All things related to multicast

[Matthew Davy <>]

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So it seems like the consensus was to allow MSDP SA's only for groups  
in 224/8 and 233/8.     Now's the time to speak up if you think this  
is a bad idea.

- - Matt

Matthew Davy
Abilene Network Operations Center

 / 812.855.7728


On May 30, 2006, at 7:55 PM, David Farmer wrote:

> Several thoughts:
>
> 1. I don't think traffic filters should be put in place blocking  
> traffic for the
> IANA Reserved Groups only MSDP filters, at least on the Abilene  
> Backbone
>
> 2. If new /8s are allocated from the Reserved Groups, why would you  
> think
> they would use the ASM especially with MSDP?  I would think 224/8 and
> 233/8 for GLOP should be enough, for ASM, especially using MSDP.  We
> need to keep an eye on 32bit ASNs though, but even all of the  
> remaining
> Reserved Groups wouldn't be enough to simply extend the current GLOP
> allocation model to 32bit ASNs.
>
> 3. If future use of the Reserved Groups will not be using MSDP,  
> then filtering
> it from MSDP now would be an advantage.  Doing it later will just  
> allow more
> garbage to squat on the groups and cause more problems in the future.
>
> 4. Filtering these groups from MSDP doesn't prevent other non-MSDP  
> uses
> of the Reserved Groups, as long as you don't put in traffic filters  
> (see #1).
>
> 5. Further, not that I'm recommending it, but SSM traffic could  
> still be
> passed on the Reserved Groups.  If it is OK to have MSDP running  
> for all
> the Reserved groups why aren't all routers configured to do SSM on the
> Reserved Groups?
>
> I'd still like to see some group usage data specific to Abilene
>
> I seem to feel a consensus building (but not unanimous, I'll grant  
> you) for
> filtering the IANA Reserved Groups from Abilene's MSDP.  Is anyone
> adamantly against the idea?  (please speak up)
>
> =================================================
> David Farmer                            Email:  
>
> Office of Information Technology
> University of Minnesota                 Phone:  612-626-0815
> 2218 University Ave SE                  Cell:   612-812-9952
> Minneapolis, MN 55414-3029              FAX:    612-626-1818
> =================================================

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