Re: [dnsext] draft-ah-dnsext-rfc1995bis-ixfr-03 -- questions on s3.2.3
Matthijs Mekking <matthijs@nlnetlabs.nl> Thu, 05 April 2012 07:41 UTC
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Date: Thu, 05 Apr 2012 09:41:24 +0200
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Subject: Re: [dnsext] draft-ah-dnsext-rfc1995bis-ixfr-03 -- questions on s3.2.3
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, On 03/09/2012 08:00 PM, Alfred � wrote: > Folks -- in particular implementers, > > A point has been raised, and for qualified action, the draft authors > need more information and opinions on this part of the draft: > > |3.2. IXFR Response > | > |[...] > | > |3.2.3. Answer Section > | > | The Answer section MUST be populated with the zone change information > | or, in the case of fallback to AXFR, the full zone contents. > | > | For multi-message IXFR responses, the conceptional answer is split > | into segments that are sent in order. Each segment is comprised of > |> an integer number of full RRs, and for transport efficiency, the > |> response messages should be filled up with answer RRs as much as > ^^^^^^ > |> possible for the response message size chosen by the IXFR server, > |> taking into account the space needed for the other sections in the > |> messages. > | > | [...] > > Questions: > > a) Does the behavior described in the emphasized sentence make > sense, given the optimisation goals underlying the IXFR design ? I can see why filling up the response as much as possible is more efficient with respect to transport (chance that lesser packets will be needed). To me it makes sense. > b) Do existing implementations follow this direction ? We don't have an IXFR server implementation (yet), but for what its worth: NSD handles this approach for AXFR. OpenDNSSEC will be able to server signed XFRs in version 1.4 and up and it follows this direction for both IXFR and AXFR. > c) Shall we replace the tagged "should" by a "SHOULD", > to make the recommendation even stronger ? I don't have a strong opinion about this, so I am guided by RFC2119 that says use these terms with care and sparingly. My feeling is that lowercase should is fine here. Best regards, Matthijs > > > Kind regards, > Alfred. > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPfUykAAoJEA8yVCPsQCW5WvQIAKzYSIZmm7AOXEk1t8LwvLuo rIvUPq6s5YfiaTjyiuR247Vb6h5MEcZIB/ErttIFxi3gEqIetAGcV9k840qFH3F2 JvLiptmJlR9veg0YKrL2rmULaJ2pmaii1qWO+LfRsuA37SnTezd/h91SP3MAxHFi L4h4bwluX6dAEDSSXFjyZkOD9/kn/W+nWMvJWqb8Hb90SYQV10IkjpmHoQgQeYdH AL/wULQ0hhTfUcbyw6IesY1YlN+1Oh1hGjBSy5bfM1wU+ViFg27uBOEDMKQOVbqH sQWlXINpwxP4kBpkPB4YilzVdY0JwM1k5ZqknkShCZJhmwNAov8edt5noc4/8n0= =nfGh -----END PGP SIGNATURE----- _______________________________________________ dnsext mailing list dnsext@ietf.org https://www.ietf.org/mailman/listinfo/dnsext
- [dnsext] draft-ah-dnsext-rfc1995bis-ixfr-03 -- qu… Alfred Hönes
- Re: [dnsext] draft-ah-dnsext-rfc1995bis-ixfr-03 -… Matthijs Mekking