Analyzing The Logs; Troubleshooting Module Issues - Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual

Chapter 4 Troubleshooting Hardware
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
•
In addition, the module monitors itself and generates an exception if it detects an anomalous condition.
If the exception is a FATAL error, the module is power cycled. Use the following CLI commands to view
the conditions leading up to the problem:
•
•
•
•
•

Analyzing The Logs

In some instances, you may need to check other internal logs to verify the cause of a problem. You can
use the state transition log and the error log in these instances. These logs may hold information not
present in the system messages or in the exception log because of interactions between the module and
the supervisor. The state transition log is sorted in ascending manner (that is, the latest state is at the end
of the log). The error log is sorted in descending manner (that is, the latest error is at the beginning of
the log).
Use the show module internal event-history module CLI command to view the state transition log for
a module. Use the show module internal event-history errors CLI command to view the error log.
The state transition log indicates the current state of a given module. (See
of the transition log contains the following information:
•
•
•
•
•
Example 4-16 State Transition Log
7) FSM:<ID(2): Slot 8, node 0x0800> Transition at 14258 usecs after Mon Sep 26 17:50:56
2005
Based on the above state transition you can infer that when the module was in the powered-up state, PFM
triggered an event to power down the module. This trigger caused the state machine to go to the not
present state.

Troubleshooting Module Issues

To isolate a module problem, follow these steps:
Verify that all Status LEDs are green. If any status LED is red or off, the module might have shifted out
Step 1
of its slot.
OL-9285-05
Online health management (OHMS)—Sent from the supervisor to all the ports in the module to
verify that traffic is flowing properly.
show logging
show module diag
show module internal exception-log module
show module internal event-history module
show hardware internal errors
Timestamp
Node that triggered the state transition
Module state prior to transition
Event that occurred
Current state of module
Previous state: [LCM_ST_LC_POWERED_UP]
Triggered event: [LCM_EV_PFM_LC_STATUS_POWERED_DOWN]
Next state: [LCM_ST_LC_NOT_PRESENT]
Troubleshooting Switching and Services Modules
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
Example 4-16.) Each element
4-25