On 22 Feb 2006 06:32:29 -0500, Hal Rosenstock <[EMAIL PROTECTED]> wrote: > On Wed, 2006-02-22 at 02:40, Fabian Tillier wrote: > > On 2/21/06, Greg Lindahl <[EMAIL PROTECTED]> wrote: > > > On Tue, Feb 21, 2006 at 08:17:02PM -0800, Fabian Tillier wrote: > > > > > > > The node joining or creating the multicast group doesn't need to > > > > specify the rate - the SA can figure out the rate to use based on the > > > > requestor (for creation), or validate that the requestor supports the > > > > existing group's rate (for joining). > > > > > > Um, but that gets back to my point: I want 1X, 4X SDR, and 4X DDR > > > nodes running IPoIB to share a multicast group. Are you saying this > > > can be done by making the group a 1X group? Or that it's impossible > > > to have such a group? Or that everyone would have to drop to 1X to > > > make such a group? > > > > You'd have to make the group 1X. Note that the group being 1X doesn't > > limit unicast traffic to 1X rates, since the rate for unicast traffic > > would be set based on the rate reported in the path records for the > > various endpoints. > > It does, however, limit all other (IB) multicast groups in that > partition to the same rate as the IPoIB broadcast group. That may be the > correct choice of the admin (and 1x nodes would be refused).
I agree that 1X nodes are likely erroneous, and it's fine (and probably preferable) for an admin to cause these to be refused. I started this thread with the intent on figuring out how to distinguish refusal from some other failures, so that IPoIB could log the appropriate event and a system administrator could identify that there was a bad link in the fabric. The IB spec doesn't provide for a mechanism to do that, and Hal and I will work to change that. - Fab _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
