Cisco MDS 9000 Series Troubleshooting Guide

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Cisco MDS 9000 Family Troubleshooting Guide
OL-5183-02, Cisco MDS SAN-OS Release 1.3
Chapter 2 Troubleshooting Switch System Issues
Troubleshooting System Restarts
• 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).
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:
• 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
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 “Working with Recoverable
Restarts” section on page 2-2.

Cisco MDS 9000 Series Specifications

General

Category	Switch
Operating System	Cisco NX-OS
Ports	Varies by model
Protocols	Fibre Channel (FC), Fibre Channel over IP (FCIP), iSCSI
Redundancy	Redundant supervisors, power supplies, and fans
Management	Cisco Data Center Network Manager (DCNM), CLI, SNMP
Virtualization Support	VSANs (Virtual SANs)
Security Features	Fibre Channel Security Protocol (FC-SP)
Hot Swappable Components	power supplies, fans
Power Supply Options	AC and DC options available