[openib-general] [Fwd: RE: IB mcast question]

[Hal Rosenstock]

On Tue, 2006-08-15 at 17:40, Sean Hefty wrote:
> >p.145 13) where it states that "Further, in addition to having the same
> >MGID, all members of the multicast group must share the same P_Key and
> >Q_Key.
> >
> >That is compliance per C4-3 on p. 143.
> 
> Thanks - my take is that the compliance breaks when the QPs are first created
> with the wrong QKey.

Yes, I think so too.

> Then, as Roland said, in order to support a QP using multiple multicast groups,
> we need all QKeys to be the same (for the RDMA CM).

Does 1 QP need to support multiple multicast groups ? If so, I agree.
That was the point I missed before.

>   If we want to do anything
> with port numbers, we probably need to fold those into the MGID.

I'm not quite following you yet on this.

-- Hal

> - Sean