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Maintaining the MX2020 Host Subsystem

 

Maintaining the MX2020 Routing Engines

Purpose

Each host subsystem comprises a Control Board and Routing Engine (CB-RE) functioning together.

To maintain the host subsystem, check the LEDs (RE0 and RE1) on the craft interface. For more information about the LEDs and the display, see MX2020 Craft Interface Description.

Note

Even though the Routing Engine is combined with a Control Board (CB-RE), separate LEDs on the craft interface show the status of the routing engines, and separate LEDs show the status of the Control Board.

For optimum router performance, verify the condition of the Routing Engines and the CB-REs.

Action

On a regular basis:

  • Check the host subsystem LEDs on the craft interface. For more information about the LEDs, and the display, see MX2020 Craft Interface Description. During normal operations:

    Note

    Even though the Routing Engine is combined with a Control Board (CB-RE), separate LEDs on the craft interface show the status of the routing engines, and separate LEDs show the status of the Control Board.

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

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

  • Check the LEDs on the Routing Engine portion of the CB-RE faceplate. During normal operations, the ONLINE LED is lit steadily green.

  • Issue the show chassis routing-engine command to check the status of the Routing Engines. The output is similar to the following:

user@host> show chassis routing-engine

For further description of the output from the command, see the Junos OS System Basics and Services Command Reference  .

Maintaining the MX2020 Control Boards

Purpose

For optimum router performance, verify the condition of the Control Board and Routing Engine (CB-RE).

Action

On a regular basis:

  • Check the host subsystem LEDs on the craft interface. For more information about the LEDs and the display, see MX2000 Switch Fabric Board LED.

    During normal operations:

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

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

  • Check the LEDs on the control board portion of the CB-RE faceplate.

    During normal operations:

    • The green OK LED on the CB-RE faceplate is lit.

    • The red FAIL LED on the CB-RE faceplate is not lit.

  • Issue the show chassis environment cb command to check the status of the CB-REs. The output is similar to the following:

    user@host> show chassis environment cb

For further description of the output from the command, see the Junos OS System Basics and Services Command Reference  .