InfiniBand Network Architecture

PDs and UD Service

Background On Address Handles

In order to send request packets to an UD QP on a remote CA, the following actions must be accomplished:

1. Create a local UD QP and assign it to a PD.

2. Prior to any attempt to send any messages to an UD destination, software must first execute a Create Address Handle verb call, providing the following as input parameters (note that this is a partial list):

   - The LID or GID of the destination port behind which the target UD QP resides.

   - The PD that is being assigned to this destination port.

   - The handle that identifies the HCA on which the Address Handle is to be created.

3. To send a message to a remote UD QP, software then posts a WR to a local UD QP's SQ and supplies the following as input parameters ...