Round robin on CNAME
Nate Campi
nate at campin.net
Mon Apr 1 19:02:10 UTC 2002
On Sun, Mar 31, 2002 at 10:48:48PM -0500, William Stacey wrote:
> You mean instead of ns1.hotwired.com returning following:
> ;; ANSWER SECTION:
> www.lycos.com. 900 IN CNAME www.lycos.com.akadns.net.
>
> ;; AUTHORITY SECTION:
> . 237077 IN NS I.ROOT-SERVERS.net.
> . 237077 IN NS J.ROOT-SERVERS.net.
> <snip>
>
> it would return same CNAME RR, but instead of root Authority it would
> return?:
> ;; ANSWER SECTION:
> lycos.com.akadns.net. 88575 IN NS zc.akadns.net.
> lycos.com.akadns.net. 88575 IN NS zf.akadns.net.
> lycos.com.akadns.net. 88575 IN NS zb.akadns.net.
> ...
> ;; ADDITIONAL SECTION:
> zc.akadns.net. 103172 IN A 63.241.199.50
> zf.akadns.net. 103172 IN A 63.215.198.79
> ...
>
> How would the lycos.com zone look to achieve this? Wouldn't this involve
> out of zone data? Assuming no caching, the savings is root, net, akadns,
> com (i.e. net of 4 iterations) ?
You would get:
;; ANSWER SECTION:
www.lycos.com. 3600 IN NS a.akadns.lycos.com.
;; ADDITIONAL SECTION:
a.akadns.lycos.com. 3600 IN A 63.241.199.50
Now remote resolvers can go straight to 63.241.199.50 (and whatever
other nameservers have the delegation done to) and ask for
www.lycos.com.
--
Nate
"Whom computers would destroy, they must first drive mad." -Anon.
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