Re: [tsvwg] Fwd: New Version Notification for draft-heist-tsvwg-ecn-deployment-observations-02.txt
Gorry Fairhurst <gorry@erg.abdn.ac.uk> Tue, 09 March 2021 14:42 UTC
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From: Gorry Fairhurst <gorry@erg.abdn.ac.uk>
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Date: Tue, 09 Mar 2021 14:42:15 +0000
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To: Pete Heist <pete@heistp.net>
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Subject: Re: [tsvwg] Fwd: New Version Notification for draft-heist-tsvwg-ecn-deployment-observations-02.txt
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I think I was one of the people wondering this, so thanks for this: > On 8 Mar 2021, at 22:19, Pete Heist <pete@heistp.net> wrote: > > I'm following up in this thread to one question that's come up- why is > an ISP deploying fq_codel in its backhaul? > > In short, this ISP encourages research and experiments by its members, > and this was a way to both see how much congestion exists, and attempt > to manage it with AQM when needed. Experiments with fq_codel were > started a couple of years ago, and I helped add support for it to their > custom router interface early last year. However, it's only actually > been enabled on a couple of routers, because: > - it takes a while to update routers in this environment > - some of the routers run kernels prior to fq_codel support > - congestion doesn't usually last long enough to give it much urgency, > and sometimes it's fixed by just adding capacity > > IMO, fq_codel isn't ideal in this situation. When there actually is > congestion to manage, flow-fairness means that one user can dominate > the queue with many flows, which is exactly one of the problems we'd > like to avoid. Host fairness could improve on this, or better yet, > member fairness using the member database, as members can have more > than one IP/MAC. But, fq_codel is what's available now, and generally > usable enough in this case to get started with AQM. > Interesting, and always helpful to see a little more of why specific deployments take place, Gorry >> On Mon, 2021-03-08 at 11:09 +0100, Pete Heist wrote: >> -------- Forwarded Message -------- >> Subject: New Version Notification for draft-heist-tsvwg-ecn- >> deployment- >> observations-02.txt >> Date: Mon, 08 Mar 2021 01:57:07 -0800 >> >>> A new version of I-D, draft-heist-tsvwg-ecn-deployment- >>> observations- >>> 02.txt >>> has been successfully submitted by Peter G. Heist and posted to the >>> IETF repository. >>> >>> Name: draft-heist-tsvwg-ecn-deployment-observations >>> Revision: 02 >>> Title: Explicit Congestion Notification (ECN) Deployment >>> Observations >>> Document date: 2021-03-08 >>> Group: Individual Submission >>> Pages: 30 >>> URL: >>> https://www.ietf.org/archive/id/draft-heist-tsvwg-ecn-deployment-observations-02.txt >>> Status: >>> https://datatracker.ietf.org/doc/draft-heist-tsvwg-ecn-deployment-observations/ >>> Html: >>> https://www.ietf.org/archive/id/draft-heist-tsvwg-ecn-deployment-observations-02.html >>> Htmlized: >>> https://tools.ietf.org/html/draft-heist-tsvwg-ecn-deployment-observations-02 >>> Diff: >>> https://www.ietf.org/rfcdiff?url2=draft-heist-tsvwg-ecn-deployment-observations-02 >>> >>> Abstract: >>> This note presents data gathered at an Internet Service >>> Provider's >>> gateway on the observed deployment and usage of ECN. Relevant >>> IP >>> counter and flow tracking data was collected and analyzed for >>> TCP >>> and other protocols. >> >> A few updates in this version: >> >> * Improved statistics for the separated "known" and "unknown" AQMs. >> >> * Clarified the detection method for possible AQMs. >> >> * Added possibility of QUIC-ECN traffic in non-TCP data. >> >> Pete >> >> >
- [tsvwg] Fwd: New Version Notification for draft-h… Pete Heist
- Re: [tsvwg] Fwd: New Version Notification for dra… Pete Heist
- Re: [tsvwg] Fwd: New Version Notification for dra… Bob Briscoe
- Re: [tsvwg] Fwd: New Version Notification for dra… Pete Heist
- Re: [tsvwg] New Version Notification for draft-he… Sebastian Moeller
- Re: [tsvwg] New Version Notification for draft-he… Pete Heist
- Re: [tsvwg] New Version Notification for draft-he… Jonathan Morton
- Re: [tsvwg] New Version Notification for draft-he… Sebastian Moeller
- Re: [tsvwg] Fwd: New Version Notification for dra… Gorry Fairhurst
- Re: [tsvwg] New Version Notification for draft-he… Ingemar Johansson S
- Re: [tsvwg] New Version Notification for draft-he… Jonathan Morton
- Re: [tsvwg] New Version Notification for draft-he… Gorry Fairhurst
- Re: [tsvwg] New Version Notification for draft-he… Jonathan Morton
- Re: [tsvwg] New Version Notification for draft-he… Gorry Fairhurst
- Re: [tsvwg] New Version Notification for draft-he… alex.burr@ealdwulf.org.uk
- Re: [tsvwg] New Version Notification for draft-he… Gorry Fairhurst
- Re: [tsvwg] New Version Notification for draft-he… Jonathan Morton
- Re: [tsvwg] New Version Notification for draft-he… Jonathan Morton
- Re: [tsvwg] New Version Notification for draft-he… Ingemar Johansson S
- Re: [tsvwg] New Version Notification for draft-he… Jonathan Morton
- Re: [tsvwg] Fwd: New Version Notification for dra… Bob Briscoe
- Re: [tsvwg] New Version Notification for draft-he… Bob Briscoe
- Re: [tsvwg] New Version Notification for draft-he… Sebastian Moeller
- Re: [tsvwg] New Version Notification for draft-he… Jonathan Morton
- Re: [tsvwg] Fwd: New Version Notification for dra… Pete Heist
- Re: [tsvwg] Fwd: New Version Notification for dra… Jonathan Morton