Cisco MDS-9124 Troubleshooting Guide - Page 108

Troubleshooting Clock Module Issues Chapter 4 Troubleshooting Hardware Send documentation comments to [email protected] If Cisco SAN-OS detects a major temperature threshold violation on a redundant supervisor intake sensor, it immediately shuts down the redundant supervisor. This will result in either a switchover or in the standby supervisor module shutting down, depending which supervisor module violated the threshold. If Cisco SAN-OS detects a major temperature threshold violation on an intake sensor on the only operational supervisor in a switch, a 120 second countdown starts. If the temperature recovers, the countdown is discarded. Otherwise, the switch power supplies are shutdown. The following syslog messages are printed every five seconds during the countdown Error Message PLATFORM-0-SYS_RESET: [chars] System shutdown in [dec] seconds. Explanation System shutdown in the number of seconds shown in the error message. Recommended Action Enter show environment temperature CLI command or similar Fabric Manager/Device Manager command to collect more information. Sometimes, a temperature sensors fails. No explicit action is taken for this condition except generating the following system message: Error Message PLATFORM-5-MOD_TEMPFAIL: Module [dec] temperature sensor failed. Explanation Module contains a faulty temperature sensor. Recommended Action Enter the show environment temperature CLI command or similar Fabric Manager/Device Manager command to collect more information. Troubleshooting Clock Module Issues A Cisco MDS 9500 Series director has two clock modules: A and B. Use the show environment clock CLI command to view the clock module status. (See Example 4-4.) Example 4-4 Output of show environment clock Command switch# show environment clock Clock Model Hw Status A DS-C9500-CL 0.0 ok/active B DS-C9500-CL 0.0 ok/standby On a clock module failure, the system switches over to the redundant clock module automatically. This also results in a hardware reset of the switch. When the switch reboots, it displays the current active clock module. The following syslog message is printed at switch boot-up time, indicating the current active clock module: Error Message PLATFORM-0-CHASSIS_CLKSWRESET: Switch reset due to clock switch. Explanation Chassis clock source has failed and system will be reset. System will automatically start using the redundant clock module. Recommended Action Replace the failed clock module during the next maintenance window. 4-12 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x OL-9285-05