Re: comments on draft-kashyap-ipoib-connected-mode-02.txt

Michael Krause wrote:
>No.  It uses InfiniBand RC or UC to communicate IP datagrams (v4 / 
>v6) between connected endnodes.

And what is InfiniBand RC, under the covers?

>Rest is based on a misconception as there is only IB below IP and no 
>tunneling of TCP over TCP occurs.

Well, I know that there is another IP(v6) in there, as IB is very 
closely based on IPv6.  Is RC based on TCP? SCTP?  Or did IB define a 
different reliable, connection-oriented IP protocol?  If the latter, 
what type of retransmission and congestion control algorithms are 
used by IB RC?  And, has there been any study regarding how they 
would interact with the retransmission and congestion control 
algorithms of TCP or other reliable upper-layer transports?

Even if this isn't TCP, per se, there may still be issues, but it 
will take more careful research to determine what they are.

Margaret