All things related to multicast

[Marshall Eubanks <>]

Hi;

David Farmer wrote:

> I would like to thank Kevin and Marshall for bring us back on topic
>
> On 7 Aug 2002 Marshall Eubanks wrote:
>
>
> > An on topic post !
> >
> > Kevin C. Almeroth wrote:
> >
> >
> > > Well, I've been very careful not to exclude work on IPv6 ASM... 
> > > just to say that SSM is a lower hanging fruit and it will be the
> > > first place we start.
>
> I agree that SSM is the place to start for IPv6 multicast on I2 and 
> more specifically on the Abilene backbone.  
>
>
> > > As for the value of ASM, it certainly has a niche.  The point though
> > > is to separate ASM from MSDP and come up with some additional 
> > > options. 'Cause right now, ASM using MSDP stinks.  So maybe that 
> > > second option moves the source discovery functionality out of the 
> > > network. 
>
> I think we can quickly get SSM for IPv6 working with help from 
> vendors.  Which correct me if I am wrong, this requires PIM-SM for 
> IPv6 and Multicast IPv6 NLRI for BGP.  And just as important, what 
> are the host protocols needed IGMP??  And what host OSes 
> support IPv6 multicast, what work is needed there?


MLD replaces IGMP, and you need MLD v2

http://www.ietf.org/internet-drafts/draft-vida-mld-v2-03.txt

which I do not think is avalable anywhere.

Marshall


> Once that is done we can tackle the question of MSDP for IPv6, a 
> replacement for MSDP for IPv6, or what I believe is needed from the 
> SSM folks a draft explaining how any situation in ASM can be 
> emulated with a registration via unicast to a well known registry 
> host(s) per application for the admitted limited set of applications 
> that need ASM.  Maybe this exists, but then you should be pointing 
> us to it.  But the MSDP debate can not be allowed to slow down 
> IPv6 multicast on Abilene and since most of the obvious short term 
> applications can be met with SSM let's to that first.
>
> I also think we should look at rethinking multicast as a whole like Bill 
> Nickless is talking about, but I'm not sure IPv6 Multicast on Abilene 
> should wait for that.
>
>
>
> > What, exactly, is the plan to make IPv6 multicast multidomain ? Will
> > BGMP come back from the dead ? Or will MSDP-NG rear its head? 
> >
> > If nothing is done, then someone will port MSDP to IPv6, and it will
> > be deja vu all over again.  
>
> I agree, but I put the responsibility for this on the SSM faithful, they 
> need to convince the ASM faithful and the rest of us on the fence 
> that we can live with out MSDP or a replacement router based 
> source discovery protocol.  Otherwise MSDP or a replacement will 
> be created for IPv6.
>
>
> > Unless some vendor is going to jump on BGMP in a big way, I would urge
> > that work begin immediately to make MSDP into something that will last. 
> >
> > Just my $ 0.02 worth.
> >
> > Marshall
> >
> >
> >
> > > -Kevin
>
> =================================================
> David Farmer                            Email:  
>
> Office of Information Technology
> University of Minnesota                 Phone:  612-626-0815
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> Minneapolis, MN 55414-3029              FAX:    612-624-4035
> =================================================


--
                                 Regards
                                 Marshall Eubanks

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