[76616] in North American Network Operators' Group
Re: Anycast 101
daemon@ATHENA.MIT.EDU (Joe Abley)
Fri Dec 17 12:54:25 2004
In-Reply-To: <7FD53B97-501F-11D9-B673-000A95CD987A@muada.com>
Cc: NANGO <nanog@merit.edu>, Joe Shen <joe_hznm@yahoo.com.sg>
From: Joe Abley <jabley@isc.org>
Date: Fri, 17 Dec 2004 12:53:26 -0500
To: Iljitsch van Beijnum <iljitsch@muada.com>
Errors-To: owner-nanog-outgoing@merit.edu
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
