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Troubleshooting the T320 Host Subsystem

 

Problem:

Description:

During normal operations:

  • The green host subsystem OK LED on the craft interface is lit.

  • The red host subsystem FAIL LED on the craft interface is not lit.

The following alarms and LEDs indicate a problem with a host subsystem control board or Routing Engine:

  • The red host subsystem FAIL LED on the craft interface is lit.

  • The green host subsystem OK LED on the craft interface is not lit.

  • A red alarm indicates that the host subsystem has been removed.

  • A yellow alarm indicates that the host subsystem has failed.

Solution

To troubleshoot the T640 host subsystems:

  1. Check the LEDs on the faceplate of each control board and Routing engine.
  2. Check the LEDs on the craft interface.
  3. Use the CLI to check for alarms—Issue the show chassis alarms command to view the alarms.

In Table 1, 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.

Table 1: T320 Host Subsystem Alarm Messages

Alarm Type

LCD Display Message

CLI Message

Red

Host host-number Removed

Host host-number Removed

Yellow

Host host-number Failure

Host host-number Failure