Jean-Jacques Pansiot wrote:
Jari Arkko wrote:
[EMAIL PROTECTED] wrote:
Hi all,
The 2nd paragraph in 4.6 looks like:
If an application is going to support Source-Specific Multicast,
it "SHOULD support MLDv2 but MAY support MLDv1 and conform to the
Source-Specific Multicast overview document [RFC3569]; refer to
Source-Specific Multicast architecture document for details [SSMARCH].
I think that is sufficient strength to address Jean-Jacques concern,
as SHOULD is quite strong.
Hmm.... I think RFC 3569 says that you can only do SSM with MLDv2,
not with MLDv1. Also, I wouldn't put an informative document like
3569 after a keyword.
We need to put Brian's SHOULD..MAY suggestion into the text, but
in a slightly different form. Here is one suggested rewrite:
4.6 Multicast Listener Discovery (MLD)
Nodes that need to join multicast groups SHOULD implement MLDv2
[MLDv2]. However, if the node has applications which only need
support for Any-Source Multicast [RFC3569], the node MAY implement
MLDv1 [MLDv1] instead. If the node has applications which need
support for Source-Specific Multicast [RFC3569, SSMARCH], the
node MUST support MLDv2 [MLDv2].
When MLD is used, the rules in "Source Address Selection for the
Multicast Listener Discovery (MLD) Protocol" [RFC-3590] MUST be
followed.
I agree with Jari,
moreover, MLDv2 is not only necessary for SSM but also useful to
select sources
in an ASM group (using the source filter API :
draft-ietf-magma-msf-api-05.txt
). If a host implementing MLDv1 is a member of group G, then all
other receivers of the same group (and implementing MLDv2) must use
MLDv1 (and therefore cannot express their sources of interest) for
this group until
this host leaves the group.
Jean-Jacques
--Jari
--------------------------------------------------------------------
IETF IPv6 working group mailing list
[EMAIL PROTECTED]
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
--------------------------------------------------------------------
IETF IPv6 working group mailing list
[EMAIL PROTECTED]
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
--------------------------------------------------------------------
IETF IPv6 working group mailing list
[EMAIL PROTECTED]
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------
