[rbridge] per-VLAN instances of IS-IS

[Joe Touch]

Anoop Ghanwani wrote:
>  
> 
>> -----Original Message-----
>> From: Eric Gray (LO/EUS) [mailto:eric.gray at ericsson.com] 
...
>> In fact, I believe it is the case that most networks use IP 
>> multicast almost exclusively for routing protocols (for which 
>> we have previously concluded IGMP snooping does not work).
> 
> I'd recommend looking at some of the IP multicast
> applications that enterprises deploy.  It's not just
> routing protocols.

IPv6 uses multicast for neighbor discovery too.

And, as Eric notes later, a common path between the two is needed at L2.

As to the pruning that Anoop later notes, I don't consider pruning an
issue for an L2 system. Although I appreciate pruning as an
optimization, I don't consider it a design requirement. If it were, we
would be talking about scalability beyond existing bridge capabilities,
which has been off the table from the start.

Joe

-- 
----------------------------------------
Joe Touch
Sr. Network Engineer, USAF TSAT Space Segment

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