North American Network Operators Group
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Re: IPv6 Advertisements

  • From: Stephen Sprunk
  • Date: Thu May 31 10:47:03 2007

Thus spake "Randy Bush" <[email protected]> 
small site.  so public servers provide multiple and diverse
services.  if a hostname has a v6 address, then all services
must be v6 capable because clients do not retry the A record.

This seems to argue for having "service" hostnames, which has been standard practice at many sites for a long, long time. For instance, if you have a single box which does mail and news, and you have v6 mail but only v4 news, then mail.example.com should have both A and AAAA records but news.example.com should have A records only.

(Yes, this means you can't just CNAME the service hostname to the real hostname, but there are several other strategies.)

S

Stephen Sprunk "Those people who think they know everything
CCIE #3723 are a great annoyance to those of us who do."
K5SSS --Isaac Asimov