Re: New draft on embedding the RP address in IPv6 multicast address

[Brian Haberman <bkhabs@nc.rr.com>]

Marshall Eubanks wrote:
> On Thu, 10 Oct 2002 19:12:48 -0700 (PDT)
>  Greg Shepherd <shep@juniper.net> wrote:
>
> > On Thu, 10 Oct 2002, Marshall Eubanks wrote:
[major snip]

> > > The biggest use of multicast at present, by an order of magnitude or more,
> > is
> >
> > > the distribution of financial data. Has any of this migrated to SSM ? It
> > could,
> >
> > > maybe, but will it ?
> > >
> > > The amount of money that rides on these multicast packets to me provides a
> > very
> >
> > > good indication that ASM will stick around.
Not only is it ASM, some financial data distributors are still using
DVMRP.  They like it and they know it.

> > Not a fair comparison. Financial networks are walled-gardens. In the core
> > distribution layer of the network, all S,Gs are well-known and in many
> > casses are ~gauranteed to be delivered too the edge layers by static
> > S,G-joins - VERY SSM-like.
And because the S's are known, they can use dynamic filters to switch
to backup sources when connectivity goes down.

> >
>
> Hi Greg;
>
> I do not disagree - its just that I think that they will resist change.
>
>
> > The growth in many-to-many at the edge networks is beginning to highlight
> > the need for BiDir - over the next 2 years.
So, back to an interesting discussion point.  Do we need to worry about
ASM in v6?  Should we as the multicast standards community try and
move things toward SSM?

Brian