T4000 Alarm Messages Overview; Chassis Alarms - Juniper T4000 Hardware Manual

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T4000 Alarm Messages Overview

Chassis Alarms

Copyright © 2018, Juniper Networks, Inc.
Power Supply LEDs
See "T4000 Six-Input DC Power Supply LEDs" on page
SIB LEDs
See "T4000 SIB LEDs" on page
SCG LEDs
See "T4000 SONET Clock Generators (SCGs) LEDs" on page
T4000 Hardware Component Overview on page 5
T4000 Troubleshooting Resources Overview on page 345
T4000 Alarm Messages Overview on page 347
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,
and reports the cause of the alarm in the craft interface LCD.
To view a more detailed description of the alarm cause, issue the
CLI command:
user@host> show chassis alarms
1 alarms currently active
Alarm time
2011-12-08 21:05:15 PST
There are two classes of alarm messages:
Chassis Alarms on page 347
Interface Alarms on page 348
Chassis alarms Indicate a problem with a chassis component such as the cooling system
or power supplies. For more information about chassis alarms for each component, see
the following topics:
Troubleshooting the T4000 Cooling System on page 351
Troubleshooting the T4000 Craft Interface on page 349
Troubleshooting the T4000 Control Boards on page 356
Troubleshooting the T4000 FPCs on page 358
Troubleshooting the T4000 Host Subsystems on page 354
Troubleshooting the T4000 PICs on page 363
Troubleshooting the T4000 Power System on page 363
Chapter 36: Troubleshooting Components
81.
Class Description
Minor PEM 1 Absent
77.
22.
show chassis alarms
347