[ofa-general] Question about rdma_cm

[Sean Hefty]

>For the remote HCA, I can't workout how is the transition done between
>the destination IP and the lid.
>
>Can anyone enlighten me?

The remote IP address is mapped to what IP considers to be the L2 address
(typically using ARP).  The 'L2' address contains the destination GID.  The
rdma_resolve_route() call performs a path record query to the SM using the local
address (SGID and PKey) and remote address (DGID) to obtain a usable path,
including the LIDs.

- Sean