[ofa-general] Re: multicast join failed for...

[Hal Rosenstock]

On Wed, 2007-04-11 at 03:22, Michael S. Tsirkin wrote:
> > Are all your ports DDR or do you have a mix ? If all are DDR, you can
> > configure the default partition to use this rate.
> 
> If I get this right, user has to manually configure the rate in a mixed subnet.
> Is that correct?

I'm not sure; It is an experiment to try to gather additional data to
see if the error went away. There was only sparse data with the email
problem report and I dont have a mixed subnet to try this in.

I do know that it used to work with 4x/1x ports in the same group so I'm
not sure why DDR/SDR ports wouldn't work in the same group.

> If yes, I'm actually not too happy with this.
> 
> Would something like the following heuristic work better?
> - select the max rate between all participants

The issue is that one doesn't know all the participants in a group as
they are joined dynamically.

(I think we've been over this aspect on the list several times in the
past.)

> - when a host with lower rate joins, destroy the group

I don't think a group can be destroyed like this "underneath" its
existing members.

-- Hal

>   and recreate it with lower rate, send every other participants
>   a reregister MAD