[openib-general] IPoIB multicast group creation

[Fabian Tillier]

On 3/1/06, Sean Hefty <sean.hefty at intel.com> wrote:
> >For the broadcast group, it depends on the SM having pre-created the
> >broadcast group.  It only does a join (i.e. component mask doesn't
> >provide all the settings to create the group) for the broadcast group.
>
> This is what I thought.  I just didn't understand why there was code to create
> new groups.

That's for IP multicast groups.

> >Once in the broadcast group, it uses it as a template for all other
> >groups, which allows it to issue a join with all paramters necessary
> >to create the group if it doesn't exist already.  I believe the only
> >field that changes is the MGID.
>
> Are the new groups for IP multicast groups?

Yes, some of which are joined as send-only members, and some as full
members, depending which path initiates the join.

- Fab