Re: [tsvwg] Your NQB presentation
"Black, David" <David.Black@dell.com> Fri, 22 November 2019 01:48 UTC
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From: "Black, David" <David.Black@dell.com>
To: Greg White <g.white@CableLabs.com>, Sebastian Moeller <moeller0@gmx.de>, tsvwg IETF list <tsvwg@ietf.org>
Thread-Topic: Your NQB presentation
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Date: Fri, 22 Nov 2019 01:47:59 +0000
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References: <B654E9D3-A5E2-45AC-A4D3-E86757263CFB@gmx.de> <490F228F-57B3-430F-ABC8-38350E44EAC7@cablelabs.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/tsvwg/8D8dIJvVjO0rbodCT2vHfXBYcQM>
Subject: Re: [tsvwg] Your NQB presentation
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> The proposal (David, feel free to jump in if I've misstated anything) is to select > the 0x2A code point, and add two requirements to address the WiFi safety > concern: > > An ISP node that supports the NQB PHB and serves residential users MUST have > the ability to re-mark NQB traffic as default, and MUST do so by default. > > (precise wording to be smithed) > > I think that this achieves the same end result as selecting a low-valued code > point - it ensures that operators will need to actively decide to pass the 0x2A > codepoint through to their residential customers. That’s a reasonable summary, and indeed, the word "residential" will almost certainly need some wordsmithing attention. The basic idea is that a default configuration that bleaches NQB traffic places the responsibility for the effects of not bleaching on whomever changed that default configuration - we can't prevent people who are determined to shoot themselves in the foot from accomplishing that goal ;-). With careful wordsmithing, this will also cover end-user-purchased/provided ISP interface equipment because it'll come with that same default configuration if NQB is supported. Thanks, --David > -----Original Message----- > From: tsvwg <tsvwg-bounces@ietf.org> On Behalf Of Greg White > Sent: Thursday, November 21, 2019 8:30 PM > To: Sebastian Moeller; tsvwg IETF list > Subject: Re: [tsvwg] Your NQB presentation > > > [EXTERNAL EMAIL] > > Sebastian, all, > > I had a discussion with David Black on the subject of DSCP and he proposed a > resolution that perhaps addresses the main concerns that have been expressed. > > The proposal (David, feel free to jump in if I've misstated anything) is to select > the 0x2A code point, and add two requirements to address the WiFi safety > concern: > > An ISP node that supports the NQB PHB and serves residential users MUST have > the ability to re-mark NQB traffic as default, and MUST do so by default. > > (precise wording to be smithed) > > I think that this achieves the same end result as selecting a low-valued code > point - it ensures that operators will need to actively decide to pass the 0x2A > codepoint through to their residential customers. > > In addition to these two MUSTs, we need some clear and concise informative > text that discusses the WMM safety concern. > > I think we share the belief that the vast majority (all?) residential ISPs currently > bleach ALL DSCPs to default for their residential customers, and so the 0x2A > value will already be handled in the same manner, but these requirements and > the (to be written) informative text will help ensure operators only deviate from > that default state consciously. > > -Greg > > > On 11/22/19, 5:13 AM, "Sebastian Moeller" <moeller0@gmx.de> wrote: > > Dear Greg, dear list, > > > I just had the opportunity to watch the video of your presentation. Just a quick > note that I very much appreciated the balanced, concise and unbiased > presentation of the PHB and the open issues. > > Regarding code points, I had proposed 0x2E since it is the "sum" of 0x6 and > CS5, so I saw a cute "symmetry" there, but since it is is taken already (and I > agree the goal should be for NQB to be ideally unambiguous end to end) I am > fine with 0x2A for the case when AC_VI is known to be safe to use. > > > Best Regards > Sebastian
- [tsvwg] Your NQB presentation Sebastian Moeller
- Re: [tsvwg] Your NQB presentation Greg White
- Re: [tsvwg] Your NQB presentation Black, David
- Re: [tsvwg] Your NQB presentation Michael Welzl
- Re: [tsvwg] Your NQB presentation Greg White
- Re: [tsvwg] Your NQB presentation Michael Welzl
- Re: [tsvwg] Your NQB presentation Sebastian Moeller
- Re: [tsvwg] Your NQB presentation Black, David
- Re: [tsvwg] Your NQB presentation Sebastian Moeller