Anycast 101

Fri Dec 17 17:53:26 UTC 2004

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