Power Off a Fabric Card

In this procedure, you use issue commands to both the CMC and the Linux InfiniBand host.

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Caution - Before beginning this procedure, have a replacement fabric card or replacement fabric card filler prepared and standing by for immediate installation. A quick exchange is necessary to maintain chassis thermal management.

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1. Identify the prerequisite and subsequent tasks you must perform in conjunction with this procedure, to achieve a goal.

   See the table in Servicing the Fabric Cards and Fabric Card Fillers.

2. Power off the fabric card from the CMC, using the deactivate command.

   For example, if you are removing fabric card 0:

   # deactivate fc 0
   Deactivating FC 0
   Pigeon Point Shelf Manager Command Line Interpreter
        Command issued via IPMB, status = 0 (0x0)
        Command executed successfully
   #

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   Note - Once deactivated and disabled, the links provided by the fabric card are now lost. The Subnet Manager attempts to establish new routes for those links while you continue the procedure.

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3. If you are permanently removing a fabric card from an InfiniBand fabric using the fat-tree routing algorithm, you must remove the respective GUIDs from the /etc/opensm/guid.txt file.

   Otherwise, go to Step 4.

   1. Type the following command on the CMC to retrieve the fabric card base GUID:

      # getbaseguid fc slot

      where slot is the number of the fabric card to be removed. For example:

      # getbaseguid fc 0
      Base GUID = 0x00bad0fc0009f000
      #

   2. For the GUID, add the following values to make two new sums:

      • 0xa2

      • 0xb2

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      Note - For a GUID that ends with two zeros (00), you are effectively replacing the zeros with a2 and b2.

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      For example, 0x00bad0fc0009f000 becomes:

      • 0x00bad0fc0009f0a2

      • 0x00bad0fc0009f0b2

   3. On the Linux InfiniBand host, use a text editor to remove these two entries from the /etc/opensm/guid.txt file.
   4. Restart the Subnet Manager on the Linux InfiniBand host:

      # /etc/init.d/opensmd stop
      Stopping IB Subnet Manager..-.                             [  OK  ]
      # /etc/init.d/opensmd start
      Starting IB Subnet Manager.                                [  OK  ]
      #

4. Disable the fabric card from the CMC with the disableboard command.

   For example, to disable fabric card 0:

   # disableboard fc 0
   fc 0 is M1 state, turning off stby
   STBY for fc 0 is off
   #

5. Remove the fabric card.

   See Remove a Fabric Card or Fabric Card Filler.

Related Information

• Switch Reference, deactivate command

• Switch Reference, getbaseguid command

• Switch Reference, opensm command

• Switch Reference, disableboard command

• Power On a Fabric Card

• Power Off a Power Supply

• Power Off a CMC

• Power Off a Line Card