On 8/3/11 2:48 AM, "Ole Troan" <[email protected]> wrote: >John, > >[...] > >>> 3. DHCP PD does not handle the multi-home / multi-prefix case. an IGP >>> based solution would. >> [jjmb] can you elaborate on this? Why not? > >in the PD based solution for a self configuring mechanism, the Border >Router would be the PD delegating router for the home network. that's the >router receiving the delegated prefix from the ISP. downstream routers >will use this router as a DHCP server for their PD requests. > >what happens if you have multiple border routers? a downstream requesting >router can only use one DHCP server, and there isn't as far as I know any >protocol mechanism for multiple DHCP servers to synchronize and exchange >information between themselves. [jjmb] when you say synchronizing are referring to failover or simply a means to coordinate which server is doing what? Regardless, you are correct there is not such mechanism, however, dhc has recently started work on failover for DHCPv6. If preference is the goal one server could use a higher DHCPv6 preference than the other. There would still have to be a negotiation mechanism. > >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? > >cheers, >Ole >
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