Rémi Després wrote: [..] > Using 6to4 between two 6to4 user sites is NOT a problem, and indeed MUST > remain possible. > But using a source 6to4 address to reach a non-6to4 destination IS a > problem, and IMHO MUST be deprecated ASAP. I full agree with this. > 6to4 to non-6to4 being the only reason for 6to4 relay routers, and for > the 6to4 anycast address to reach them, they are what needs being > deprecated. > > I guess RFC 3484 should also be updated to say that a 6to4 address MAY > be used if both source and destination are 6to4, but ONLY in this case. The idea of 6to4 is great and it also works pretty nifty in practice. The idea of 6to4+anycast was also good, but unfortunately one gets several layers of BGP-pull and misconfiguration which are very hard to debug and thus solve, especially as one will never have access to all nodes in both IPv4 and IPv6 paths, both ways, to correctly debug it. On a controlled network that works, but on the wide internet this doesn't and only causes a lot of issues. I have to state though that there are a LOT of happy 6to4 users, but they are only accessing more or less local resources. Thus network-wise not too far away, which thus makes it a more or less controlled environment. Greets, Jeroen
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