>After some discussion on the list, I'd like to
>propose the following text for MLD in the cellular
>host draft:
> 2.9 RFC2710 - Multicast Listener Discovery (MLD) for IPv6
>
> MLD may be supported by cellular hosts.
>
> 2.9.1 MLD in 3GPP networks
>
> Within 3GPP networks, hosts are connected to their
> default routers (GGSN) via point-to-point links.
> Consequently, hosts cannot communicate directly with
> each other using link-local addresses. Hence, joining
> multicast groups for link-local multicast addresses is
> not required. However, MLD is required when hosts run
> applications that need to join multicast groups whose
> scopes are larger than the link scope.
i still don't understand why you are trying to impose additional
restriction for link-local multicast groups (maybe i'm dumb).
without MLD joins for link-local multicast groups, default routers
won't be able to know which multicast group the 3GPP node is
interested in. there's no special text available in RFC2710 for
p2p links.
itojun
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