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Re: dual-stack IP transition

2008-04-01 11:51:30

John Leslie wrote:
   Minimizing the change _does_ tend to ease implementation...

and particularly should not make any changes to its registration model.

   That really doesn't follow.

   In particular, there are a number of possible gateway-like options
for communication between an IPv4-only host and an IPv6-only host.
It might be _very_ helpful to register preferences on which to use.

The registration model is not about v4 vs. v6. It is about use of A (or AAAA) vs. MX in order to find an SMTP receiving host.

And the problems with requiring MX registration, in order to receive mail, have now been well documented over the last few days.



  Dave Crocker
  Brandenburg InternetWorking

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