[ofa-general] Loopback connection not working on Chelsio

[Or Gerlitz]

pandit ib wrote:
> I'm having trouble getting loopback rdma connections working on Chelsio. We were told that loopback connections are not supported. Is this an iWarp or Chelsio specific issue? What are the issues that is preventing it from working?
Basically, thinking a bit about this, loopback communication is 
possible/trivial with IB since (I am quite sure) by spec HCA must/should 
support some sort of bridging, in other words if both QPs are on the 
same node then their communication doesn't go to the network (IB 
switches will never send a packet through the port it was received). 
Now, when your L2 network is Ethernet, you need to have someone let you 
do this U turn. When communication is going through the network stack, 
the latter takes care this, but when it doesn't you need to have support 
either at the NIC or the switch. Modern (H2/2009, later) NICs, such as 
those supporting SR-IOV and/or multiple physical functions would support 
some sort of bridging. I don't think its an iwarp limitation.

Or.