[80592] in North American Network Operators' Group
Re: [dnsop] DNS Anycast revisited (fwd)
daemon@ATHENA.MIT.EDU (Paul Vixie)
Wed May 4 11:23:16 2005
To: nanog@merit.edu
From: Paul Vixie <vixie@vix.com>
Date: 04 May 2005 15:22:50 +0000
In-Reply-To: <42783364.2050905@nonexiste.net>
Errors-To: owner-nanog@merit.edu
nsuan@nonexiste.net (Nicholas Suan) writes:
> In the previous paragraph Vixie said:
>
> > while i'm on the subject, i also remain convinced that using anycast to
> > do distributed load balancing for applications like WWW, on the
> > assumption that the path you heard a dns query on is instructive as to
> > what content would be best to answer with, is silly, and will more
> > often do harm or do nothing than do good. (and i've told akamai and
> > speedera this many times.) ("but it makes for great marketing
> > slideware.")
>
> In other words this is a bad idea:
>
> [FT@fenrir FT]$ dig a248.e.akamai.net @69.45.79.10
>
> ;; ANSWER SECTION:
> a248.e.akamai.net. 20 IN A 80.67.72.214
> a248.e.akamai.net. 20 IN A 80.67.72.201
>
> FT@inuyasha:~$ dig a248.e.akamai.net @69.45.79.10
>
> ;; ANSWER SECTION:
> a248.e.akamai.net. 20 IN A 69.45.79.15
> a248.e.akamai.net. 20 IN A 69.45.79.16
>
> While I'm not a mind reader, It seems he's saying that, since Ultradns
> doesn't use anycast to do this, it is an example of 'good anycast.'
yes. i thought that was clear. oops.
(why is this all happening on nanog@ rather than dnsop@?)
--
Paul Vixie
