Re: [MBONED] Input for 3171bis

[Marshall Eubanks <tme at multicasttech.com>]

Dear Stig;

On Mar 4, 2009, at 3:59 AM, Stig Venaas wrote:

> Marshall Eubanks wrote:
> > On Mar 3, 2009, at 12:39 PM, Michelle Cotton wrote:
> > > Once again, SSM addresses should also be globally unique and
> > > thus someone should monitor these as well. Shouldn't this be
> > > clarified?
> > I do not see why there is any need for globally unique SSM  
> > addresses. The channel
> > address (the S,G tuple) needs to be unique, but that can be done by  
> > the holder of "S".
>
> The only possible issue is at layer 2. It's not good if everyone uses
> G's that result in the same layer 2 addresses. Randomness might be
> better than uniqueness for this.

Yes, because of multicast group to MAC collisions. I don't think that  
the solution
to this is by assignment.

> I wouldn't completely rule out that some application may want to get
> a well-known SSM group. We do have this for IPv6.

To date, none have. However, if someone did, and could make a case for  
it, I don't see
why they couldn't just apply for it in IANA or put it in an RFC.

Regards
Marshall

> Stig
>
> > Regards
> > Marshall
> > > Comments by Pekka Savola (03/09/2008)
> > >
> > > We have gone through the comments made by Pekka. Some of them will  
> > > be
> > > addressed in an updated version of this document.  Others will be  
> > > addressed
> > > in a future policy document.  This document it meant to cover more  
> > > of the
> > > procedures for IANA to follow regarding assignments.  We will  
> > > begin working
> > > on the policy document after this document has been published.  We  
> > > would
> > > like to re-start policy related discussions when we begin working  
> > > on that
> > > document.
> > >
> > >
> > > Please see version 05 of this document that is being Last Called  
> > > and submit
> > > all comments so that we can review and address them.
> > > Marshall can assist with answering questions as he is currently  
> > > the IESG
> > > designated multicast expert.
> > >
> > > Thank you for your time and efforts.
> > >
> > > Michelle Cotton
> > > Leo Vegoda
> > > IANA
> > >
> > >
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