Re: RS sending in draft-ietf-v6ops-ipv6-cpe-router-04

[Philip Homburg <pch-v6ops@u-1.phicoh.com>]

In your letter dated Mon, 26 Apr 2010 15:21:09 +0200 you wrote:
>> The MAC address is available as the source ethernet address in the router
>> solicitation.
>> 
>> How does having a link-local IPv6 address help?
>
>It helps in being able to bind the MAC to an IPv6 address for that
>subscriber. Coincidentally, this is exactly what is already in place for v4.

Why the link local address? 

>Without such a binding, LL spoofing becomes an issue.

Can you be a bit more specific?

IPv4 doesn't have a link local address.

So what kind of traffic do you expect to and from the link-local address.
There is of course the neighbor discovery stuff. But you probably have to
filter that already to avoid customers talking directly to each other
without going through the router.