[dnsop] DNS Anycast revisited (fwd)

Wed May 4 15:22:50 UTC 2005

nsuan at 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 at 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 at 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