> I don't think that is the main problem - though clearly the way things
> are now (for better or worse) rdma cm requires the IPoIB subnet to
> span all of the IB subnets.. The main problem with the protocol is in
> the LID selection for routed paths on the passive side. It can't rely
> on the active side to identify the lids if a router is involved.

Are you referring to the SLID in the CM REQ?  If so, I've been looking at this
issue as well.  I simply cannot think of any way to come up with this LID, and
my current solution is to punt this problem over to the passive side, which
could use the SLID of the router that the CM REQ is received from.  If not,
well, then I just rambled more than usual.

- Sean

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