Re: Anycast 101

[Joe Abley <jabley () isc org>]

On 17 Dec 2004, at 06:33, Iljitsch van Beijnum wrote:

> On 17-dec-04, at 11:23, Joe Shen wrote:
>
> > is there any problem or anything must be taken
> > care about when anycast is employed within a DNS
> > server farm within MAN?
>
> > What I mean is, if we want to employ anycast in a
> > cache server farm which is located within a big OSPF
> > network, is there anything problemetic ? or should we
> > consider anycast only when root server is to be
> > installed ?
>
> Since OSPF generally converges orders of magnitude faster and it's 
> easier to get OSPF to select the highest bandwidth/lowest latency path 
> than BGP, this should be easier.

Also, be mindful of ECMP.

  http://www.isc.org/pubs/tn/isc-tn-2004-1.html
  http://www.isc.org/pubs/tn/isc-tn-2004-1.txt


Joe