Module BM Elements

Refer to Figure 34-5 on page 1001. This example shows an IBA module with two, separate on-board IOUs, each of which contains one IOC. Each of the IOUs contain the following BM-related entities:

• A single port (port 1) connected to the IBA fabric through the chassis backplane.

• Inbound IBA SMPs arriving through the port are delivered to the port's SMI.

• The SMI passes SMP request packets to the IOU's SMA for processing. Among other SM-related attributes, this permits the SM to access the port's GUID as well as the IOU's NodeGUID.

• BM GMPs are sent and received using the port's GSI.

• The IOU's BMA receives inbound BM MADs and is also capable of sending BM MADS through the port's GSI:

  - By issuing BM MADs, the BM can access the MME and, if necessary, the MME can use its IB-ML channel to communicate with the CME that is embedded in the chassis.

  - When necessary, the CME can issue a message over the IB-ML channel to the module's MME and can also cause the MME to use the BMA to transmit a BM MAD to the BM.