On Tue, 2006-08-15 at 16:12 -0400, Hal Rosenstock wrote: > On Tue, 2006-08-15 at 15:59, Roland Dreier wrote: > > > This is what I was referring to. I'm really not familiar with IP > > multicast > > > beyond what I read in a book while coding the RDMA CM. It sounds like > > we might > > > be able to use the QKey as the port number for the QP to mimic the > > behavior. > > > > I don't see how this could work-- to mimic IP, an app has to be able > > to multicast a datagram to multiple destination ports using the same > > multicast group. Since IB multicast groups have a Q_Key associated, > > the only way this could work is if all QPs and MCGs share one Q_Key. > > Isn't it all QPs on the same MCG need to share one Q_Key ? >
>From my experimentation, only the qkeys of the QPs need match. The MCG qkey is only needed for sending to the group. Am I confused? (often the case :) _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
