nanog mailing list archives
Re: DNS anycast considered harmful (was: .ORG problems this evening)
From: Todd Vierling <tv () duh org>
Date: Thu, 18 Sep 2003 10:22:11 -0400 (EDT)
On Thu, 18 Sep 2003, Leo Bicknell wrote: : Number your sites from 1..N, have all odds announce one address, all : evens the other. DNS servers will still use the closest (due to RTT : checking), but will now also have a backup that does not go to the same : site in steady state, but is still very close as well. Yup. Of course, if what they really want is to bias it toward geographic closeness, more than two would be needed. One possible example: tld0.ultradns.net -> advertised by everyone tld1.ultradns.net -> advertised by odd servers tld2.ultradns.net -> advertised by even servers With the provision that tld0 shows up first in queries for the glue records (for first-pick bias). -- -- Todd Vierling <tv () duh org> <tv () pobox com>
Current thread:
- .ORG problems this evening Todd Vierling (Sep 17)
- Re: .ORG problems this evening Jared Mauch (Sep 17)
- Re: .ORG problems this evening Todd Vierling (Sep 18)
- Re: DNS anycast considered harmful (was: .ORG problems this evening) Iljitsch van Beijnum (Sep 18)
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- Re: DNS anycast considered harmful (was: .ORG problems this evening) Todd Vierling (Sep 18)
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- Re: DNS anycast considered harmful (was: .ORG problems this evening) Todd Vierling (Sep 18)
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- Re: DNS anycast considered harmful (was: .ORG problems this evening) Todd Vierling (Sep 18)
- Re: DNS anycast considered harmful (was: .ORG problems this evening) Stephen J. Wilcox (Sep 18)
- Re: DNS anycast considered harmful (was: .ORG problems this evening) Todd Vierling (Sep 18)
- Re: DNS anycast considered harmful (was: .ORG problems this evening) Leo Bicknell (Sep 18)
- Re: DNS anycast considered harmful (was: .ORG problems this evening) Todd Vierling (Sep 18)
- Re: DNS anycast considered harmful (was: .ORG problems this evening) Iljitsch van Beijnum (Sep 18)
- RE: DNS anycast considered harmful (was: .ORG problems this evening) David Schwartz (Sep 18)
- Re: .ORG problems this evening Todd Vierling (Sep 18)
- yo' grammar so funny (was Re: DNS anycast considered harmful) Todd Vierling (Sep 18)
- Re: .ORG problems this evening Jared Mauch (Sep 17)
- Re: DNS anycast considered harmful (was: .ORG problems this evening) Stephen J. Wilcox (Sep 18)
- Re: .ORG problems this evening Stephen J. Wilcox (Sep 18)
- Re: .ORG problems this evening Todd Vierling (Sep 18)
- Re: .ORG problems this evening Rodney Joffe (Sep 18)
- Re: .ORG problems this evening Christopher L. Morrow (Sep 17)