Locate a Switch Chip or Connector From the GUID

Before You Begin

The output of some InfiniBand commands identify a node by its GUID. You can determine the switch chip or InfiniBand cable connection associated with that GUID using this procedure.

1. In the output of the InfiniBand command, identify the GUID and port in question.

   For example, given the following output from the ibdiagnet command:

   -W- lid=0x0055 guid=0x0021283a8638b0c0 dev=48438 Port=21

   In this example, the GUID is 0x0021283a8638b0c0 and the port is 21.

2. Truncate all digits of the GUID except the four digits on the right.

   For example, GUID 0x0021283a8638b0c0 is truncated to b0c0.

   The b0 means that the node is inside of a Sun Datacenter InfiniBand Switch 72. The c means that the node is located in I4 switch chip C. The port is 21.

3. Use the tables in Understanding Routing Through the Switch to cross-reference the routing to other switch chips and ports and to connections.

   For example, using Switch Chip Port to CXP Connectors and Link LED Routes, I4 switch chip C, port 21 routes to connector 6A, the center LED, and the link is carried by P2.

Related Information

• Switch GUIDs Overview