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Re: [tsvwg] L4S DSCP (was: L4S drafts: Next Steps)

"Rodney W. Grimes" <ietf@gndrsh.dnsmgr.net> Tue, 30 March 2021 13:27 UTC

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From: "Rodney W. Grimes" <ietf@gndrsh.dnsmgr.net>
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To: Sebastian Moeller <moeller0@gmx.de>
Date: Tue, 30 Mar 2021 06:26:57 -0700
CC: Bob Briscoe <in@bobbriscoe.net>, "tsvwg@ietf.org" <tsvwg@ietf.org>
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Subject: Re: [tsvwg] L4S DSCP (was: L4S drafts: Next Steps)
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> Bob,
> 
> since you asked,
> 
> > On Mar 30, 2021, at 10:21, Bob Briscoe <in@bobbriscoe.net> wrote:
> > [....]
> > 
> > [BB] None of these 3 quotes about NQB are anything to do with DSCP feedback, nor reading the DSCP at the receiver.
> 
> In Linux look at include/net/dsfield.h (https://elixir.bootlin.com/linux/latest/source/include/net/dsfield.h#L16)
> This will give the ability inside the kernel to get and set DSCPs for IPv4 and IPv6...
> Given that TCP Prague lives inside the kernel itself that should not be to hard to use.
> That will not help for other OSs, but since these do not have L4S compatible protocols today (with TCP Prague being the closest to compatibility) that should not be a show stopper.

Sebastian, Bob, twvwg,
I am aware that FreeBSD has similiar features, and some of the userland
daemons and clients can even be configured to use DSCP's.


> Best Regards
> 	Sebastian

Regards,
-- 
Rod Grimes                                                 rgrimes@freebsd.org

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