Table 106: SCG LEDs (continued)
DescriptionStateColorLabel
SCG has failed.On steadilyAmberFAIL
SCG is functioning as master.On steadilyBlueMASTER
Related
Documentation
Checklist for Monitoring the SCG on page 401•
Determine SCG Mastership
If both SCGs are installed and functioning normally, SCG0 is master and SCG1 is backup.
Removing the backup SCG does not affect the functioning of the router. Taking the master
SCG offline might result in a brief loss of SONET clock lock while the backup SCG becomes
master.
To determine which SCG is operating as the master:
1.
Display the SCG Master from the Craft Interface Output on page 406
2.
Check the SCG LED States for SCG Mastership on the Faceplate on page 406
Display the SCG Master from the Craft Interface Output
Purpose To determine the SCG master from the craft interface output.
Action To determine the SCG master from the craft interface status information, use the following
command:
user@host> show chassis craft-interface
Sample Output
user@host> show chassis craft-interface
[...Output truncated...]
SCG LEDs:
SCG 0 1
--------------
Amber . .
Green * *
Blue * .
[...Output truncated...]
Meaning The command output displays the status of SCGs. Asterisks (*) indicate the operation
status. The color represents the possible SCG operating states: Amber (Fail), Green (OK),
and Blue (Master). The SCG in slot 0 is operating as master; the SCG in slot 1 is the backup.
Check the SCG LED States for SCG Mastership on the Faceplate
Purpose To check the SCG LED states for SCG mastership on the faceplate.
Copyright © 2012, Juniper Networks, Inc.406
M Series and T Series Routers Monitoring and Troubleshooting Guide
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