Re: [tsvwg] A review of draft-ietf-tsvwg-l4s-arch-09

Bob Briscoe <ietf@bobbriscoe.net> Thu, 24 June 2021 17:50 UTC

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To: Neal Cardwell <ncardwell@google.com>, Vidhi Goel <vidhi_goel=40apple.com@dmarc.ietf.org>
Cc: tsvwg IETF list <tsvwg@ietf.org>
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From: Bob Briscoe <ietf@bobbriscoe.net>
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Date: Thu, 24 Jun 2021 18:50:21 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/tsvwg/1Mn9yGCfnWXupo0KxnQz5IOukm8>
Subject: Re: [tsvwg] A review of draft-ietf-tsvwg-l4s-arch-09
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Neal,

Thx - I'd already used the README as the ref for BBRv2, 'cos it contains 
a link to the CC module code.
  (and thx for the other mail confirming the other responses are AOK)


Bob

On 22/06/2021 21:33, Neal Cardwell wrote:
> On Tue, Jun 22, 2021 at 12:03 AM Vidhi Goel 
> <vidhi_goel=40apple.com@dmarc.ietf.org 
> <mailto:40apple.com@dmarc.ietf.org>> wrote:
>
>     3. Section 4, Hosts
>     >> Also the L4S ECN part of
>
>     BBRv2 [I-D.cardwell-iccrg-bbr-congestion-control
>     <https://datatracker.ietf.org/doc/html/draft-ietf-tsvwg-l4s-arch-09#ref-I-D.cardwell-iccrg-bbr-congestion-control>]
>     is a scalable congestion control intended for the TCP and QUIC
>     transports, amongst others.
>
>     The BBR draft has no mention of L4S ECN so far. Are we expecting
>     an updated BBR draft and reference? There is another reference in
>     Section 5.2.
>
>
> If it's desired to have references for BBRv2 that cover the topic of 
> ECN, in order to avoid having dependencies on future BBR draft 
> updates, it may make sense to reference already-existing documentation 
> about BBRv2. Some possible options:
>
> (1) BBRv2 algorithm high-level overview:
> https://datatracker.ietf.org/meeting/104/materials/slides-104-iccrg-an-update-on-bbr-00 
> <https://datatracker.ietf.org/meeting/104/materials/slides-104-iccrg-an-update-on-bbr-00>
>
> (2) the BBRv2 alpha release for Linux TCP:
> https://github.com/google/bbr/blob/v2alpha/README.md 
> <https://github.com/google/bbr/blob/v2alpha/README.md>
>
> (3) code from the BBRv2 alpha release for Linux TCP:
> https://github.com/google/bbr/blob/v2alpha/net/ipv4/tcp_bbr2.c 
> <https://github.com/google/bbr/blob/v2alpha/net/ipv4/tcp_bbr2.c>
>
> Thanks,
> neal
>

-- 
________________________________________________________________
Bob Briscoe                               http://bobbriscoe.net/