See
T4000 Interface Module Reference
.
•
Power Supply LEDs
See
“T4000 Six-Input DC Power Supply LEDs” on page 45
.
•
SIB LEDs
See
“T4000 SIB LEDs” on page 48
.
•
SCG LEDs
See
“T4000 SONET Clock Generators (SCGs) LEDs” on page 51
.
Related
Documentation
T4000 Hardware Component Overview on page 13
•
•
T4000 Troubleshooting Resources Overview on page 189
•
T4000 Alarm Messages Overview on page 191
T4000 Alarm Messages Overview
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
show chassis alarms
CLI command:
user@host>
show chassis alarms
1 alarms currently active
Alarm time Class Description
2011-12-08 21:05:15 PST Minor PEM 1 Absent
There are two classes of alarm messages:
•
Chassis Alarms on page 191
•
Interface Alarms on page 192
Chassis Alarms
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 193
•
Troubleshooting the T4000 Craft Interface on page 196
•
Troubleshooting the T4000 Control Boards on page 197
•
Troubleshooting the T4000 FPCs on page 200
•
Troubleshooting the T4000 Host Subsystems on page 196
•
Troubleshooting the T4000 PICs on page 208
•
Troubleshooting the T4000 Power System on page 204
191
Copyright © 2013, Juniper Networks, Inc.
Chapter 18: Troubleshooting T4000 Router Hardware Components
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