Hi Christian,

FWIW I don't think that there is problem either. There have however 
been concerns that this break the IPv6 addressing model, hence my 
original message asking for opinions.

Thanks for your reply.

--julien 

On Monday 07 August 2006 18:38, Christian Vogt wrote:
> Hi Julien,
>
> I don't think there is a problem.
>
> If you use the prefix-per-MN case on a broadcast link, what you get
> is a link comprising multiple subnets.  RFC 3513 explicitly allows
> links with multiple prefixes:
>
>    Currently IPv6 continues the IPv4 model that a subnet prefix is
>    associated with one link.  Multiple subnet prefixes may be
> assigned to the same link.
>
> (This is, BTW, the passage that Dave Thaler cites in
> [draft-thaler-intarea-multilink-subnet-issues].)
>
> In the scenario you describe (the one including MNs A, B, and C),
> you simply have a link with 3 prefixes.  The unusual, but still
> legitimate circumstance in this scenario is that the MNs do not see
> their neighbors' prefixes.
>
> Note that a situation where hosts on the same link see different
> prefixes may also arise when the link has multiple routers, each
> router advertises a different set of prefixes, and no two hosts
> receive RAs from the same router due to packet loss.  The hosts
> will then not be aware of their neighbors' prefixes.  Certainly,
> this is unlikely to happen, but it may happen.
>
> Let me know if I have missed something.
>
> - Christian

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