[rbridge] IP Multicast groups/ layer 2 or layer 3?

[Eric Gray (LO/EUS)]

Radia,

	In my opinion, it should be a Layer 2 address.

--
Eric

> -----Original Message-----
> From: rbridge-bounces at postel.org 
> [mailto:rbridge-bounces at postel.org] On Behalf Of Radia Perlman
> Sent: Sunday, January 07, 2007 8:21 PM
> To: rbridge at postel.org
> Subject: [rbridge] IP Multicast groups/ layer 2 or layer 3?
> 
> When an RBridge  R announces via IS-IS which IP multicast groups are  
> reachable on R's directly
> attached links, should the groups be layer 3 or layer 2 addresses?
> 
> If it's layer 3, then there will have to be separate 
> announcements for 
> IPv4 and IPv6 groups.
> If it's layer 2, then 32 IPv4 groups would map to the same layer 2 
> multicast address (and I'm
> not sure what it is for IPv6).
> 
> I don't care. The spec currently says layer 2, but there is a 
> question 
> in the spec asking if that's what
> we really want.
> 
> Radia
> 
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