Re: New Version Notification for draft-leiba-rfc2119-update-00.txt
Mark Andrews <marka@isc.org> Tue, 09 August 2016 23:59 UTC
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To: John Levine <johnl@taugh.com>
From: Mark Andrews <marka@isc.org>
References: <20160809232819.1291.qmail@ary.lan>
Subject: Re: New Version Notification for draft-leiba-rfc2119-update-00.txt
In-reply-to: Your message of "09 Aug 2016 23:28:19 +0000." <20160809232819.1291.qmail@ary.lan>
Date: Wed, 10 Aug 2016 09:58:53 +1000
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In message <20160809232819.1291.qmail@ary.lan>, "John Levine" writes: > >Obviously, taste and correctness matter. > >It still won't be a good idea to say "The reserved bit must be zero on > >send and must be ignored on receive," arguing "Well, we don't want to > >use MUST because some implementations don't do that so it can't be > >normative." > > I'd write "The reserved bit is set to zero on send and is ignored on > receive" and save the command terms for things where one might think > that there was a reason to do something else. RFC2671/RFC6891 has Z Set to zero by senders and ignored by receivers, unless modified in a subsequent specification. which resulted in 2% of deployed nameservers just copying reserved bits to the reply or 3% of nameservers not answering because a reserved bit is set. https://ednscomp.isc.org/compliance/ts/alexa.flagsfail.html A bit more emphasis may have changed the result. At least the TLD servers no longer copy the reserved bits. The last server doing that was just upgraded a week or so ago. https://ednscomp.isc.org/compliance/ts/tld.flagsfail.html Mark > >The point of lower case keywords shouldn't be to allow people to be > >sloppy and to avoid normative text to make a false consensus easier. > >This SHOULD be about writing clearer RFCs and not having to contort > >language when should and must are perfectly good non-normative things to > >say. > > Yup. > > R's, > John > -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org
- Re: New Version Notification for draft-leiba-rfc2… John C Klensin
- Re: New Version Notification for draft-leiba-rfc2… John R Levine
- Re: New Version Notification for draft-leiba-rfc2… Dave Crocker
- Re: New Version Notification for draft-leiba-rfc2… John Levine
- Re: New Version Notification for draft-leiba-rfc2… Randall Gellens (IETF)
- Re: New Version Notification for draft-leiba-rfc2… Joe Touch
- Re: New Version Notification for draft-leiba-rfc2… Gmail
- Re: New Version Notification for draft-leiba-rfc2… Brian E Carpenter
- Re: New Version Notification for draft-leiba-rfc2… John C Klensin
- Re: New Version Notification for draft-leiba-rfc2… Dave Crocker
- Re: New Version Notification for draft-leiba-rfc2… Pete Resnick
- Re: New Version Notification for draft-leiba-rfc2… Joe Touch
- Re: New Version Notification for draft-leiba-rfc2… Dave Crocker
- Re: New Version Notification for draft-leiba-rfc2… Pete Resnick
- Re: New Version Notification for draft-leiba-rfc2… Julian Reschke
- Re: New Version Notification for draft-leiba-rfc2… Michael Richardson
- Re: New Version Notification for draft-leiba-rfc2… Julian Reschke
- Re: New Version Notification for draft-leiba-rfc2… Ted Lemon
- Re: New Version Notification for draft-leiba-rfc2… Ben Campbell
- Re: New Version Notification for draft-leiba-rfc2… HANSEN, TONY L
- RE: New Version Notification for draft-leiba-rfc2… John C Klensin
- Re: New Version Notification for draft-leiba-rfc2… Barry Leiba
- RE: New Version Notification for draft-leiba-rfc2… Dearlove, Christopher (UK)
- Re: New Version Notification for draft-leiba-rfc2… Ted Lemon
- Re: New Version Notification for draft-leiba-rfc2… Stewart Bryant
- RE: New Version Notification for draft-leiba-rfc2… Dearlove, Christopher (UK)
- Re: New Version Notification for draft-leiba-rfc2… John C Klensin
- Re: New Version Notification for draft-leiba-rfc2… John C Klensin
- Re: New Version Notification for draft-leiba-rfc2… Dave Crocker
- Re: New Version Notification for draft-leiba-rfc2… John C Klensin
- Re: New Version Notification for draft-leiba-rfc2… Michael Richardson
- Re: New Version Notification for draft-leiba-rfc2… Barry Leiba
- Re: New Version Notification for draft-leiba-rfc2… Doug Ewell
- Re: New Version Notification for draft-leiba-rfc2… Dave Cridland
- Re: New Version Notification for draft-leiba-rfc2… Barry Leiba
- Re: New Version Notification for draft-leiba-rfc2… Time Warner Cable
- Re: New Version Notification for draft-leiba-rfc2… Michael Richardson
- Re: New Version Notification for draft-leiba-rfc2… Barry Leiba
- Re: New Version Notification for draft-leiba-rfc2… Michael Richardson
- Re: New Version Notification for draft-leiba-rfc2… Ted Lemon
- Re: New Version Notification for draft-leiba-rfc2… Ted Lemon
- Re: New Version Notification for draft-leiba-rfc2… John Leslie
- Re: New Version Notification for draft-leiba-rfc2… Ted Lemon
- Re: New Version Notification for draft-leiba-rfc2… Stewart Bryant
- Re: New Version Notification for draft-leiba-rfc2… Stewart Bryant
- Re: New Version Notification for draft-leiba-rfc2… Stewart Bryant
- Re: New Version Notification for draft-leiba-rfc2… Stewart Bryant
- Re: New Version Notification for draft-leiba-rfc2… Randy Bush
- Re: New Version Notification for draft-leiba-rfc2… Dave Crocker
- Re: New Version Notification for draft-leiba-rfc2… Michael Richardson
- Re: New Version Notification for draft-leiba-rfc2… Mark Andrews
- Re: New Version Notification for draft-leiba-rfc2… John R Levine
- Re: New Version Notification for draft-leiba-rfc2… Mark Andrews
- Re: New Version Notification for draft-leiba-rfc2… John Levine
- Re: New Version Notification for draft-leiba-rfc2… Scott O. Bradner
- Re: New Version Notification for draft-leiba-rfc2… Joe Touch
- Re: New Version Notification for draft-leiba-rfc2… Sam Hartman
- Re: New Version Notification for draft-leiba-rfc2… Dave Crocker
- Re: New Version Notification for draft-leiba-rfc2… Sam Hartman
- Re: New Version Notification for draft-leiba-rfc2… Barry Leiba
- Re: New Version Notification for draft-leiba-rfc2… Stephan Wenger
- Re: New Version Notification for draft-leiba-rfc2… Barry Leiba
- Re: New Version Notification for draft-leiba-rfc2… Ted Hardie
- Re: New Version Notification for draft-leiba-rfc2… Paul Hoffman