Re: New version of charter text
marcelo bagnulo braun <marcelo@it.uc3m.es> Wed, 26 January 2005 15:28 UTC
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From: marcelo bagnulo braun <marcelo@it.uc3m.es>
Subject: Re: New version of charter text
Date: Wed, 26 Jan 2005 16:28:45 +0100
To: Kurt Erik Lindqvist <kurtis@kurtis.pp.se>
Hi Kurtis, imho this is very good. just a few nits, questions below... El 26/01/2005, a las 13:20, Kurt Erik Lindqvist escribió: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > > All, > > please find below a new version of the charter text. And my apologies > for this taking some time. > > Some notes, > > - - I tried to address Pekka's concerns with TE, and someone in a mail > proposed an applicability document. I can't find that mail now so I am > not sure they referred to the same issue, but I would think that > documenting what uses you get from shim6 under what conditions would > address Pekka's comment. There is probably more that needs to be > documented in the same way. > > - - I included Marcelo's proposed work item on communication > establishment. > > - - I changed the reference to a state machine to John's proposed text > on > "multihoming triggers" that better referred to what I had originally > through. I read Brian as still disagreeing (and I think I do to) on > separating the statemachine from the protocol spec, but we seem to be > the only two arguing for that :-) > > - - I moved the timeline for the protocol document a bit further away > as > per Erik's comment. > > I hope that should cover most of what has been discussed. > > - - kurtis - > > - ---- > > > > Site multiHoming by IPv6 interMediation (shim6) > > Description of Working Group: > > The shim6 WG is to produce specfifications for a complete IPv6 site > multihoming solution based on the architecture developed by the IETF > multi6 WG. The multi6 WG was tasked with investigating solutions to > the site multihoming problem that will allow the global routing system > to > scale. The outcome of the multi6 WG is a specific network layer shim > architecture for addressing and address handling of sites and nodes. > This > includes switching to different locator addresses when connectivity > changes, > but without the changes of address being visible to upper layers, which > see > a fixed Upper Layer Identifier address (ULID). > > The shim6 WG is to complete this work with the required protocol > developments > and complete the architecture and security analysis of the required > protocols. > > The background documents to be considered by the WG include: > > RFC 3582 > draft-ietf-multi6-things-to-think-about-01.txt > draft-ietf-multi6-multihoming-threats-03.txt > > The input documents that the WG will use as the basis for its design > are: > > draft-huston-solution-stilltobewritten > draft-ietf-multi6-functional-dec-00.txt > draft-ietf-multi6-l3shim-00.txt [to be published shortly] > FWIW this one is already available FWIK > draft-ietf-multi6-failure-detection-00.txt [to be published shortly] > draft-ietf-multi6-hba-00.txt > draft-ietf-multi6-app-refer-00.txt > > The shim6 WG is to submit, as standards track RFCs, specifications with > enough details to allow full interoperable implementations of the shim > layer appproach to multihoming as agreed on by the multi6 WG. These > implementations should have the ability to take advantage of > multihoming without adding to the growth of the global routing table, > by using the aggregates already announced by their upstream providers. > > Since the solution requires state to be maintained at both ends of a > communication, the protocol specification docuement needs to contain a > state machine description. > > Some state transitions may result from external events however, such > as failure detection rather than from protocol events. These should be > documented in a seperate draft. > > Multihoming is today also often used to achieve various other > features, such as traffic-engineering. The Shim6 WG should document > the use of the shim6 solution in these cases in an applicability > document. > > More work items and milestones might need to be added at a later date > to > complete all implementation details needed. > > In addition to the basic network layer shim solution, the shim6 WG > is specifically chartered to do work on > > o Solutions for site exit router selection that works when each > ISP > uses ingress filtering, i.e. when the chosen site exit needs to > be > related to the source address chosen by the host. This solution > should work whether or not the peer site supports the shim6 > protocol. > > o Solutions to establish new communications after an outage has > occurred that does not requires shim support from the > non-multihomed end of the communication. The wg will explore > if such solutions are also useful when both ends support the > shim. > > o Explore how congestion control and other QoS and traffic > engineering > issues may interact with the use of multiple locators at both > ends. > > o Investigate relationship between Upper Layer Identifiers > (ULIDs) > and Unique Local Addresses. > > o ICMP error demuxing for locator failure discovery. > > o If necessary, develop and specify formats and structure for > > - Cryptographically protected locators > > - Carrying the flow label across the shim layer > defined in the multi6 architecture. > > The WG will consider whether the proposed model is exposed to > any security threats in addition to those documented in > draft-ietf-multi6-multihoming-threats-03.txt. In any case, > the specifications must specifically refer to all applicable threats > and describe how they are handled, with the requirement being that > the resulting solution not introduce any threats that make the > security any less than in today's Internet. > > The WG will not consider items outside the above scope, such as > interaction with mobility, transport level solutions, or alternative > identifier formats. However, the WG will consider developing methods > for the shim6 level to handle transport layer signalling to the shim6 > layer as in scope. > > [What other topics are explicitly in/out of scope?] what about a new shim API? I mean a new API that allows the apps to communicate with the shim and inform about failures or other stuff, would this be within scope? > > Milestones > > MAY 05 First draft of architectural document > MAY 05 First draft of protocol document > MAY 05 First draft on cryptographic locators, if required > MAY 05 First draft on multihoimg triggers description > MAY 05 First draft on applicability statement document > > SEP 05 WG last-call on architectural document > SEP 05 WG last-call on applicability statement document > > NOV 05 WG last-call on protocol document > NOV 05 WG last-call on cryptographic locators, if required > NOV 05 Submit completed architectural document to IESG > NOV 05 Submit applicability statement document to IESG > > JAN 06 WG last-call on multihoming triggers description > JAN 06 Submit document on cryptographic locators to the IESG, if > required > JAN 06 Submit protocol document to the IESG > > MAR 06 Submit draft on multihoming triggers description to the IESG > Don't we need to include the additional items that are mentioned above as milestones also, such as: ingress filtering solution, mechanism for establishing new communications with legacy hosts, TE capabilities description? Regards, marcelo > -----BEGIN PGP SIGNATURE----- > Version: PGP 8.1 > > iQA/AwUBQfeLAaarNKXTPFCVEQK8agCgl5mYm6RZ7wensMPMjXXhY3uQx0AAoOJe > eNPFzAkch34CwHSYK3TlvNsx > =4QmB > -----END PGP SIGNATURE----- > >
- Re: New version of charter text Scott W Brim
- Re: New version of charter text Kurt Erik Lindqvist
- RE: New version of charter text john.loughney
- Re: New version of charter text Erik Nordmark
- Re: New version of charter text Erik Nordmark
- Re: New version of charter text Kurt Erik Lindqvist
- Re: New version of charter text marcelo bagnulo braun
- Re: New version of charter text Brian E Carpenter
- RE: New version of charter text john.loughney
- Re: New version of charter text Erik Nordmark
- Re: New version of charter text Erik Nordmark
- Re: New version of charter text Kurt Erik Lindqvist
- Re: New version of charter text Kurt Erik Lindqvist
- Re: New version of charter text Kurt Erik Lindqvist
- Re: New version of charter text Pekka Savola
- Re: New version of charter text marcelo bagnulo braun
- New version of charter text Kurt Erik Lindqvist
- Re: New version of charter text marcelo bagnulo braun
- Re: New version of charter text Pasi Sarolahti