Determine Changes to the InfiniBand Fabric Topology

If your fabric has a number of nodes that are suspect, the osmtest command enables you to take a “snapshot” (inventory file) of your fabric and at a later time compare that file to the present conditions.

1. Initiate the Subnet Manager.

2. Take a “snapshot” of the fabric topology.

   # osmtest -f c
   Command Line Arguments
   Done with args
    Flow = Create Inventory
   Aug 13 19:44:53 601222 [B7D466C0] 0x7f -> Setting log level to: 0x03
   Aug 13 19:44:53 601969 [B7D466C0] 0x02 -> osm_vendor_init: 1000 pending umads specified
   using default guid 0x21283a8620b0f0
   Aug 13 19:44:53 612312 [B7D466C0] 0x02 -> osm_vendor_bind: Binding to port 0x21283a8620b0f0
   Aug 13 19:44:53 636876 [B7D466C0] 0x02 -> osmtest_validate_sa_class_port_info: 
   -----------------------------
   SA Class Port Info:
    base_ver:1
    class_ver:2
    cap_mask:0x2602
    cap_mask2:0x0
    resp_time_val:0x10
   -----------------------------
   OSMTEST: TEST "Create Inventory" PASS
   #

3. After an event, compare the present topology to that saved in the inventory file:

   # osmtest -f v
   Command Line Arguments
   Done with args
    Flow = Validate Inventory
   Aug 13 19:45:02 342143 [B7EF96C0] 0x7f -> Setting log level to: 0x03
   Aug 13 19:45:02 342857 [B7EF96C0] 0x02 -> osm_vendor_init: 1000 pending umads specified
   using default guid 0x21283a8620b0f0
   Aug 13 19:45:02 351555 [B7EF96C0] 0x02 -> osm_vendor_bind: Binding to port 0x21283a8620b0f0
   Aug 13 19:45:02 375997 [B7EF96C0] 0x02 -> osmtest_validate_sa_class_port_info: 
   -----------------------------
   SA Class Port Info:
    base_ver:1
    class_ver:2
    cap_mask:0x2602
    cap_mask2:0x0
    resp_time_val:0x10
   -----------------------------
   Aug 13 19:45:02 378991 [B7EF96C0] 0x01 -> osmtest_validate_node_data: Checking node 0x0021283a8620b0a0, LID 0x14
   Aug 13 19:45:02 379172 [B7EF96C0] 0x01 -> osmtest_validate_node_data: Checking node 0x0021283a8620b0b0, LID 0x15
   .
   .
   .
   Aug 13 19:45:02 480201 [B7EF96C0] 0x01 -> osmtest_validate_single_path_rec_guid_pair: 
        Checking src 0x0021283a8620b0f0 to dest 0x0021283a8620b0f0
   Aug 13 19:45:02 480588 [B7EF96C0] 0x01 -> osmtest_validate_path_data: Checking path SLID 0x19 to DLID 0x19
   Aug 13 19:45:02 480989 [B7EF96C0] 0x02 -> osmtest_run: 
   ***************** ALL TESTS PASS *****************
   OSMTEST: TEST "Validate Inventory" PASS
   #

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   Note - Depending on the size of your InfiniBand fabric, the output from the osmtest command could be tens of thousands of lines long.

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Related Information

• Switch Reference, osmtest command

• Display the InfiniBand Fabric Topology