Re: [Bier] WG adoption call for draft-chen-bier-frr-02
Adrian Farrel <adrian@olddog.co.uk> Tue, 30 March 2021 18:04 UTC
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Reply-To: adrian@olddog.co.uk
From: Adrian Farrel <adrian@olddog.co.uk>
To: 'Michael McBride' <michael.mcbride@futurewei.com>, gjshep@gmail.com
Cc: "'Jeffrey (Zhaohui) Zhang'" <zzhang@juniper.net>, zhang.zheng@zte.com.cn, 'BIER WG' <bier@ietf.org>, 'Huaimo Chen' <huaimo.chen@futurewei.com>, 'BIER WG Chairs' <bier-chairs@ietf.org>
References: <202103161440487606255@zte.com.cn> <CA+wi2hPLG_Og=rDerVqK7hMjkjUGxzjpQnZMSFMf965UVLCxNA@mail.gmail.com> <MN2PR13MB408751B2E8ACDF05AC9C34B3F2629@MN2PR13MB4087.namprd13.prod.outlook.com> <MN2PR05MB59811BDE5E469F7C39E253DAD47D9@MN2PR05MB5981.namprd05.prod.outlook.com> <CABFReBqyAEtW=SmkbU_ub2CEOq+wDADmDyBuUz8Um_-oqKw93g@mail.gmail.com> <BYAPR13MB2582C0A8C1076560663C098DF47D9@BYAPR13MB2582.namprd13.prod.outlook.com> <CABFReBoU2NCLNFtQ6eqhciM2DaH5UtWfoKAMM8Yok53=zC+mAA@mail.gmail.com> <BYAPR13MB2582128E4084D642BCAA2396F47D9@BYAPR13MB2582.namprd13.prod.outlook.com>
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Date: Tue, 30 Mar 2021 18:48:41 +0100
Organization: Old Dog Consulting
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bier/Qn8vUpDL2DeWNi0ix7jPeIHYkcY>
Subject: Re: [Bier] WG adoption call for draft-chen-bier-frr-02
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Mike, I believe that the chairs are empowered to appoint editors for working group drafts, although this is something I have only seen a very few times in my IETF involvement. Normally, unless there is a breakdown of some sort, the authors are left to self-organise. However, before a draft is adopted, I don't think the chairs have such a power. They can, of course, strongly recommend. And the chairs could start a design team to work on a new draft and appoint whoever they want to that design team. If that new draft decided to reuse substantial part of another active draft without the blessing of the authors of the other draft, then that would be "bad form". Cheers, Adrian From: BIER <bier-bounces@ietf.org> On Behalf Of Michael McBride Sent: 30 March 2021 18:05 To: gjshep@gmail.com Cc: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net>; EXT-zhang.zheng@zte.com.cn <zhang.zheng@zte.com.cn>; BIER WG <bier@ietf.org>; Huaimo Chen <huaimo.chen@futurewei.com>; BIER WG Chairs <bier-chairs@ietf.org> Subject: Re: [Bier] WG adoption call for draft-chen-bier-frr-02 I'm honestly at a loss here. An assigned editor to take over our work? Is this even a thing in the ietf? If this is the case we will continue working on this draft and keep it individual for now. mike From: Greg Shepherd <gjshep@gmail.com <mailto:gjshep@gmail.com> > Sent: Tuesday, March 30, 2021 9:48 AM To: Michael McBride <michael.mcbride@futurewei.com <mailto:michael.mcbride@futurewei.com> > Cc: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net <mailto:zzhang@juniper.net> >; BIER WG <bier@ietf.org <mailto:bier@ietf.org> >; BIER WG Chairs <bier-chairs@ietf.org <mailto:bier-chairs@ietf.org> >; EXT-zhang.zheng@zte.com.cn <mailto:EXT-zhang.zheng@zte.com.cn> <zhang.zheng@zte.com.cn <mailto:zhang.zheng@zte.com.cn> >; Huaimo Chen <huaimo.chen@futurewei.com <mailto:huaimo.chen@futurewei.com> > Subject: Re: [Bier] WG adoption call for draft-chen-bier-frr-02 On Tue, Mar 30, 2021 at 9:28 AM Michael McBride <michael.mcbride@futurewei.com <mailto:michael.mcbride@futurewei.com> > wrote: > ..contribute two authors to the merged doc effort, and have Jeffrey hold the pen as editor/author. Huh? All authors from both drafts will remain on the merged draft Pick them now or pick them later. and, as much as we respect Jeffrey, he's not an author and certainly doesn't hold the pen. As the assigned Editor to work with the author of both drafts, yes