UD Multicasting

Creating a Group

Before any UD QPs can become members of a multicast group, the group must be created. A UD multicast group is created in the following manner:

An administrative application (outside the scope of the specification) creates a UD multicast group by creating an MCGroupRecord in the SA database (“MCGroupRecord” on page 969 defines how this is accomplished). When creating the database record, the application may either specify the multicast GID address that will act as the group identifier or it may leave it to the SA to assign an available multicast GID address.
When the application instructs the SA to create the group record in its database, the SA automatically assigns a multicast LID address identifier for ...

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