Troubleshooting The T320 Sonet Clock Generators - Juniper Core Router T Series Hardware Manual

T320 Core Router Hardware Guide
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Troubleshooting the T320 SONET Clock Generators

Problem
Solution
296
T320 Craft Interface Description on page 20
T320 Craft Interface Alarm LEDs and ACO/LT Button on page 21
Overview of Troubleshooting Resources for the T320 Router on page 291
T320 Alarm Messages Overview on page 293
Contacting Customer Support on page 309
Description:
During normal operations:
The green LED on the SCG faceplate is lit.
OK
The yellow FAIL LED on the SCG faceplate is not lit.
The blue LED on the SCG faceplate indicates which SCG is the master.
MASTER
The following alarms and LEDs indicate a problem with an SCG:
The yellow LED on the SCG faceplate is lit.
FAIL
The green LED on the SCG faceplate is not lit.
OK
A red alarm indicates that an SCG, SCG voltage sensor, or the internal clock has failed.
A red alarm indicates that there are no SCGs online.
A yellow alarm indicates that an SCG is not online in a router with redundant SCGs or
that an SCG has been removed..
A yellow alarm indicates that a temperature sensor has failed.
To troubleshoot the T320 SCGs:
Check the LEDs on the faceplate of each SCG and on the craft interface.
1.
Use the CLI to check for alarms—Issue the
2.
alarms..
In Table 67 on page 297, the text in the column labeled "LCD Message" appears in the
display of the craft interface. The text in the column labeled "CLI Message" appears in
the output from the show chassis alarms
command to view the
show chassis alarms
command.
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