• Supported Platforms
• M40e Routers

• Related Topics
• Replacing an SFM in an M40e Router
• M40e Switching and Forwarding Module (SFM) Description
• Installing an SFM in an M40e Router

Maintaining M40e SFMs

Purpose

For optimal performance, verify the condition of the SFMs.

Action

The router can have a Switching and Forwarding Module (SFM) in each of the slots labeled SFM 0 and SFM 1 at the rear of the chassis, as shown in M40e Chassis Description. To maintain the SFMs, regularly:

• Check the LEDs on the SFM faceplates. The green LED labeled OK lights steadily on the active SFM when it is functioning normally. No LEDs are lit on the standby SFM. For more information, see M40e SFM LEDs.
• Issue the CLI show chassis sfm command to check the status of the SFMs. As shown in the sample output, when two SFMs are installed the active SFM is marked as Online, and the standby SFM as Online - Standby:
  
  

  user@host> show chassis sfm

                       Temp  CPU Utilization (%) Memory    Utilization (%)
  Slot State           (C)  Total  Interrupt    DRAM (MB) Heap     Buffer
    0  Online           39      3          0      64        16         46
    1  Online - Standby 42      4          0      64        16         46
  

  For more detailed output, add the detail option. The following example also specifies a slot number (1), which is optional:

  
  

  user@host> show chassis sfm detail 1

   Slot 1 information:
    State                     Online - Standby
    SPP Temperature        42 degrees C / 107 degrees F
    SPR Temperature        42 degrees C / 107 degrees F
    Total CPU DRAM         64 MB
    Total SSRAM             8 MB
    Internet Processor II     Version 1, Foundry IBM, Part number 9

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