Re: [DNSOP] abandoning ANAME and standardizing CNAME at apex
Mark Andrews <marka@isc.org> Tue, 19 June 2018 23:00 UTC
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From: Mark Andrews <marka@isc.org>
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Date: Wed, 20 Jun 2018 09:00:07 +1000
Cc: Ray Bellis <ray@bellis.me.uk>, dnsop@ietf.org
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References: <b73f3dc7-b378-d5d8-c7a2-42bc4326fbae@nic.cz> <alpine.DEB.2.11.1806191428250.916@grey.csi.cam.ac.uk> <691FC45D-E5B6-4131-95BF-878520351F3A@gmail.com> <bf0ba568-1a18-f8cf-c1a0-3f547d642a78@bellis.me.uk> <0438207E-A4C2-434D-9507-9D9F54765CFB@puck.nether.net> <alpine.DEB.2.11.1806191649350.916@grey.csi.cam.ac.uk> <9a0d1bae-dc58-99b5-40d1-caa7737dbfb1@bellis.me.uk> <6213286F-10EB-400F-8333-3591C7A7B78B@virtualized.org>
To: David Conrad <drc@virtualized.org>
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Subject: Re: [DNSOP] abandoning ANAME and standardizing CNAME at apex
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> On 20 Jun 2018, at 8:44 am, David Conrad <drc@virtualized.org> wrote: > > On Jun 19, 2018, at 2:03 PM, Ray Bellis <ray@bellis.me.uk> wrote: >> AIUI, a large part of the supposed issue with SRV was the inertia of the >> installed base of browsers that wouldn't know how to access them. > > I thought the more fundamental problem was the additional latency caused by the second lookup since SRV specified domain names as targets. Yes, they keep coming up with theoretical issues which won’t be a issue in practice. Nameservers put the address records of the server listed in the SRV record in the additional section so no second lookup is required. If the address isn’t in the cache the nameserver can look it up while the SRV reply is in flight. I’ve got code that does exactly that. Took 30 minutes to write. It’s just a different form of prefetch. If they really want the additional section populated they can define a EDNS option or flag to say to do that. At the moment most servers don’t follow CNAMEs when populating the additional section but that can also be done easily. So one SRV query with all the rest of the data in the additional section. Perfectly doable. Fallback to 2 queries with older name servers and a CNAME chain for the SRV target. > But maybe I’m misremembering. > > Regads, > -drc > > _______________________________________________ > DNSOP mailing list > DNSOP@ietf.org > https://www.ietf.org/mailman/listinfo/dnsop -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… Joe Abley
- Re: [DNSOP] faux BNAME, was abandoning ANAME and … John Levine
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… John Levine
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ray Bellis
- Re: [DNSOP] abandoning ANAME and standardizing CN… Jan Včelák
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Ebersman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… David Conrad
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ray Bellis
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ondřej Surý
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Wouters
- Re: [DNSOP] abandoning ANAME and standardizing CN… Matthew Pounsett
- Re: [DNSOP] abandoning ANAME and standardizing CN… Joe Abley
- Re: [DNSOP] abandoning ANAME and standardizing CN… John Levine
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Colm MacCárthaigh
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Anthony Eden
- Re: [DNSOP] abandoning ANAME and standardizing CN… Erik Nygren
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ray Bellis
- Re: [DNSOP] abandoning ANAME and standardizing CN… Jared Mauch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Wouters
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ray Bellis
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Joe Abley
- Re: [DNSOP] abandoning ANAME and standardizing CN… Lanlan Pan
- Re: [DNSOP] abandoning ANAME and standardizing CN… tjw ietf
- Re: [DNSOP] abandoning ANAME and standardizing CN… Colm MacCárthaigh
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- [DNSOP] abandoning ANAME and standardizing CNAME … Petr Špaček
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ray Bellis
- Re: [DNSOP] abandoning ANAME and standardizing CN… Viktor Dukhovni
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… Joe Abley
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Shumon Huque
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Joe Abley
- Re: [DNSOP] abandoning ANAME and standardizing CN… Viktor Dukhovni
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… 神明達哉
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Shumon Huque
- Re: [DNSOP] abandoning ANAME and standardizing CN… Warren Kumari
- Re: [DNSOP] abandoning ANAME and standardizing CN… John R Levine
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… Lanlan Pan
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… John R Levine
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… Warren Kumari
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman
- Re: [DNSOP] Creating a query/record for A and AAAA Paul Vixie
- Re: [DNSOP] Creating a query/record for A and AAAA Michael Sheldon
- Re: [DNSOP] Creating a query/record for A and AAAA Paul Vixie
- [DNSOP] Creating a query/record for A and AAAA Michael Sheldon
- Re: [DNSOP] Creating a query/record for A and AAAA Paul Wouters
- Re: [DNSOP] Creating a query/record for A and AAAA Mark Andrews
- Re: [DNSOP] Creating a query/record for A and AAAA Tony Finch
- Re: [DNSOP] Creating a query/record for A and AAAA Ondřej Surý
- Re: [DNSOP] Creating a query/record for A and AAAA Jared Mauch
- Re: [DNSOP] Creating a query/record for A and AAAA Paul Wouters
- Re: [DNSOP] Creating a query/record for A and AAAA Ray Bellis
- Re: [DNSOP] Creating a query/record for A and AAAA Ray Bellis
- Re: [DNSOP] Creating a query/record for A and AAAA Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tim Wicinski
- Re: [DNSOP] abandoning ANAME and standardizing CN… Brian Dickson
- Re: [DNSOP] abandoning ANAME and standardizing CN… Tony Finch
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Hoffman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Matthijs Mekking
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Paul Vixie
- Re: [DNSOP] abandoning ANAME and standardizing CN… Dan York
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… Stephane Bortzmeyer
- Re: [DNSOP] abandoning ANAME and standardizing CN… Stephane Bortzmeyer
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ray Bellis
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Ray Bellis
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Petr Špaček
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Evan Hunt
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… JW
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… Petr Špaček
- Re: [DNSOP] abandoning ANAME and standardizing CN… Stephane Bortzmeyer
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mark Andrews
- Re: [DNSOP] abandoning ANAME and standardizing CN… Petr Špaček
- Re: [DNSOP] abandoning ANAME and standardizing CN… Mukund Sivaraman