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    Maintaining the M40e Host Module Components

    Purpose

    Verify the condition of the host module components.

    Action

    The router can have a Routing Engine in each of the slots labeled RE 0 and RE 1 and a Miscellaneous Control Subsystem (MCS) in each of the slots labeled MCS 0 and MCS 1 at the rear of the chassis, as shown in M40e Chassis Description. Each paired Routing Engine and MCS function together as a host module. To maintain the host module, regularly:

    • Check the LCD and the host module LEDs on the craft interface. The LCD reports host module status during normal operation and describes the cause of failures when they occur. The green LEDs labeled ONLINE and MASTER light steadily for the master host module when it is functioning normally. The ONLINE LED also lights for the standby host module if it is installed. For more information about the LEDs and LCD, see M40e Craft Interface Alarm LEDs and Controls and M40e Craft Interface LCD Description.
    • Issue the CLI show chassis routing-engine command to check the status of the Routing Engines. As shown in the sample output, the master Routing Engine is designated Master in the Current state field:

      user@host> show chassis routing-engine
      Routing Engine status:
         Slot 0:
           Current state            Master
           Election priority        Master (default)
           Temperature           37 degrees C / 98 degrees F
           DRAM                 768 MB
           Memory utilization    18 percent
           CPU utilization:
             User                 0 percent
             Background           0 percent
             Kernel               2 percent
             Interrupt            0 percent
             Idle                98 percent
           Model                    RE-2.0
           Serial ID                8b00000792898b01
           Start time               2003-04-29 16:09:49 PDT
           Uptime                   16 days, 3 hours, 6 minutes, 34 seconds
           Load averages:           1 minute   5 minute  15 minute
                                        0.00       0.00       0.00
      Routing Engine status:
         Slot 1:
           Current state            Backup
           Election priority        Backup (default)
           Temperature           36 degrees C / 96 degrees F
           DRAM                 768 MB
           Memory utilization    16 percent
           CPU utilization:
             User                 0 percent
             Background           0 percent
             Kernel               0 percent
             Interrupt            0 percent
             Idle               100 percent
           Model                    RE-2.0
           Serial ID                6d000007c8150801
           Start time               2003-04-22 10:01:29 PDT
           Uptime                   16 days, 3 hours, 6 minutes, 34 seconds
    • Issue the CLI show chassis environment mcs command to check the status of the MCSs. As shown in the sample output, the MCS that belongs to the master host module is designated Master in the State field:

      user@host> show chassis environment mcs
      MCS 0 status:
         State                           Online Master
         Temperature                 48 degrees C / 118 degrees F
         Power:
           3.3 V                   3299 mV
           5.0 V                   4971 mV
           12.0 V                 11770 mV
           5.0 V bias              4989 mV
           8.0 V bias              8246 mV
         BUS Revision                12
         FPGA Revision               13 
      MCS 1 status:
         State                           Online Standby
         Temperature                  51 degrees C / 123 degrees F
         Power:
           3.3V                    3316 mV
           5.0 V                   5001 mV
           12.0 V                 11775 mV
           5.0 V bias              5001 mV
           8.0 V bias              8249 mV
         BUS Revision                12
         FPGA Revision               13 

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


    Published: 2010-10-28