InfiniBand Network Architecture

Enabling APM

Software enables APM in the following manner (this discussion assumes that a local and remote QP are just being created and set up by software):

1. The local QP or EEC is created and programmed (via the Modify QP or Modify EEC verb) with both the primary and alternate path information specified in Table 23-1 on page 578 or Table 23-2 on page 580.

2. The local CA's CM is instructed to send a REQ message to the remote CA's CM requesting the creation of a new QP or EEC. The REQ message contains both the primary and alternate path information to be assigned to the new QP or EEC. A non-zero value in the Alternate Local Port LID field of the REQ message indicates to the receiving CM that APM activation has been requested.

3. The remote CA's CM creates ...