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Re: Anycast 101

  • From: Joe Abley
  • Date: Fri Dec 17 12:55:16 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