Re: You asked about multicast scope

Brian Haberman <brian@innovationslab.net> Thu, 29 March 2012 12:57 UTC

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Date: Thu, 29 Mar 2012 08:57:09 -0400
From: Brian Haberman <brian@innovationslab.net>
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To: Iljitsch van Beijnum <iljitsch@muada.com>
Subject: Re: You asked about multicast scope
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Cc: pcp@ietf.org, 6man 6man <ipv6@ietf.org>, Fred Baker <fred@cisco.com>
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On 3/29/12 8:52 AM, Iljitsch van Beijnum wrote:
> On 29 Mar 2012, at 14:15 , Brian Haberman wrote:
>
>> It is not an assumption, it is stately quite clearly in the Scoped
>> Addressing Architecture (RFC 4007).  From Section 5 :
>
>> A zone of a given scope (less than global) falls completely within
>> zones of larger scope.  That is, a smaller scope zone cannot
>> include more topology than would any larger scope zone with which
>> it shares any links or interfaces.
>
> Brian, Stig, thanks for the help.
>
> Fred: I think what would be best is to define a "service provider"
> scope that is smaller than global, and larger than organization.
> These would be defined to be forwarded to ISPs by default, although
> organizations that don't want that can always filter them at the
> desired boundary.
>

RFC 3513 describes the multicast scopes and there are some that are not 
currently defined.

Regards,
Brian