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InfiniBand Network Architecture by MindShare, Inc., Tom Shanley

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The Major Differences from RC

Connection Establishment

In RC, Two QPs Are Connected Together

When using the RC transport service, a pair of RC QPs are connected to each other and transmit messages to and from each other and no one else.

In RD, Two EECs Are Connected Together

When using the RD transport service, on the other hand, RD QPs do not communicate directly with each other. Rather, each WR posted to the SQ of a RD QP identifies a local EEC to be used as the conduit (i.e., the RDC) in sending messages to and receiving messages from RD QPs in a remote CA. The WR also specifies the QPN of the destination remote RD QP.

Obviously, before a RDC can be used to transmit and receive messages, it must be created. This requires the creation of an ...

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