[ofa-general] [BUG report / PATCH] fix race in the core multicast management

[Sean Hefty]

>>>>>> node 1 <-> switch A <-> switch B <-> switch C <-> SA
{snip}
>> No, it is not (dropped from all multicast groups it is joined to). It
>> may be removed from the multicast forwarding tables if there is no route
>> available but it is still a member of the group.
> 
> So the node (port) is a member of a multicast group for which routing is 
> not configured but when the port is discovered again, the SM runs the 
> multicast routing engine (for all groups? for all groups for which 
> discovered ports are member of?) again and configures the routing, nice.

I'm getting lost regarding the problem.  If I understand correctly, 
multicast will work fine if the link between switches A & B are brought 
down/up.  But if the link is brought down/up between switch A and node 1 
(similar to the first reported issue) multicast fails?

- Sean