Hi, That's what I want to discuss about. The paper gives a very detailed explanation on anycast with OSPF_ecmp, and what I want to know is:
is there anything not included in it but must be considered carefully when anycast cache server farm is to be established in MAN ? Will there be any problem with OSPF-ECMP convergence ? is there any request with DNS software(BIND, CNS, powerdns etc. ) selection? Considering such a situation, a big ISP want to set up hierachical cache DNS service, it has several MAN interconnected by backbone. each MAN uses a reserved ASN. The backbone has a public ASN and connect to each MAN with e-BGP. Should BGP multipath be considered ? or should each MAN announce same DNS server address block in each e-bgp session ? will there be any possible problem in such situation? what I do care about is, convergence speed, reliablity, load balancing within cache server farm, or load sharing between different cache server farm when one of them failed, cost of administration. Joe > > 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 > > > __________________________________________________ Do You Yahoo!? Log on to Messenger with your mobile phone! http://sg.messenger.yahoo.com