he will hold the pen. If you have another 3rd party Editor to suggest, please do so. But from the current discussion on the list, I find no one more qualified to work with the authors of both contributing drafts. Thanks, Greg Mike All agreed? Thanks, Greg (Chairs) On Mon, Mar 29, 2021 at 7:26 PM Jeffrey (Zhaohui) Zhang <zzhang@juniper.net <mailto:zzhang@juniper.net> > wrote: Shouldn't it be the other way around - expand/merge first and then adopt? In fact, the essence of draft-chen is the multiple per-nbr FRR BIFTs, which I don't think should be included in the merged draft at all, for the following problems: 1. Scaling - we need one extra BIFT for each <neighbor, BIFT>. This not only means extra memory, but also additional processing overhead including downloading the tables to the forwarding plane. 2. If two neighbors fail simultaneously yet both can be protected by a 3rd neighbor, per-nbr FRR BIFTs can only give protection for one of the first two neighbors. This is not an unusual situation - you could have two neighbors reached by the same link or the same line card, and the link/card fails. 3. Exactly when to switch back from a per-nbr FRR BIFT to the regular BIFT? The draft says the following about #3: In general, when the routing protocol has re-converged on the new topology taking into account the failure of X, the BIRT is re- computed using the updated LSDB and the BIFT is re-derived from the BIRT. Once the BIFT is installed ready for activation, it is activated to forward packets with BIER headers and the FRR-BIFT for X is de-activated. Does that mean for each computation, you need to know and mark which failed neighbor that it takes care of, so that when the BIFT is sent down to forwarding plane you can decide if currently used FRR-BIFT can be switched back to the main BIFT? Also consider the following: 1. At moment T you switch to FRR BIFT for nbr X 2. At moment T+1ms a new BIFT is calculated, which takes care of a remote failure but not nbr X (nbr X is still considered up in this calculation) - would you switch FRR BIFT to the newly calculated main BIFT? If you don't, the remote failure could lead to packet losses until the new main BIFT is used. If you do, you only get FRR protection for nbr X for 1ms. Jeffrey From: BIER <bier-bounces@ietf.org <mailto:bier-bounces@ietf.org> > On Behalf Of Huaimo Chen Sent: Thursday, March 25, 2021 5:06 PM To: Tony Przygienda <tonysietf@gmail.com <mailto:tonysietf@gmail.com> >; EXT-zhang.zheng@zte.com.cn <mailto:EXT-zhang.zheng@zte.com.cn> <zhang.zheng@zte.com.cn <mailto:zhang.zheng@zte.com.cn> > Cc: BIER WG <bier@ietf.org <mailto:bier@ietf.org> >; BIER WG Chairs <bier-chairs@ietf.org <mailto:bier-chairs@ietf.org> > Subject: Re: [Bier] WG adoption call for draft-chen-bier-frr-02 [External Email. Be cautious of content] Hi Everyone, Michael, Steffan, Huaimo and Mike met to discuss the merge and we are in agreement that if draft-chen-bier-frr is adopted we will expand it to include a framework along with the tunnel and LFA based solutions. Best Regards, Huaimo _____ From: BIER <bier-bounces@ietf.org <mailto:bier-bounces@ietf.org> > on behalf of Tony Przygienda <tonysietf@gmail.com <mailto:tonysietf@gmail.com> > Sent: Tuesday, March 16, 2021 6:08 AM To: zhang.zheng <zhang.zheng@zte.com.cn <mailto:zhang.zheng@zte.com.cn> > Cc: BIER WG <bier@ietf.org <mailto:bier@ietf.org> >; BIER WG Chairs <bier-chairs@ietf.org <mailto:bier-chairs@ietf.org> > Subject: Re: [Bier] WG adoption call for draft-chen-bier-frr-02 +1 I think it's a good addition within the architecture for the case IGP is not used for signalling, e.g. when controller or static programming. The draft must however explain in what scenarios it is used and quote the according IGP drafts to guarantee loop-free behavior (well, BIER will tie-break loops but we'll have 1x