Juniper M Series Monitoring And Troubleshooting Manual page 706

M Series and T Series Routers Monitoring and Troubleshooting Guide
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Documentation
Display Redundant SCG Mastership
Display the SCG Master and Standby from the Craft Interface Output
Purpose
Action
Sample Output
Meaning
662
Table 148: SCG LEDs
Label Color
Green
OK
FAIL Amber
MASTER Blue
Checklist for Monitoring the Redundant SCG on page 657
If both SCGs are installed and functioning normally,
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 and which is operating as the standby:
Display the SCG Master and Standby from the Craft Interface Output on page 662
1.
View the SCG LEDs on page 663
2.
To determine the SCG master and standby from the craft interface output.
To determine the SCG master and SCG standby from the craft interface status
information, use the following command:
user@host> show chassis craft-interface
user@host> show chassis craft-interface
[...Output truncated...]
SCG LEDs:
SCG 0 1
--------------
Amber . .
Green * *
Blue * .
[...Output truncated...]
The command output displays which SCG is operating as master. Asterisks (*) indicate
the operation status. The color represents the possible SCG operating states:
(Fail), (OK), and
Green Blue
in slot 1 is the backup.
State Description
On steadily SCG is online and is functioning
normally.
On steadily SCG has failed.
On steadily SCG is functioning as master.
SCG0
(Master). The SCG in slot 0 is operating as master; the SCG
is master and is backup.
SCG1
Amber
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