[75579] in North American Network Operators' Group
Re: anycast stability experiment
daemon@ATHENA.MIT.EDU (Daniel Karrenberg)
Wed Nov 17 05:16:32 2004
Date: Wed, 17 Nov 2004 11:15:52 +0100
From: Daniel Karrenberg <daniel.karrenberg@ripe.net>
To: Randy Bush <randy@psg.com>
Cc: ops sheep willing to be censored by a non-op <nanog@nanog.org>,
apops@apops.net, sig-routing@apnic.net, routing-wg@ripe.net,
afnog@afnog.org
Mail-Followup-To: Randy Bush <randy@psg.com>,
ops sheep willing to be censored by a non-op <nanog@nanog.org>,
apops@apops.net, sig-routing@apnic.net, routing-wg@ripe.net,
afnog@afnog.org
In-Reply-To: <16794.39682.83318.480527@ran.psg.com>
Errors-To: owner-nanog-outgoing@merit.edu
The RIPE NCC dnsmon (http://dnsmon.ripe.net) has collected such data for
all root servers from dozens of places for about two years already. You
are welcome to the raw data. NB: The further back in time the more work
it will be for us to dig out raw data.
Differences to your set-up:
- most probes are not near the "edges" of the net, for most definitions of "edge"
- probing times are properly randomised
- the mean probing interval is 60s
- UDP only
[Continuous but not scientifically rigorous examination of the data
shows that your bet is a pretty safe one. In other words: for practical
purposes routing is stable at all proble locations. So the data is
in fact pretty boring. If it weren't as boring, k.root-servers.net
would not be anycast the way it is.]
Daniel
