Performing Serdes Loopbacks; Interpreting The Current Status - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Online System Health Management
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
If the test fails to complete successfully, the software analyzes the failure and prints the following error:
Note
External loopback test on interface fc 7/2 failed. Failure reason: Failed to loopback,
analysis complete Failed device ID 3 on module 1

Performing Serdes Loopbacks

Serializer/Deserializer (serdes) loopback tests the hardware for a port. These tests are available for Fibre
Channel interfaces.
Use the EXEC-level system health serdes-loopback command to explicitly run this test on demand
(when requested by the user) within ports for the entire module.
switch# system health serdes-loopback interface fc 3/1
This will shut the requested interfaces Do you want to continue (y/n)?
Serdes loopback test passed for module 3 port 1
Use the EXEC-level system health serdes-loopback command to explicitly run this test on demand
(when requested by the user) within ports for the entire module and override the frame count configured
on the switch.
switch# system health serdes-loopback interface fc 3/1 frame-count 10
This will shut the requested interfaces Do you want to continue (y/n)?
Serdes loopback test passed for module 3 port 1
Use the EXEC-level system health serdes-loopback command to explicitly run this test on demand
(when requested by the user) within ports for the entire module and override the frame length configured
on the switch.
switch# system health serdes-loopback interface fc 3/1 frame-length 32
This will shut the requested interfaces Do you want to continue (y/n)?
Serdes loopback test passed for module 3 port 1
Note If the test fails to complete successfully, the software analyzes the failure and prints the following error:
External loopback test on interface fc 3/1 failed. Failure reason: Failed to loopback,
analysis complete Failed device ID 3 on module 3

Interpreting the Current Status

The status of each module or test depends on the current configured state of the OHMS test in that
particular module (see
Table 59-1
Status
Enabled
Disabled
Running
Failing
Cisco MDS 9000 Family CLI Configuration Guide
59-16
Table 59-1).
OHMS Configured Status for Tests and Modules
Description
You have currently enabled the test in this module and the test is not running.
You have currently disabled the test in this module.
You have enabled the test and the test is currently running in this module.
This state is displayed if a failure is imminent for the test running in this
module—possibility of test recovery exists in this state.
Chapter 59 Monitoring System Processes and Logs
[n] y
[n] y
[n] y
OL-18084-01, Cisco MDS NX-OS Release 4.x