CHAPTER 8 Troubleshooting
Table
ONLINE LED | REDUNDANT LED | State of the Line Module |
Off | Off | Module is booting or is an inactive primary line |
|
| module. |
On | Off | Module is active, but no standby module is |
|
| available. |
Off | On | Module is in standby state. |
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|
|
On | On | Module is active, and a standby module is |
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| available. |
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|
Monitoring Temperatures of Modules
You can view the temperature of each module by issuing the show environment all and show environment table commands. In addition, the system generates detailed log messages if the temperature of a module is outside normal operating limits.
If the temperature of any module exceeds the upper temperature limit, the system immediately goes into thermal protection mode. Once the system has entered thermal protection mode, you must resolve the cause of the high temperature.
Table
Cause of High Operating |
|
|
Temperature | Symptoms | Resolution |
Air vents to system are blocked | Space around system does not meet | Increase space around system. |
| specifications (see Appendix A, |
|
| System Specifications). |
|
Ambient temperature exceeds | Ambient temperature exceeds | Provide extra cooling or heating in |
specifications | specifications (see Appendix A, | the room where the system is |
| System Specifications). | located. |
|
|
|
Cooling fan failure | • | FAN OK LED on SRP module is |
|
| not illuminated. |
| • | FAN FAIL LED on SRP module is |
|
| illuminated. |
Replace fan tray (see Chapter 7, Maintaining the ERX System).
Module failure | FAIL LED on module is illuminated. | Replace module (see Chapter 3, |
|
| Installing ERX Modules). |
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|
|
When you have resolved the cause of the high temperature, you must power cycle the system to reset the modules.
