Internet Router Hardware Guide

Troubleshooting Hardware Components
LEDs on Hardware Components
LEDs on the faceplates of the following hardware components report their status:
DC power supply—A green LED labeled CB ON, a blue one labeled OUTPUT OK,
and an amber one labeled
CB OFF. The original power supply also has an amber
LED labeled
NO AIRFLOW. For more information, see “Power Supply” on page 36.
MCS—A blue LED labeled MASTER, a green one labeled OK, and an amber one
labeled
FAIL. For more information, see “MCS Components” on page 26.
PCG—A blue LED labeled MASTER, a green one labeled OK, and an amber one
labeled
FAIL. For more information, see “PCG Components” on page 19.
PIC—Most PICs have an LED labeled STATUS on the PIC faceplate. Some PICs
have additional LEDs, often one per port. The meaning of the LED states differs
for various PICs. For more information, see the M160 Internet Router PIC Guide.
SFM—A green LED labeled OK and a red one labeled FAIL.Formore
information, see “SFM Components” on page 20.
Chassis and Interface Alarm M essages
When the Routing Engine detects an alarm condition, it lights the red or
yellow alarm LED on the craft interface as appropriate, trips the corresponding
alarm relay contact on the CIP, and reports the cause of the alarm in the
craft interface LCD. To view a more detailed description of the alarm
cause, issue the
show chassis alarms CLI command:
user@host> show chassis alarms
There are two classes of alarm messages:
Chassis alarms—Indicate a problem with a chassis component such as the
cooling system or power supplies, as described in Table 26.
Interface alarms—Indicate a problem with a specific network interface, as
described in Table 27.
In both Table 26 and Table 27, the text in the column labeled “LCD Message”
appears in the LCD. The text in the column labeled “CLI Message” appears
in the output from the
show chassis alarms command.
Table 26: Chassis Alarm Messages
Componen
t
LCD Messa
ge
CLI Messa
ge
Fan Failure RED ALARM - fan name Failure
F an Removed YELLO W ALARM - fan name Removed
Fans and
impe lle rs
Fans Missing RED ALARM - Too many fans missing or failing
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