[openib-general] Problem is routing CM REQ

[Sean Hefty]

> Sean: Even if you can query both SA's there isn't enough information
> to force things to use the same router path in each direction.

My assumption is that the remote SA contains the necessary information about how 
a packet coming from the local SGID to the remote DGID would be routed on the 
remote subnet.  The returned path record must specify the SLID that the remote 
router will send from, along with the DLID that the router will map the DGID to.

Likewise for the local SA.  As long as the path is reversible, then my 
expectation is that the local router will use the returned LIDs for packets 
coming from the remote DGID to the local SGID.

The route itself is determined using the SGID, DGID, TClass, FlowLabel.  So, as 
long as the two queries match on these fields, I would think that it would work.

- Sean