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Re: [DNSOP] CDS polling, was Re: [Ext] Re: Clarifying referrals (#35)

Evan Hunt <each@isc.org> Mon, 13 November 2017 18:30 UTC

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Date: Mon, 13 Nov 2017 18:30:04 +0000
From: Evan Hunt <each@isc.org>
To: Tony Finch <dot@dotat.at>
Cc: Edward Lewis <edward.lewis@icann.org>, "dnsop@ietf.org" <dnsop@ietf.org>
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References: <20171112075445.tf2ut5dxzhhnqe7l@mx4.yitter.info> <20171112131831.GA32208@laperouse.bortzmeyer.org> <20171113014445.ncldrwnuuvluecx7@mx4.yitter.info> <5A08FD96.8030907@redbarn.org> <20171113020736.ga7rzgst2hurb56h@mx4.yitter.info> <5A09068A.3030206@redbarn.org> <20171113032640.tbn7icsllm6jeeny@mx4.yitter.info> <C9AC653C-9A27-4DA3-A0FA-9F1BFD429962@icann.org> <alpine.DEB.2.11.1711131456200.26046@grey.csi.cam.ac.uk>
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Subject: Re: [DNSOP] CDS polling, was Re: [Ext] Re: Clarifying referrals (#35)
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On Mon, Nov 13, 2017 at 03:19:23PM +0000, Tony Finch wrote:
> It seems to me that a reasonable in-band mechanism would be to send a
> NOTIFY to the parental agent. I can only find a little discussion of this
> idea in 2014, and it wasn't very enthusiastic - there were questions like,
> how do you know where to send the NOTIFY? On the other hand there are
> similar questions about how you would make an out-of-band request.

Mark's idea to push updates to the parent instead of relying on polling
used a SRV query to identify the correct recipient of an UPDATE:

https://tools.ietf.org/html/draft-andrews-dnsop-update-parent-zones-04

The same trick could be used to find the right NOTIFY target.

-- 
Evan Hunt -- each@isc.org
Internet Systems Consortium, Inc.

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