Optics and Hardware Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

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Optics and Hardware Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

View coherent optical transceiver module parameters

Updated: June 16, 2026

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Provides instructions on how to view coherent optical transceiver module parameters in a controlled workflow. Covers prerequisites, execution steps, and result checks needed for successful completion.

The display of the show controller optics command is now improved to include information about the module state and datapath state of the optical transceivers. You can view these details using the information all and information counters keywords of the show controller optics command.

Table 1. Feature History Table

Feature Name

Release Information

Description

View Coherent Optical Transceiver Module Parameters

Release 25.4.1

Introduced in this release on: Fixed Systems (8010 [ASIC: A100])(select variants only*)

*This feature is supported on:

  • 8011-32Y8L2H2FH

  • 8011-12G12X4Y-A/D

View Coherent Optical Transceiver Module Parameters

Release 25.4.1

Introduced in this release on: Fixed Systems (8700 [ASIC: K100], 8010 [ASIC: A100])(select variants only*)

*This feature is supported on:

  • 8712-MOD-M

  • 8011-4G24Y4H-I

View Coherent Optical Transceiver Module Parameters

Release 24.4.1

Introduced in this release on: Fixed Systems (8200 [ASIC: P100], 8700 [ASIC: P100])(select variants only*); Modular Systems (8800 [LC ASIC: P100])(select variants only*)

*This feature is now supported on:

  • 8212-48FH-M

  • 8711-32FH-M

  • 88-LC1-12TH24FH-E

  • 88-LC1-36EH

  • 88-LC1-52Y8H-EM

View Coherent Optical Transceiver Module Parameters

Release 24.1.1

You can now monitor the overall functioning and status of the coherent optical transceiver. This is possible because you can now view the module state and data path state of the optical transceivers, which provide insight into the current state of the optical transceiver.

This feature modifies the output of the show controller optics command.

Module State Machine (MSM) defines host-module interactions and behavioral characteristics of the optical module, such as the initialization of the management interface and the module power mode. The Module State field provides the current status of the optical transceiver. The optical transceiver can be in any one of the states:

  • Low power

  • Power up

  • Ready

  • Power down

  • Fault

Data Path State Machine (DPSM) defines the host-module interactions and behavioral characteristics needed for the initialization of one particular data path, which represents the signal flow and signal processing of any one instance of one type of application.

The Datapath State field provides the current state of the data path on each host lane. It represents the initialization status of the resources associated with a data path in response to host configuration settings or commands.

By default, the data paths begin initializing when the module state is ready. The data path state is dependent on the module state. The host uses the activated data path to carry traffic.

Note

For additional information on the module state and datapath state, see the Common Management Interface Specification.

Procedure

1.

Verify coherent optical transceiver module parameters.

The show controllers optics r/s/i/p information counters command displays the parameters of the optical transceiver present in the 0/0/0/8 location ID. The 0/0/0/8 location ID represents rack/slot/instance/port. Network administrators can use the displayed values of this command for monitoring and troubleshooting. This example displays the details when the optical transceiver operates in the transponder mode.

Example:

Router#show controllers optics 0/0/0/8 information counters 
Fri Feb 16 11:06:31.415 UTC

Module State : Ready

Datapath State [Client-0]: TX Turn On

Acquisition Counter:    INVALID

HOST SIDE ALARM COUNTERS
======================================
Host-Intf-0-FDD-Alarm-Counter[0]                  Host-Intf-0-FED-Alarm-Counter[0]


HOST SIDE FEC-BER FEC-FERC CURRENT VALUES
======================================
Host-Intf-0-FEC-BER[0.00E+00]                   Host-Intf-0-FEC-FERC[0.00E+00]


 Supported Loopback Types :
============================
 [1.] Media Internal
 [2.] Media Line
 [3.] Host Line
 [4.] Host Internal
 [5.] Host Per Lane 
 [6.] Media Per Lane
 [7.] Simultaneous Media Host
          
 Unsupported Loopback Types :
=============================
          
 Media Configured Loopback : Media Loopback None 
 Media Applied Loopback    : Media Loopback None 
          
          
 Host Configured Loopback : Host Loopback None 
 Host Applied Loopback    : Host Loopback None 
          
          
          
FW Upgrade Capability Mode:
========================== 
 Supports Both Warm & Cold boot
 Supports Cold boot only
2.

This example displays the details when the optical transceiver operates in the muxponder mode.

Example:

Router#show controllers optics 0/0/0/29 information all 
Fri Feb 16 11:06:31.415 UTC

Module State : Ready

Datapath State [Client-0]: Activated

Datapath State [Client-1]: Activated

Datapath State [Client-2]: Activated

Datapath State [Client-3]: Activated

Acquisition Counter:    INVALID

HOST SIDE ALARM COUNTERS
======================================
Host-Intf-0-FDD-Alarm-Counter[0]                  Host-Intf-0-FED-Alarm-Counter[0]
Host-Intf-1-FDD-Alarm-Counter[0]                  Host-Intf-0-FED-Alarm-Counter[0]
Host-Intf-2-FDD-Alarm-Counter[0]                  Host-Intf-0-FED-Alarm-Counter[0]
Host-Intf-3-FDD-Alarm-Counter[0]                  Host-Intf-0-FED-Alarm-Counter[0]


HOST SIDE FEC-BER FEC-FERC CURRENT VALUES
======================================
Host-Intf-0-FEC-BER[0.00E+00]                   Host-Intf-0-FEC-FERC[0.00E+00]
Host-Intf-1-FEC-BER[0.00E+00]                   Host-Intf-1-FEC-FERC[0.00E+00]
Host-Intf-2-FEC-BER[0.00E+00]                   Host-Intf-2-FEC-FERC[0.00E+00]
Host-Intf-3-FEC-BER[0.00E+00]                   Host-Intf-3-FEC-FERC[0.00E+00] 

Supported Loopback Types :
============================
 [1.] Media Internal
 [2.] Media Line
 [3.] Host Line
 [4.] Host Internal
 [5.] Host Per Lane 
 [6.] Media Per Lane
 [7.] Simultaneous Media Host

This example displays the details when the optical transceiver operates in the muxponder mode.

Verify that the system reflects the intended configuration state.

What to do next

Continue with related procedures as required by your workflow.