In message <ca5e14c5.158338%[email protected]>, "Brzozowski, Jo hn" writes: > > On 8/2/11 7:37 PM, "Mark Andrews" <[email protected]> wrote: > > > > >In message <ca5dea74.158185%[email protected]>, > >"Brzozowski, Jo > >hn" writes: > >> This is something that should be today as part of broadband IPv6 > >> deployments to prevent conflict at the service provider edge. I cannot > >> think of a good reason why I would want to accept IPv6 router > >> advertisements, at this time from residential gateways. > > > >If they advertise the /64's of the /56 they are using you can filter > >the unrequested traffic and also prevent looping packets when they > >send the rest of the /56 back to you. If we don't do something > >like this the border CPE router has to have a null route covering > >the /56 (or whatever upstream has delegated to it) which would be > >a good thing to do regardless. > > > >Seeing the /64's also gives you a insight into whether you can > >allocate on the /60 boundary or not. Similarly if you need to > >start planning for /52's rather than /56's. > [jjmb] I don=B9t get it. If I (the provider) delegated a /56 I already know > that I delegated the same to the end user. I have no need to receive any > router advertisements from the WAN interface of the end users gateway. In > the case I am referring to DHCPv6 is used to dynamically delegate an IPv6 > prefix of some length plus a globally routable /128 for the WAN interface.
I mis-interpreted the message I replied to, i.e. RA's vs routes. > >Mark > > > >> John > >> = > > >> On 8/2/11 1:47 AM, "Michael Newbery" <[email protected]> wrote: > >> = > > >> >It's outside the CPE spec, but I can see that the document could state, > >> >as an assumption, that the ISP will filter routing advertisements from > >> >the CPE and will only pass those that it has determined (via some > >> >external mechanism, undefined in this document) belong to the CPE. > >> = > > >> _______________________________________________ > >> homenet mailing list > >> [email protected] > >> https://www.ietf.org/mailman/listinfo/homenet > >-- = > > >Mark Andrews, ISC > >1 Seymour St., Dundas Valley, NSW 2117, Australia > >PHONE: +61 2 9871 4742 INTERNET: [email protected] > > _______________________________________________ > homenet mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/homenet -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: [email protected] _______________________________________________ homenet mailing list [email protected] https://www.ietf.org/mailman/listinfo/homenet
