Component Leds; Troubleshooting Using The T640 Chassis And Interface Alarm Messages - Juniper T640 Hardware Manual

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Troubleshooting Using the T640 Chassis and Interface Alarm Messages

Copyright © 2010, Juniper Networks, Inc.
The following LEDs are located on various router components and display the status of
those components:
Control board LEDs—Three LEDs on each control board faceplate indicate the status
of that T-CB or LCC-CB. If no LEDs are lit, the control board is not receiving power.
See
PIC LEDs—Each port on each PIC has an LED that indicates the status of the port. For
more information, see the T640 Core Router PIC Guide.
SIB LEDs—Three LEDs on each SIB faceplate—
status of that SIB.
SCG LEDs—Three LEDs on each SCG faceplate indicate the status of that SCG.
Power supply LEDs—LEDs on each power supply faceplate indicates the status of that
power supply.
T640 Chassis Description on page 13
Locating the T640 Craft Interface Serial Number Label on page 372
Replacing a T640 Craft Interface on page 196
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
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 30 on page 166.
Interface alarms—Indicate a problem with a specific network interface, as described
in Table 31 on page 167.
In both Table 30 on page 166 and Table 31 on page 167, 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
Chapter 16: Troubleshooting T640 Router Hardware Components
,
ACTIVE OK
show chassis alarms
command.
, and —indicate the
FAIL
CLI command:
165