[AG-TECH] IGMPv3, Source Specific Multicast, fully supported in Windows XP
Ivan R. Judson
judson at mcs.anl.gov
Fri Aug 16 10:46:35 CDT 2002
I've cc'd the OM developers list, since these are things that would be
useful to capture in the hearts and minds of those working on the tools.
I think Jeff has a good point :-), but I think it's probably only a
matter of doing some specific fiddling inside vic to make it work.
--Ivan
..........
Ivan R. Judson .~. http://www.mcs.anl.gov/~judson
Futures Laboratory .~. 630 252 0920
Argonne National Laboratory .~. 630 252 6424 Fax
> -----Original Message-----
> From: Jeffrey Eschbach [mailto:eschbach at motorola.com]
> Sent: Friday, August 16, 2002 10:36 AM
> To: judson at mcs.anl.gov; ag-tech at accessgrid.org
> Subject: Re: [AG-TECH] IGMPv3, Source Specific Multicast,
> fully supported in Windows XP
>
>
> > In the case of OM vic, this is already possible, fwiw. The
> OpenMASH
> > folks have been exploring ssm for awhile.
>
> Ya, but I think that Vic implementation only supports joining a single
> (S,G) pair. Still need a way to specify a LIST of (S,G)
> pairs or even a list of sources for a single group.
>
>
> > do they address the problem of distributing the sending sources
> > around? or is it at the level of giving vic a list of addresses.
>
> You just give Vic the (S,G) pair.
>
>
> My personal wishlist: Before Vic distributes the sources
> around, I would love to see an implementation that allows
> dynamic addition/removal of (S,G) pairs. Right now with
> (*,G) m-cast we are used to people joining/leaving a group at
> will without any trouble. With SSM Vic and no dynamic
> add/remove, users would relaunch Vic every time they want to
> add a new (S,G) pair... from an AG node perspective, imaging
> everyone in a venue having to relaunch Vic every time a new
> node joined.
>
> Jeff
>
>
>
> "Ivan R. Judson" wrote:
> >
> > In the case of OM vic, this is already possible, fwiw. The
> OpenMASH
> > folks have been exploring ssm for awhile.
> >
> > --Ivan
> >
> > ..........
> > Ivan R. Judson .~. http://www.mcs.anl.gov/~judson
> > Futures Laboratory .~. 630 252 0920
> > Argonne National Laboratory .~. 630 252 6424 Fax
> >
> >
> > > -----Original Message-----
> > > From: owner-ag-tech at mcs.anl.gov
> [mailto:owner-ag-tech at mcs.anl.gov]
> > > On Behalf Of Tony Rimovsky
> > > Sent: Friday, August 16, 2002 8:24 AM
> > > To: Jay Beavers
> > > Cc: ag-tech at accessgrid.org
> > > Subject: Re: [AG-TECH] IGMPv3, Source Specific Multicast, fully
> > > supported in Windows XP
> > >
> > >
> > > In addition to the routing and forwarding issues that
> Bill mentions,
> > > there are application changes. For example, vic and rat
> need to be
> > > able to say "i only want traffic from <list of sources>
> in <group> "
> > > or "i only want traffic from <list of source,group pairs>".
> > >
> > >
> > > On Fri, Aug 16, 2002 at 12:36:03AM -0500, Bill Nickless wrote:
> > > > At 10:01 PM 8/15/2002 -0700, Jay Beavers wrote:
> > > >
> > > > >Since I'm not a router bithead, can anyone give me a
> heads up if
> > > > >I should expect SSM to "just work" between Internet2 nodes? Or
> > > might there be
> > > > >complications?
> > > >
> > > > Hi Jay,
> > > >
> > > > To answer your specific question: the Internet2 Abilene
> network is
> > > > ready and capable of running SSM, and has been for well over a
> > > > year.
> > > >
> > > > That being said, the problem with SSM deployment revolves
> > > around the
> > > > need
> > > > for network edge devices like switches and routers to
> > > support IGMPv3. It's
> > > > difficult to find Ethernet switches that support IGMPv3,
> > > and they're not
> > > > the most economical choices.
> > > >
> > > > In a strange inversion of the normal situation, the backbone is
> > > > capable of SSM service well before the local area
> networks of the
> > > connected sites. If
> > > > you can find a site that supports SSM/IGMPv3 locally, it's
> > > a pretty good
> > > > bet that they can do SSM with most all other similar sites.
> > > >
> > > > ===
> > > > Bill Nickless http://www.mcs.anl.gov/people/nickless
> > > +1 630 252 7390
> > > > PGP:0E 0F 16 80 C5 B1 69 52 E1 44 1A A5 0E 1B 74 F7
> > > nickless at mcs.anl.gov
> > >
>
> --
> ----------------------------------------------------------------
> Jeff Eschbach eschbach at motorola.com
> Networks and Infrastructure Research
> Senior Staff Engineer, Motorola Labs Internet2 Initiative
> http://internet2.motlabs.com Fax: (847) 576-3240
> Desk: (847) 538-5846 Mobile: (847) 980-2240
>
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