Re: [rtcweb] draft-ietf-rtcweb-use-cases-and-requirements-05 addition around IPv6 only and dualstack
Harald Alvestrand <harald@alvestrand.no> Mon, 26 September 2011 09:55 UTC
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Date: Mon, 26 Sep 2011 11:57:42 +0200
From: Harald Alvestrand <harald@alvestrand.no>
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To: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] draft-ietf-rtcweb-use-cases-and-requirements-05 addition around IPv6 only and dualstack
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On 09/26/11 08:34, Magnus Westerlund wrote: > Hi, > > (as individual) > > I would suggest that some section for general requirements that aren't > use case specific is created and at least one such requirement is added. > > The requirement is the need to support IPv4 only, IPv6 only and > dual-stack deployments as required by our charter. I think this should > be added into the use-case and requirement document for two reasons. > First, that is located next to the other requirements, secondly because > W3C has decided to use our document also, I think it is important that > such a general requirement both on protocols and any address field in > the API handling both address families are covered. I support adding those requirements. I think that it can also be instantiated within the specific use cases, such as: - Point to point call: One endpoint on IPv4, the other endpoint on IPv6 - Multipoint call (with and without central server): One user on IPv4, one user on IPv6 This is a limitation of the use-case-based model; it gets messy to shoehorn all the "permutations" of situations into a single set of use cases, without the list of use cases growing impossibly long or the use cases' description expanding into incomprehensibility. On balance, I think having a "considerations applicable to all scenarios" section saying: - Clients can be on IPv4-only - Clients can be on IPv6-only - Clients can be on dual-stack - Clients can be on wideband (10s of Mbits/sec) - Clients can be on narrowband (10s to 100s of Kbits/sec) - Clients can be on variable-media-quality networks (wireless) - Clients can be on congested networks - Clients can be on firewalled networks with no UDP allowed - Clients can be on networks with cone NAT - Clients can be on networks with symmetric NAT might be a good way to go forward. A particular query on v4/v6 interoperation: Should we make it a requirement that dual-stack to IPv4 always use the IPv4 native path rather than a gateway functionality (and the converse for IPv6), or should we just be silent about it? I think it may affect some tuning of the ICE address selection algorithm, in particular if we encounter 6to4 addresses. There might be RFCs we can cite already. > Cheers > > Magnus Westerlund > > ---------------------------------------------------------------------- > Multimedia Technologies, Ericsson Research EAB/TVM > ---------------------------------------------------------------------- > Ericsson AB | Phone +46 10 7148287 > Färögatan 6 | Mobile +46 73 0949079 > SE-164 80 Stockholm, Sweden| mailto: magnus.westerlund@ericsson.com > ---------------------------------------------------------------------- > > _______________________________________________ > rtcweb mailing list > rtcweb@ietf.org > https://www.ietf.org/mailman/listinfo/rtcweb >
- [rtcweb] draft-ietf-rtcweb-use-cases-and-requirem… Magnus Westerlund
- Re: [rtcweb] draft-ietf-rtcweb-use-cases-and-requ… Cameron Byrne
- Re: [rtcweb] draft-ietf-rtcweb-use-cases-and-requ… Harald Alvestrand
- Re: [rtcweb] draft-ietf-rtcweb-use-cases-and-requ… Stefan Håkansson LK
- Re: [rtcweb] draft-ietf-rtcweb-use-cases-and-requ… Salvatore Loreto
- Re: [rtcweb] draft-ietf-rtcweb-use-cases-and-requ… Jim McEachern