On Mar 17 2010, sth...@nethelp.no wrote:
A small followup:
So it looks like the IPv4 instance refuses TCP, while the IPv6 instance
handles it okay. No filters in the way at my end. The m.root-servers.net
instance looks like it is in Paris or thereabouts - but there is quite
a bit of difference between the instances: IPv4 (highly variable ping,
RTT 700 ms or more) and IPv6 (ping steady at RTT 44-45 ms).
Should of course have checked hostname.bind, which reveals:
% dig @202.12.27.33 hostname.bind ch txt +short
"M-CDG-3"
% dig @2001:dc3::35 hostname.bind ch txt +short
"M-CDG-4"
So it seems my guess of Paris or thereabouts wasn't too far off. And
M-CDG-3 seems to have problems with TCP.
That would explain why I don't see the effect at all. I am getting
M-NRT-JPIX-3 for IPv4 and M-CDG-4 for IPv6 (over either UDP or TCP).
--
Chris Thompson University of Cambridge Computing Service,
Email: c...@ucs.cam.ac.uk New Museums Site, Cambridge CB2 3QH,
Phone: +44 1223 334715 United Kingdom.
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