All things related to multicast

[Pekka Savola <>]

On Sat, 20 May 2006, Richard Mavrogeanes wrote:
> Well, the next release supports IPV6, and perhaps multicast too.
>
> The trouble/question is local Ethernet switch support ("snooping" 
> behavior), and I'm hoping someone has some war stories to share.  It was 
> bad enough getting the switch vendors fully onboard with IGMP, and I 
> wonder where they are with IPV6 multicast.  Obviously, IPV6 is not so 
> useful if it can't reach the end user (desktop).

Well, IPv4 IGMP snooping should NOT block IPv6 multicast.  If it does, the 
implementation is buggy.

However, some network administrators might not appreciate flooding the LAN 
with v6 multicast either, but with gigabit networks, at least that isn't a 
big issue for us (which is why we haven't been pushing MLD snooping hard 
in our CFP's).

>         -----Original Message-----
>         From: Alan Crosswell 
> [mailto:]
>         Sent: Sat 5/20/2006 12:54 PM
>         To: Richard Mavrogeanes
>         Cc: 
>
>         Subject: Re: IPV6 Multicast
>
>
>
>         Abiline and most of the gigapops support it.  There are some issues 
> with
>          some international networks not yet support embedded RP.  Campuses 
> are
>         pretty far behind.  NYU is one of the few that has done v6 multicast
>         with NYSERNet.  In the first ever v6 multicast hands on workshop in
>         Albuquerque a few months ago, we viewed content that was being 
> multicast
>         from Syracuse.
>
>         Put it in a product and I'll have an excuse to replace my Vbrick 
> 1200's:-)
>
>         /a
>
>         Richard Mavrogeanes wrote:
>         > I'd like to explore this group's experience with IPV6 multicast, in 
> particular, what do we believe is the current state of the Internet2 backbone 
> network and what do we think is the state of enterprise routers and switches to 
> allow it?
>         >
>         > Looking forward to an interesting thread...
>         >
>         > /rich
>         >