Step 2: Check the Redundant Control Board Status from the Craft Interface

Action

If you are near the router, physically look at the craft interface for the Control Board LEDs. To display redundant Control Board status from the craft interface, use the following CLI command:

user@host> show chassis craft-interface

Sample Output

t640@host> show chassis craft-interface

FPM Display contents:

[...Output truncated...}

CB LEDs:

   CB   0   1

--------------

Amber  .

Green  *

Blue   *

[...Output truncated...]

What It Means

The CB LEDs section of the command output indicates the status of the redundant Control Board. An asterisk (*) indicates the current operating state: Amber (offline), Green (online), and Blue (Master). In the above output, no redundant Control Board is installed—the output under CB1 is blank.