• Supported Platforms
• M120 Routers

• Related Topics
• M120 Forwarding Engine Boards (FEBs) Description
• Maintaining the M120 FEBs
• Replacing an M120 FEB

Troubleshooting M120 FEBs

Problem

The FEBs are not functioning normally:

Solution

To troubleshoot the FEBs, follow these guidelines:

To troubleshoot the FEBs:

• Check the FEB LEDs on the craft interface.
• Make sure the FEB is properly seated in the midplane. Check that each ejector handle is fully engaged and flush with the FEB bulkhead.
• Issue the CLI show chassis feb command to check the status of each of the installed FEBs. As shown in the sample output, the value Online in the column labeled State indicates that the FEB is functioning normally.
  
  

  user@host> show chassis feb

  Temp  CPU Utilization (%)   Memory    Utilization
  (%)
  Slot State            (C)  Total  Interrupt      DRAM (MB) Heap
  Buffer
    0  Online            66      4          0       512         7
  59
    1  Online            66      4          0       512         7
  59
    2  Online            64      4          0       512         7
  59
    3  Online            67      4          0       512         7
  59
    4  Empty
    5  Offline       
  

  For more detailed output, add the detail option. The following example also specifies a slot number (0), which is optional:

  
  

  user@host> show chassis feb detail 0

  Slot 0 information:
    State                                 Online
    Intake temperature                 66 degrees C / 150 degrees F
    Exhaust A temperature              67 degrees C / 152 degrees F
    Exhaust B temperature              73 degrees C / 163 degrees F
    Total DDR DRAM                    512 MB
    Total RLDRAM                       64 MB
    Start time:                           2006-09-08 16:29:59 PDT
    Uptime:                               1 hour, 3 minutes, 4 seconds
  

  You can also issue the show chassis environment feb command to check the status of a specific FEB. In the example below, the FEB is slot 0 is used. The output is similar to the following:

  
  

  user@host> show chassis environment feb 0

  FEB 0 status:
    State                      Online
    Temperature Intake         66 degrees C / 150 degrees F
    Temperature Exhaust A      67 degrees C / 152 degrees F
    Temperature Exhaust B      73 degrees C / 163 degrees F
    Power
      1.2 V                     1153 mV
      1.5 V                     1417 mV
      1.8 V                     1704 mV
      2.5 V                     2375 mV
      3.3 V                     3138 mV
      5.0 V                     4763 mV
      1.2 V Rocket IO           1160 mV
      1.5 V Rocket IO           1408 mV
      1.8 V RLDRAM              1717 mV
    I2C Slave Revision         15