On 8/4/11 3:36 AM, "Ole Troan" <[email protected]> wrote:
>John, > >[...] > >>> in the autonomous case where each border router injects its own >>> understanding of what the site prefix is, into the home, this is not a >>> problem. you'll get one prefix for each ISP. >> [jjmb] but does this solve the problem? These prefixes will both be >> active simultaneously? If yes, this can also be done using DHCPv6 no? > >if you are multi-homed, then that will result in multiple prefixes, one >from each ISP. >if you have one CPE connected to each ISP, then downstream routers will >if they were using some form of hierarchical DHCP PD, have to request >prefixes from each CPE. as Philip pointed out, there is nothing in the >DHCP spec prohibiting a requesting router to choose all servers that >advertise themselves, instead of just one. I don't think that's current >DHCP client behaviour though. [jjmb] in this case each edge CPE router will offer a unique prefix. Unless the downstream routers issue separate DHCPv6 requests I imagine only one would be accepted by the downstream router at any time. The only thing that comes to mind to allow one prefix from being selected over another (which is non-deterministic) is DHCPv6 preference. If the second CPE uses something less than 255 this would increase the chances the prefix from the first CPE router would be selected. > >cheers, >Ole _______________________________________________ homenet mailing list [email protected] https://www.ietf.org/mailman/listinfo/homenet
