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Troubleshooting the MX2020 Host Subsystems



The following alarms and LEDs indicate a problem with a host subsystem Control Board and Routing Engine (CB-RE):

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

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

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


To troubleshooting the host subsystems:

  1. Check the LEDs on the faceplate of each CB-RE.

  2. Check the LEDs on the craft interface.

  3. Use the CLI to check the alarms.

    • Standalone MX2020 router—Issue the show chassis alarms command to view the alarms.