TroubleshootingHardware Components
LEDs on Hardware Components
LEDs on the faceplates of the following hardwarecompon entsreport their status:
DC power supply—A greenLED labeled CB ON, a blue one l abeled OUTPUTOK,
and an amber one labeled CB OFF. The original powersupply 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. Formore 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
haveadditional 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 Messages
When the Routing Engine detects an alarmcondition, it lights the red or
yellow alarm LED on the craftinterface as appropriate, trips the corresponding
alarm relay contact on the CIP, and reports the cause of the alarm in the
craft interface LCD. Toview 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 problemwith a chassis component such as the
cooling system or powersupplies, as described in Table26.
Interface alarms—Indicate a problem with a specific network interface, as
described in Table 27.
In both Table2 6 and Table 27, the text in the column labeled “LCD Message”
appears in the LCD. The text in the columnlabeled “CLI Message” appears
in the output from the show chassis alarms command.
Table 26: Chassis Ala rm Messages
ComponentLCD Message CLI Message
Fan Failure REDALARM - fan name Failure
Fan Removed YELLOW ALARM - fan name Removed
Fans and
impellers
Fans Missing RED ALARM - Too many fans missing or failing
Overview of TroubleshootingResources 209