Preferred method of advertizing a dual-stack mx server
Scott Prader
gnea@garson.org
Tue, 14 May 2002 22:37:41 -0400
* Patrice Fournier (pfournier@loups.net) cobbled forth:
> Hi all,
>
> setup such as (and would that be the preferred setup considering that the
> first one showed causes problems?):
> example.net. IN MX 0 mail.ipv4.example.com.
> example.net. IN MX 0 mail.ipv6.example.com.
You may want to try changing the MX handlers to the following:
example.net. IN MX 10 mail.ipv6.example.com.
example.net IN MX 20 mail.ipv4.example.com.
This will simply try to deliver mail to the ipv6-capable host first,
then fall back on the ipv4 host. The reasoning is that by using the
same priorities will generally cause a round-robin situation, in which
the mail and dns servers won't care which host it goes to, but with a
defined priority schedule if the first host doesn't work it will fall
back to the other host by default instead of becoming confused. HTH
.oO Gnea [gnea at garson dot org] Oo.
.oO url [http://gnea.net] Oo.
"You can tune a filesystem, but you can't tune a fish." -Kirk McKusick