Defaults
Bidirectional mode
Command Modes
Controller configuration
Interface configurationCommand History
Release Modification11.1 CC
This command was introduced.
12.3(11)T
Support for SONET APS using an STM-1 card was added on the Cisco AS5850.
Usage Guidelines
The aps unidirectional command is configured only on protect interfaces.
Use the aps unidirectional command when you must interoperate with SONET network equipment, add/drop multiplexors (ADMs) that supports unidirectional mode.
Note We recommend bidirectional mode when it is supported by the interconnecting SONET equipment. When the protect interface is configured as bidirectional, the working and protect interfaces must cooperate to switch the transmit and receive SONET channel in a bidirectional fashion. This
happens automatically when the SONET network equipment is in bidirectional mode.Examples
The following example shows how to configure POS interface 3/0/0 for unidirectional mode on a Cisco 12000 series router:
Router# configure terminalRouter(config)# interface pos 3/0/0Router(config-if)# aps unidirectionalRouter(config-if)# aps protect 1 10.7.7.7Router(config-if)# endThe following example shows how to configure SONET port 0/0 for unidirectional mode on a Cisco AS5850 universal gateway using an STM-1 trunk card:
Router# configure terminalRouter(config)# controller sonet 0/0Router(config-controller)# aps protectRouter(config-controller)# aps unidirectionalRouter(config-controller)# endshow controllers sonet
To display information about SONET controllers, use the show controllers sonet command in user EXEC or privileged EXEC mode with the appropriate parameters for the operating mode of the channelized line.
show controllers sonet [slot/port | slot/port.sts1-number/t1-number | slot/port.vtg1-number/ sts1-number/t1-number | slot/port.au-3-number/tug-2-number/t1-number |
slot/port.au-4-number/tug-3-number/tug-2-number/e1-line-number |
slot/port.au-4-number/vc3-number | slot/port:interface-number |
t3 slot/port:t1-line-number] [bert | brief | tabular]Syntax Description
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
You can enter the show controllers sonet command at any time during a BER test.
Examples
The following is sample output from the show controllers sonet command on a T1 line under SONET framing in VT-15 mode. (Table 2 describes the lines in the BER test portion of the output.)
Router# show controllers sonet 4/0.1/1/1 briefOC3.STS1 4/0.1 is up. Hardware is GSR 2 port STM1/OC3 (channelized)Applique type is VT1.5 in STS-1STS-1 1, VTG 1, T1 1 (VT1.5 1/1/1) is uptimeslots: 1-24FDL per AT&T 54016 spec.No alarms detected.Framing is ESF, Clock Source is InternalBERT test result (running)Test Pattern : 2^20-QRSS, Status : Sync, Sync Detected : 1Interval : 5 minute(s), Time Remain : 4 minute(s)Bit Errors (since BERT started): 0 bits,Bits Received (since BERT started): 112 MbitsBit Errors (since last sync): 0 bitsBits Received (since last sync): 112 MbitsTable 2
show controllers sonet Line Descriptions
The following is sample output from the show controllers sonet command for an E1 line under SDH framing with AU-4 AUG mapping.
Router# show controllers sonet 3/0.1/1/3/5SONET 3/0 is up. (Configured for Locally Looped) Hardware is GSR 2 portSTM1/OC3 (channelized)Applique type is Channelized OCx interfaceClock Source is Line, AUG mapping is AU4.Medium info:Type: SDH, Line Coding: NRZ, Line Type: Short SMRegenerator Section:LOF = 0 LOS = 0 BIP(B1) = 0Multiplex Section:AIS = 0 RDI = 0 REI = 0 BIP(B2) = 0Active Defects: NoneActive Alarms: NoneAlarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA B3-TCABER thresholds: SF = 10e-3 SD = 10e-6TCA thresholds: B1 = 10e-6 B2 = 10e-6 B3 = 10e-6High Order Path:PATH 1:AIS = 0 RDI = 0 REI = 15 BIP(B3) = 11LOP = 0 PSE = 4 NSE = 0 NEWPTR = 1LOM = 0 PLM = 0 UNEQ = 0Active Defects: NoneS1S0 = 02, C2 = 02PATH TRACE BUFFER : STABLECRC-7: 0xF2 OK52 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-4AU-4 1, TUG-3 1, TUG-2 1, E1 1 (C-12 1/1/1/1) is uptimeslots: 1-31No alarms detected.Framing is crc4, Clock Source is InternalBERT test result (running)Test Pattern : 2^15, Status : Sync, Sync Detected : 1Interval : 5 minute(s), Time Remain : 5 minute(s)Bit Errors (since BERT started): 0 bits,Bits Received (since BERT started): 95 MbitsBit Errors (since last sync): 0 bitsBits Received (since last sync): 95 MbitsData in current interval (708 seconds elapsed):0 Line Code Violations, 1 Path Code Violations0 Slip Secs, 1 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins1 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs0 Unavail Secs, 0 Stuffed SecsData in Interval 1:0 Line Code Violations, 0 Path Code Violations0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs0 Unavail Secs, 0 Stuffed SecsData in Interval 2:0 Line Code Violations, 0 Path Code Violations0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs0 Unavail Secs, 0 Stuffed SecsData in Interval 3:0 Line Code Violations, 0 Path Code Violations0 Slip Secs, 1 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins1 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs0 Unavail Secs, 0 Stuffed SecsTotal Data (last 3 15 minute intervals):0 Line Code Violations,0 Path Code Violations,0 Slip Secs, 1 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,1 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs0 Unavail Secs, 0 Stuffed SecsThe following is sample output from the show controllers sonet command when AUG mapping is AU-3 and the tabular keyword is specified.
