Re: [tsvwg] Chairs slides for interim meeting
"Black, David" <David.Black@dell.com> Thu, 20 February 2020 13:49 UTC
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From: "Black, David" <David.Black@dell.com>
To: "Rodney W. Grimes" <ietf@gndrsh.dnsmgr.net>
CC: "tsvwg@ietf.org" <tsvwg@ietf.org>, "Black, David" <David.Black@dell.com>
Thread-Topic: [tsvwg] Chairs slides for interim meeting
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Date: Thu, 20 Feb 2020 13:49:46 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/tsvwg/88sQRVcNg1vTWG6O9Unh1kbxn4A>
Subject: Re: [tsvwg] Chairs slides for interim meeting
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Yes, the ECN Nonce is no longer relevant. RFC 8311 (which is an IETF consensus document) states that the RFC: o Declares that the ECN nonce experiment [RFC3540] has concluded and notes the absence of widespread deployment. Applying errata to one or both RFCs (4774 and 8311) seems to be a suitable means of dealing with this situation. Thanks, --David > -----Original Message----- > From: Rodney W. Grimes <ietf@gndrsh.dnsmgr.net> > Sent: Wednesday, February 19, 2020 10:02 PM > To: Rodney W. Grimes > Cc: Black, David; tsvwg@ietf.org > Subject: Re: [tsvwg] Chairs slides for interim meeting > > > [EXTERNAL EMAIL] > > > David, > > A comment in line below about your Hint to RFC 4774. > > > > > I've posted the chairs slides for the interim meeting on how we plan > (hope?) to make progress in the interim meeting and at the Vancouver > meeting. They focus on ECT(1) usage. > > > > > > These slides and the rest of the materials for the interim meeting are > (and will be) posted here: https://datatracker.ietf.org/meeting/interim- > 2020-tsvwg-01/session/tsvwg > > > > > > Hint: RFC 4774 "Specifying Alternate Semantics for the Explicit Congestion > Notification (ECN) Field" is relevant background, especially Section 4.3 > (Option 3: Friendly Coexistence with Competing Traffic). > > > > In reading RFC 4774 Section 4.3 at paragraph 9 we find: > > A requirement for compatibility with end-nodes using default ECN is > > that if a packet that *could* be using default semantics is marked > > with the ECN codepoint "00", this marking must not be changed to > > "01", "10", or "11" in the network. This prevents the packet from > > being represented incorrectly to a default-ECN router downstream as > > ECN-Capable. Similarly, if a packet that *could* be using default > > semantics is marked with the ECN codepoint "01", then this codepoint > > should not be changed to "10" in the network (and a "10" codepoint > > should not be changed to "01"). This requirement is necessary to > > avoid interference with the transport protocol's use of the ECN nonce > > [RFC3540]. > > > > For this purposes of this "Hint" can we consider that paragraph > > to be stricken since RFC3540 and ECN nonce have been made historical > > in scope? > > Correction, last 2 sentences stricken, not the whole paragraph. > > > Further I note that this RFC and BCP does not have an update to it > > that would make the above paragraph obsolete, should something be > > done about that? An errata? > > > > > > Thanks, > > Rod > > > > > Thanks, --David (with apologies for extending the IETF practice of just-in- > time slide preparation) > > > ---------------------------------------------------------------- > > > David L. Black, Sr. Distinguished Engineer, Dell EMC > > > Dell Technologies, Infrastructure Systems Group > > > 176 South St., Hopkinton, MA 01748 > > > +1 (774) 350-9323<tel:+17743509323> Mobile: +1 (978) 394- > 7754<tel:+19783947754> > > > David.Black@dell.com<mailto:David.Black@dell.com> > > > ---------------------------------------------------------------- > > -- > > Rod Grimes rgrimes@freebsd.org > > > > > > -- > Rod Grimes rgrimes@freebsd.org
- [tsvwg] Chairs slides for interim meeting Black, David
- Re: [tsvwg] Chairs slides for interim meeting alex.burr@ealdwulf.org.uk
- Re: [tsvwg] Chairs slides for interim meeting Black, David
- Re: [tsvwg] Chairs slides for interim meeting Rodney W. Grimes
- Re: [tsvwg] Chairs slides for interim meeting Rodney W. Grimes
- Re: [tsvwg] Chairs slides for interim meeting Black, David