We actively sought reciprocal secondaries, and offered and received reciprocal query hosts, from other regional ISPs when I was CTO @ ADN. We saw it as "strengthening the regional Internet". So our users used CTSnet as their tertiary NS, and CTSNet used ours, FE. Of course, not CTS/CARI and ADN are all AIS, so the point is moot.
-----Original Message----- From: Frank Bulk [mailto:frnkblk@iname.com] Sent: Tuesday, February 16, 2010 7:25 PM To: 'Joe Abley' Cc: nanog@nanog.org Subject: RE: History of 4.2.2.2. What's the story?
We do. It's at our upstream provider, just in case we had an upstream connectivity issue or some internal meltdown that prevented those in the outside world to hit our (authoritative) DNS servers. Of course, that's most helpful for DNS records that resolve to IPs *outside* our network.
Frank
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For what it's worth, I have never heard of an ISP, big or small, deciding to place resolvers used by their customers in someone else's network. Perhaps I just need to get out more.
Joe