Router# show controllers sonet 2/0.1/1/1 tabular
SONET 2/0/0 is up.Channelized OC-3/STM-1 SMI PAH/W Version : 0.2.3, ROM Version : 1.2FREEDM version : 2, F/W Version : 0.14.0SONET 2/0/0 E1 1/1/1 is downTransmitter is sending LOF Indication (RAI).Receiver has loss of frame.Framing is crc4, Clock Source is internal, National bits are 0x1F.INTERVAL LCV PCV CSS SEFS LES DM ES BES SES UAS SS17:26-17:29 0 0 0 0 0 0 0 0 0 173 017:11-17:26 0 0 0 0 0 0 0 0 0 471 016:56-17:11 0 0 0 0 0 0 0 0 0 0 016:41-16:56 0 0 0 0 0 0 0 0 0 0 016:26-16:41 0 0 0 0 0 0 0 0 0 216 016:11-16:26 0 0 0 0 0 0 0 0 0 225 0Total 0 0 0 0 0 0 0 0 0 912 0The following is partial sample output from the show controllers sonet command using an STM-1 card in the Cisco AS5850.
Router# show controllers sonet 3/0SONET 3/0 is down.Applique type is Channelized Sonet/SDHClock Source is Internal, AUG mapping is AU4.Medium info:Type: SDH, Line Coding: NRZ, Line Type: Short SMRegenerator Section Status:LOSMultiplex Section Status:Higher Order Path Status:Path# 1 has no defectsLower Order Path Status:VC-12 1/1/1/1 has no defectsVC-12 1/1/1/2 has no defectsVC-12 1/1/1/3 has no defectsVC-12 1/1/2/1 has no defectsVC-12 1/1/2/2 has no defectsVC-12 1/1/2/3 has no defectsVC-12 1/1/3/1 has no defectsVC-12 1/1/3/2 has no defectsVC-12 1/1/3/3 has no defectsVC-12 1/1/4/1 has no defectsVC-12 1/1/4/2 has no defectsVC-12 1/1/4/3 has no defectsVC-12 1/1/5/1 has no defectsVC-12 1/1/5/2 has no defectsVC-12 1/1/5/3 has no defectsVC-12 1/1/6/1 has no defectsVC-12 1/1/6/2 has no defects...VC-12 1/3/5/3 has no defectsVC-12 1/3/6/1 has no defectsVC-12 1/3/6/2 has no defectsVC-12 1/3/6/3 has no defectsVC-12 1/3/7/1 has no defectsVC-12 1/3/7/2 has no defectsVC-12 1/3/7/3 has no defectsData in current interval (20 seconds elapsed):Regenerator Section:0 CVs, 20 ESs, 20 SESs, 0 SEFSsMultiplex Section:0 CVs, 0 ESs, 0 SESs, 0 UASsHigher Order Path:Path# 1: 0 CVs, 0 ESs, 0 SESs, 20 UASsLower Order Path:VC-12 1/1/1/1: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/1/1/2: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/1/1/3: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/1/2/1: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/1/2/2: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/1/2/3: 0 CVs, 0 ESs, 0 SESs, 20 UASs...VC-12 1/3/5/3: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/3/6/1: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/3/6/2: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/3/6/3: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/3/7/1: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/3/7/2: 0 CVs, 0 ESs, 0 SESs, 20 UASsVC-12 1/3/7/3: 0 CVs, 0 ESs, 0 SESs, 20 UASsTable 3 describes the significant fields shown in the display.
The following is partial output from the show controllers sonet command using an STM-1 card in the Cisco AS5850 with SONET APS configured.
Router# show controllers sonet 1/0SONET 1/0 is up.Applique type is Channelized Sonet/SDHClock Source is Line, AUG mapping is AU4.MSP 1+1 bi-directional enabledProtection fiber (Port 0), No Alarm, traffic in-useWorking fiber (Port 1), No Alarm, traffic not in-useLocal request: No RequestRemote request: No RequestMedium info:Type: SDH, Line Coding: NRZ, Line Type: Short SMRegenerator Section Status:No alarms detected.Multiplex Section Status:No alarms detected.No BER failure/degrade detectedB2 BER_SF threshold power : 3B2 BER_SD threshold power : 6Higher Order Path Status:Path# 1 has no defectsLower Order Path Status:VC-12 1/1/1/1 has no defectsVC-12 1/1/1/2 has no defectsVC-12 1/1/1/3 has no defects...Table 4 describes the significant fields shown in the display that are different from the fields described in Table 3.
Related Commands
Command Descriptionaps protect (SONET)
Enables SONET APS.
show version
Displays information about the hardware and software on a router.
Copyright © 2004 Cisco Systems, Inc. All rights reserved.