[ofa-general] Question about rdma_cm

[Nicolas Morey Chaisemartin]

Hello,

I'm trying to understand how rdma_cm works. More precisely, how it finds 
which device (local) and guid/lid (remote) to use.

For the local device if I have understood well:
-Using ip_dev_find, we get an IP (IPoIB or not) device which has a route 
to the destination IP.
-We use the first port of the first device which has an IP matching.

For the remote HCA, I can't workout how is the transition done between 
the destination IP and the lid.

Can anyone enlighten me?


Best Regards

Nicolas