[dns-operations] Unexpected behaviour from the B root servers?

[Paul Vixie]

> Feb 26 09:59:50 Mail named[38107]: checkhints: view mail_recursive: \
> 	b.root-servers.net/A (192.228.79.201) missing from hints
> Feb 26 09:59:50 Mail named[38107]: checkhints: view mail_recursive: \
> 	b.root-servers.net/A (128.9.0.107) extra record in hints 

if it's load balancing and/or anycast, then not every priming query sent to
"B" is going to be answered by the same server.  does anyone have a tcpdump
showing a response to a priming query that has this other address for B?

> here's some followup from the bind-users mailing list about it.

and here's yet more of the same, also from bind-users:

> From: "Stephen John Smoogen" <smooge at gmail.com>
> Date: Mon, 26 Feb 2007 10:43:44 -0700
> 
> I ran a tcpdump overnight to see when it was occuring and it seems to
> occur every 10-30 queries. So my guess is that Peter Bambier's comment
> about a load-balancer on the B side may be the issue. Looking at the
> full packet capture the packets I am getting from 200,202,203 are all
> the same as the ones I get from 201.
> 
> Hope you are having a good summer.
> Stephen