Thanks. I quite understood what you've said, and after going through the article you sent me - it was helpful. However, do you think that the Router (default Gateway) could possibly have TCA and send and receive queue pairs?
I want to know what destination Local identifier (DLID) the packets from the processing nodes (source) have so that the switches can forward packets correctly to the Gateway before it finds its way across the internet using Global Identifier (GID) to the destination.
Regards
Humphrey.