[multipathtcp] (re-)charter discussion (RE: draft-boucadair-mptcp-plain-mode-07)
<mohamed.boucadair@orange.com> Thu, 09 June 2016 09:15 UTC
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From: mohamed.boucadair@orange.com
To: "philip.eardley@bt.com" <philip.eardley@bt.com>, "sarikaya@ieee.org" <sarikaya@ieee.org>, "multipathtcp@ietf.org" <multipathtcp@ietf.org>
Thread-Topic: (re-)charter discussion (RE: [multipathtcp] draft-boucadair-mptcp-plain-mode-07)
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Date: Thu, 09 Jun 2016 09:15:11 +0000
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Subject: [multipathtcp] (re-)charter discussion (RE: draft-boucadair-mptcp-plain-mode-07)
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Hi Phil, A proxy is always single-ended: that is, it transforms an MPTCP connection into an TCP connection, and vice versa. Does it really matter if the MPTCP peer is a CPE or a host directly connected to an operator network? IMHO, the key word in the charter is "helping MPTCP's incremental deployment" which is a goal of the plain mode specification. I do agree that the UDP part of the discussion is not covered by the charter. Is there any chance to initiate the re-chartering discussion prior to the meeting? Thank you. Cheers, Med > -----Message d'origine----- > De : multipathtcp [mailto:multipathtcp-bounces@ietf.org] De la part de > philip.eardley@bt.com > Envoyé : mercredi 8 juin 2016 11:54 > À : sarikaya@ieee.org; multipathtcp@ietf.org > Objet : Re: [multipathtcp] draft-boucadair-mptcp-plain-mode-07 > > I believe you're right that such work would be outside the charter. > > We're hoping (if we get 2 sessions) in Berlin to have some discussion > about potential re-chartering. In practice we haven't managed to get much > work focussed specifically on meeting the current charter item on proxy > (there was some individual drafts a while back) - but there seems to be > quite a bit of industry work on proxies (beyond charter's single-ended > proxy). So potential discussion topic > > >From my perspective there seems to be some operator interest in hybrid. > See for instance the discussions in banana bar-bofs we've had at last > couple of ietfs - including description of the DT deployment. (note, not > all hybrid solutions use mptcp) > > Best wishes > phil > > -----Original Message----- > From: multipathtcp [mailto:multipathtcp-bounces@ietf.org] On Behalf Of > Behcet Sarikaya > Sent: 01 June 2016 19:38 > To: multipathtcp@ietf.org > Subject: [multipathtcp] draft-boucadair-mptcp-plain-mode-07 > > Hi all, > > Recent mails in this thread came to my attention because I work on the > hybrid access network issues and wish to convey my views on some of the > issues discussed. > > First of all, the claims that there is strong operator interest on this is > over blown. Hybrid access is based on offloading some CPE traffic to > 3G/LTE network, I don't think mobile operators are fond of such a thing. > > Also I strongly concur with Yoshi's point of CPE to convert UDP or TCP > into MPTCP and requires Concentrators to convert back MPTCP into UDP or > TCP is a complex process. The crux of this is the problems arising from > the use of MPTCP for tunneling, which is what this draft is advocating. > > Here I recommend Joe Touch's Intarea draft > https://tools.ietf.org/id/draft-ietf-intarea-tunnels-02.txt > on IP Tunnels in the Internet Architecture. IETF developed many tunneling > protocols which are surveyed in this draft but none of them are TCP/MPTCP > based. > I also question suitability of this work to the charter. There is this > charter text: > Finally, the working group will explore whether an MPTCP-aware > middlebox would be useful, where at least one end host is MPTCP-enabled. > For example, potentially helping MPTCP's incremental deployment by > allowing only one end host to be MPTCP-enabled and the middlebox acts as > an MPTCP proxy for the other end host, which runs TCP; and potentially > helping some mobility scenarios, where the middlebox acts as an anchor > between two MPTCP-enabled hosts. The working group will detail what real > problems an MPTCP-enabled middlebox might solve, how it would impact the > Multipath TCP architecture (RFC6182), what proxy approach might be > justified as compared against alternative solutions to the problems, and > the likely feasibility of solving the technical and security issues. > > This draft has a middlebox called Concentrator but it is not trying to > enable MPTCP hosts to communicate with TCP hosts, it is just tunneling the > traffic. So there is no charter item that fits to this draft. > I strongly suggest staying away from making MPTCP a tunneling protocol. > > Regards, > > Behcet > > _______________________________________________ > multipathtcp mailing list > multipathtcp@ietf.org > https://www.ietf.org/mailman/listinfo/multipathtcp > > _______________________________________________ > multipathtcp mailing list > multipathtcp@ietf.org > https://www.ietf.org/mailman/listinfo/multipathtcp
- [multipathtcp] (re-)charter discussion (RE: draft… mohamed.boucadair