Locating a Specific CA
During its initial probing of the subnet, the SM discovers each device, its operational characteristics, and its identity (see “Each Device Has Device-Level Identifiers” on page 158). After assigning addresses to each port on a CA or router, and to the management port on a switch, the SM builds the topology database known as the SA. When software wishes to determine if a particular device exists in the subnet, it may issue a query to the SA in the form of a SubnAdmGet(NodeRecord) GMP. In the GMP, software provides the SA with the device GUID (i.e., NodeInfo.NodeGUID) that it is looking for. If the SA has one or more NodeRecords that contain the desired NodeGUID value, it returns those NodeRecords to software. It should ...
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