Hi Dan, On Friday 08 January 2010, Dan Wing wrote: > Why is that only a MAY? I mean, without the CE doing DHCPv6 towards > the Service Provider's network, is there some other way the CE router > learns the IPv6 network's DNS servers so it can propagate those > DNS servers to hosts connecting to the CE router? (I hope the answer > is not 'manual configuration'). Both for IPv4 and IPv6 there are two options (known to me) to get the upstream DNS servers. IPv4 based DNS servers: *PPP option ms-dns (SP to CE only) *DHCPv4 IPv6 based DNS servers: *RA with DNS option *DHCPv6 In all cases the CE always has the option to not use a forwarding DNS server at all and instead have a resolver that traverses from the root-zone servers directly (although DNS operators usually do not like this in widely distributed consumer boxes, since it eats up bandwidth). And of course there _is_ manual configuration, which is usually not the users favourite option. Konrad
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