CHAPTER 11
Monitoring the Cooling System
•
Checklist for Monitoring the Cooling System on page 317
•
Understanding the Cooling System on page 318
•
Checking the Cooling System Status on page 339
•
Checking the Cooling System Alarms on page 345
•
Maintaining the Air Filter on page 349
•
Verifying a Fan Failure on page 349
•
Verifying an Impeller Failure on page 349
•
Replacing a Cooling System Component on page 350
Checklist for Monitoring the Cooling System
Purpose You monitor and maintain the cooling system to keep an acceptable operating
temperature for the router chassis and its components. (See Table 88 on page 317.)
Action Table 88: Checklist for Monitoring the Cooling System
Command or ActionMonitor Cooling System Tasks
show chassis environment
“Checking the Cooling System Status” on
page 339
“Checking the Cooling System Alarms” on page 345
show chassis craft-interface
Check the router craft interface.
1. Check the Alarm Indicators on the Craft
Interface on page 345
show chassis alarms2. Display Current Cooling System Alarms
on page 346
show log messages | match fan3. Display Cooling System Error Messages in
the System Log File on page 348
Inspect the air filter. If dirty, clean it; if
damaged, replace it.
“Maintaining the Air Filter” on page 349
Perform a swap test on the fan. If defective,
replace it without powering down the router.
“Verifying a Fan Failure” on page 349
317Copyright © 2012, Juniper Networks, Inc.
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