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Redundancy Status
You can determine the redundancy state of line modules by examining the ONLINE
and REDUNDANT status LEDs (ERX7xx and ERX14xx models only). See Table 13
on page 103.
NOTE: The REDUNDANT LED on the cOCx/STMx, FE-8, GE/FE, HSSI, and OCx/STMx
modules is nonfunctional.
Table 13: Redundancy Status of a Line Module
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.
For example, if the temperature of any forwarding controller exceeds 212°F (100°C),
a message appears on the console and the event is added to the system log. If you
receive this message, report it to your customer service representative.
If the temperature of any module exceeds the upper temperature limit, the system
immediately goes into thermal protection mode. After the system has entered thermal
protection mode, you must resolve the cause of the high temperature quickly.
Table 14: Troubleshooting High-Temperature Conditions
Cause of High Operating
Temperature
Air vents to system are blocked
Ambient temperature exceeds
specifications
ONLINE LED
REDUNDANT LED
Off
Off
On
Off
Off
On
On
On
Symptoms
Space around system does not meet
specifications. (See "System Specifications" on
page 109.)
Ambient temperature exceeds specifications.
(See "System Specifications" on page 109.)
State of the Line Module
Module is booting or is an inactive primary line module.
Module is active, but no standby module is available.
Module is in standby state.
Module is active, and a standby module is available.
Resolution
Increase space around system.
Provide extra cooling or heating in the
room where the system is located.
Monitoring Temperatures of Modules
Chapter 9: Troubleshooting
103
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Table of Contents
Troubleshooting
