Note that the topology of Teredo is fundamentally different from 6to4.
A public anycast reachable 6to4 IPv4-router service would be verydesirable, and
yes, there is a standard 6to4-router IPv4-anycastaddress you should advertise
as broadly as you have guts andconnectivity to do. It is 192.88.99.1/24.
An IPv4-Teredo server is a completely different beast. It looks to methat it
does not really need to be an anycast reachable service. Thatwhy it is called a
"server" not a relay or a router. It could becalled a Teredo Connection Setup
Server (TCSS) if IETF would have acraving for lengthy acronyms like some
standards organization have.
On the other hand, IPv4<->nativeIPv6 relays have a similar role in6to4 and
Teredo connections. They both advertise the correspondingstandard anycast
prefixes 2002::/16 and 3ffe:831f::/32 on the IPv6side and then tunnel to the
host at the IPv4-end.
Yours,Anssi, who believes Teredo is going be very popular globally in thenext
few years, and it will make the world to shift to IPv6.Unfortunately.
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