North American Network Operators Group

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Re: How to tell if something is anycasted?

  • From: Joe Abley
  • Date: Wed May 17 16:34:26 2006

On 17-May-2006, at 10:45, [email protected] wrote:

well Peter, ONE root server operator has that practice.  Others
have different practices regarding anycast.
Actually, it looks to me like all thirteen root servers answer "HOSTNAME.BIND CHAOS TXT" queries (J might check for trailing dots, maybe ;-) and also that F and C share a strikingly similar naming scheme.

[octopus:~]% for n in a b c d e f g h i j k l m; do
for> echo -n "trying ${n}... "
for> dig @${n} hostname.bind chaos txt +short
for> done
trying a... "ns6-aroot"
trying b... "b3"
trying c... ""
trying d... ""
trying e... ""
trying f... ""
trying g... ""
trying h... "H1"
trying i... "s1.was"
trying j... ""
trying k... "k2.nap"
trying l... ""
trying m... "M-SFO-1"