[Dart] Diffserv survival...

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 24 June 2014 03:58 UTC

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Date: Tue, 24 Jun 2014 15:58:02 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Subject: [Dart] Diffserv survival...
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This is really a comment on draft-ietf-tsvwg-rtcweb-qos,
but I think the discussion should perhaps start here.

draft-ietf-tsvwg-rtcweb-qos is aligned with a subset of
RFC 4594, which is entirely reasonable since the update of that
RFC seems to be on hold.

However, in terms of what DSCPs have a good chance of actually
crossing ISP boundaries in one piece, I think we should also
look at draft-geib-tsvwg-diffserv-intercon. The main issue
is that draft-geib suggests a quite small set of DSCPs that
would hypothetically cross boundaries. Personally I think
that is realistic and might even happen, whereas the set
proposed in rtcweb-qos looks implausibly large to me, and
very unlikely ever to be supported in peering relationships.