JUNOS Internet Software Network Operations Guide: Hardware
120 ! Checking Router Alarms
Steps To Take To check router system alarms, follow these steps:
1. Display Current Component Alarms on page 120
2. Display Component Error Messages in the System Log File on page 121
Step 1: Display Current Component Alarms
Action To display the active chassis alarms, use the following CLI command:
user@host> show chassis alarms
Sample Output
user@host>
show chassis alarms
5 alarms are currently active
Alarm time Class Description
2002-04-16 15:09:01 PDT Major PIC 2/2 failed to initialize
2002-04-16 15:08:40 PDT Major Power Supply A 2.5 volt output failed
2002-04-16 15:08:40 PDT Major Power Supply A 5 volt output failed
2002-04-16 15:08:40 PDT Major Power Supply A 3.3 volt output failed
2002-04-16 15:08:40 PDT Major Power Supply A fan failed
What It Means The command output displays the number of alarms currently active, the time at
which the alarm began, the severity level, and an alarm description. Note the date
and time of an alarm so that you can correlate it with error messages in the
messages system log file. This sample command output is for a router from which
the lower fan tray and the power supply have been removed, and the management
Ethernet interface disconnected. The craft interface display, in alarm mode, displays
a short description of the alarm. The
show chassis alarms command output displays
a longer description of the alarm.
Alternative Actions To view active router alarms, you can physically look at the craft interface or use the
show chassis craft-interface command.
The
show chassis craft-interface command displays the most severe alarm first, the
alarm indicator status, and the number of active alarms. You cannot scroll through
the alarms (if there are more than two) at the command line.
user@host>
show chassis craft-interface
Red alarm: LED on, relay on
Yellow alarm: LED off, relay off
Host OK LED: On
Host fail LED: Off
FPCs 0 1 2 3
-------------------
Green * * * *
Red . . . .
LCD screen:
+--------------------+
|myrouter |
|5 Alarms active |
|R: PIC 2/2 FAILED |
|R: Supply A 2v FAIL |
+--------------------+
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