Re: [tcpm] Early assignment of IANA TCP option number for AccECN
Michael Tuexen <michael.tuexen@lurchi.franken.de> Mon, 25 July 2022 14:04 UTC
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From: Michael Tuexen <michael.tuexen@lurchi.franken.de>
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Date: Mon, 25 Jul 2022 16:02:30 +0200
Cc: Mirja Kuehlewind <mirja.kuehlewind=40ericsson.com@dmarc.ietf.org>, Bob Briscoe <ietf@bobbriscoe.net>, tcpm IETF list <tcpm@ietf.org>
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References: <5fd201f8-5457-3184-302d-c2f653564647@bobbriscoe.net> <9944A719-2FAF-4138-B1A3-4180454FD030@ericsson.com> <899a549f-fc82-a484-1043-28a151ae138d@bobbriscoe.net> <6032F422-60DE-4AC5-A291-E9A731032FED@ericsson.com> <87bd3248-312b-3d1b-8ba9-d4e3c1cfb1d8@gmx.at>
To: "Scheffenegger, Richard" <rs.ietf@gmx.at>
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Subject: Re: [tcpm] Early assignment of IANA TCP option number for AccECN
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> On 25. Jul 2022, at 15:52, Scheffenegger, Richard <rs.ietf@gmx.at> wrote: > > > Hi, > > As one of the authors of the AccECN draft, which approaches the final > stages, I wanted to see if there is support to ask IANA for an early > assignment of the two TCP Option numbers for AccECN. > > The background here is, that the current use of the experimental option > in Linux (0xACC0 and 0xACC1) is not really documented - the draft only > mentiones the experimental ID 0xACCE which was in use prior of the > decision to go with two distinct option numbers. If I understand the experimental options correctly, you could just use kind=253, ExID=0xACCE kind=254, ExID=0xACCE to distinguish your two option using the assignment already made (for example the kind=253 for Order 0, kind=254 for Order 1). I don't see the ones used by Linux under https://www.iana.org/assignments/tcp-parameters/tcp-parameters.xhtml#tcp-exids > > However, the implementations between Linux and FreeBSD deviated - Linux > using two different experimental IDs (see above), while the FreeBSD > variant differentiated by an additional byte after the experiment ID > (0xACCE). I think the draft should describe how to use the experimental options. Best regards Michael (as an individual) > > As some alignment here is needed in the code anyway, maybe this can make > use of the IANA assigned, final option numbers right away. > > This showed up as one point during the Hackathon L3S interoperability > testing. > > If the group generally agrees, I would want to ask the chairs to support > this request on behalf of the authors at IANA. > > Also, I would like to suggest the assignment of 0xAC (172) and 0xAE > (174) for use with the AccECN tcp option (ACcurate ecn, and Accurate > Ecn) - but I admit that there is no other reason than vanity for these > specific numbers. > > Best regards, > Richard > > _______________________________________________ > tcpm mailing list > tcpm@ietf.org > https://www.ietf.org/mailman/listinfo/tcpm
- [tcpm] Partial implementation of AccECN Option lo… Bob Briscoe
- Re: [tcpm] Partial implementation of AccECN Optio… Mirja Kuehlewind
- Re: [tcpm] Partial implementation of AccECN Optio… Bob Briscoe
- Re: [tcpm] Partial implementation of AccECN Optio… Mirja Kuehlewind
- [tcpm] Early assignment of IANA TCP option number… Scheffenegger, Richard
- Re: [tcpm] Early assignment of IANA TCP option nu… Michael Tuexen
- Re: [tcpm] Early assignment of IANA TCP option nu… Scheffenegger, Richard
- Re: [tcpm] Early assignment of IANA TCP option nu… Bob Briscoe
- Re: [tcpm] Early assignment of IANA TCP option nu… Joe Touch
- Re: [tcpm] Early assignment of IANA TCP option nu… Michael Tuexen
- Re: [tcpm] Early assignment of IANA TCP option nu… Michael Tuexen
- Re: [tcpm] Early assignment of IANA TCP option nu… Bob Briscoe
- Re: [tcpm] Early assignment of IANA TCP option nu… Michael Tuexen
- Re: [tcpm] Early assignment of IANA TCP option nu… Scheffenegger, Richard
- Re: [tcpm] Early assignment of IANA TCP option nu… Michael Tuexen
- [tcpm] Issue with multiple option code points: Re… touch@strayalpha.com
- Re: [tcpm] Issue with multiple option code points… Scheffenegger, Richard
- Re: [tcpm] Issue with multiple option code points… touch@strayalpha.com