Working With Unrecoverable System Restarts - Cisco MDS 9000 Series Troubleshooting Manual

Troubleshooting System Restarts
S e n d 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 .
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Step 8 To determine the cause and resolution for the restart condition, call Cisco TAC and ask them to review
your core dump.

Working with Unrecoverable System Restarts

An unrecoverable system restart may occur in the following cases:
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The effect of a process restart is determined by the policy configured for each process. Unrecoverable
restarts may cause loss of functionality, restart of the active supervisor, a supervisor switchover, or
restart of the switch.
To respond to an unrecoverable restart, perform the steps listed in the
Restarts" section on page
Cisco MDS 9000 Family Troubleshooting Guide
2-6
The maximum number of times a process can be restarted is part of the HA policy for any process
(this parameter is not configurable). If the process restarts more than the maximum number of times,
the older core files are overwritten.
The maximum number of core files that can be saved for any process is part of the HA policy for
any process (this parameter is not configurable, and it is set to 3).
A critical process fails and is not restartable
A process restarts more times than is allowed by the system configuration
A process restarts more frequently than is allowed by the system configuration
2-2.
Chapter 2 Troubleshooting Switch System Issues
"Working with Recoverable
OL-5183-02, Cisco MDS SAN-OS Release 1.3