In a dual stack
network, a dual stack node can find your DNS servers via
configured IPv4
addresses, and get both IPv4 and IPv6 addresses back
for dual stack
targets, after which IPv6 traffic can proceed.
How does an
IPv6-only node find the DNS server(s). I assume this is
where the new
anycast addresses come in. Will the IPv6 only node try
to connect to the
magic IPv6 DNS anycast address, and the "closest"
IPv6 capable DNS
server will respond?
How does that DNS
node know to respond to that anycast address?
Do you manually
assign the IPv6 DNS anycast address to every DNS
server?
Would this still
work if the "closest" DNS server was beyond your router?
Can the DNS anycast
address route out through your firewall?
Is there some other
way to manually specify the addresses of your
preferred DNS
servers on an IPv6-only node?
Can you block the
DNS anycast address from going beyond your
gateway to insure
that internal nodes will get your internal DNS server,
and not some extenal
one?
Lawrence
Hughes
CTO, InfoWeapons
Corporation
Cebu,
Philippines