microloop & possibly not deliver payload if BIER FRR is not properly computed/intsalled). With that the draft should also pay attention to how the function is deployed/updated network-wide if IGP is not present thanks -- tony On Tue, Mar 16, 2021 at 7:41 AM <zhang.zheng@zte.com.cn <mailto:zhang.zheng@zte.com.cn> > wrote: A 2-week WG adoption call begins for the following draft: https://datatracker.ietf.org/doc/draft-chen-bier-frr/ Please indicate your support or objection by March 30th, 2021. Authors, please respond to the list indicating whether you are aware of any IPR that applies to this draft. Thanks, Sandy (As WG secretary, on behalf of Greg/Tony) Juniper Business Use Only
- [Bier] WG adoption call for draft-chen-bier-frr-02 zhang.zheng
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gyan Mishra
- [Bier] 答复: WG adoption call for draft-chen-bier-f… qinfengwei
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gengxuesong (Geng Xuesong)
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Mirsky
- Re: [Bier] WG adoption call for draft-chen-bier-f… Aijun Wang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gengxuesong (Geng Xuesong)
- Re: [Bier] WG adoption call for draft-chen-bier-f… peng.shaofu
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gengxuesong (Geng Xuesong)
- Re: [Bier] WG adoption call for draft-chen-bier-f… peng.shaofu
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Bidgoli, Hooman (Nokia - CA/Ottawa)
- Re: [Bier] WG adoption call for draft-chen-bier-f… Linda Dunbar
- Re: [Bier] WG adoption call for draft-chen-bier-f… Yanhe Fan
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael McBride
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gengxuesong (Geng Xuesong)
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gengxuesong (Geng Xuesong)
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Donald Eastlake
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Mirsky
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeff Tantsura
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Mirsky
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Mirsky
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Mirsky
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… LEI LIU
- Re: [Bier] WG adoption call for draft-chen-bier-f… peng.shaofu
- Re: [Bier] WG adoption call for draft-chen-bier-f… duanfanghong
- Re: [Bier] WG adoption call for draft-chen-bier-f… Lizhenbin
- Re: [Bier] WG adoption call for draft-chen-bier-f… Xufeng Liu
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gyan Mishra
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… zhangzhe (M)
- Re: [Bier] WG adoption call for draft-chen-bier-f… Steffen Lindner
- Re: [Bier] WG adoption call for draft-chen-bier-f… Daniel Merling
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Mirsky
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Shepherd
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael McBride
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Shepherd
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael McBride
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Adrian Farrel
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gyan Mishra
- Re: [Bier] WG adoption call for draft-chen-bier-f… peng.shaofu
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gengxuesong (Geng Xuesong)
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Tony Przygienda
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth
- Re: [Bier] WG adoption call for draft-chen-bier-f… Gengxuesong (Geng Xuesong)
- Re: [Bier] WG adoption call for draft-chen-bier-f… peng.shaofu
- Re: [Bier] WG adoption call for draft-chen-bier-f… Jeffrey (Zhaohui) Zhang
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Shepherd
- Re: [Bier] WG adoption call for draft-chen-bier-f… Mankamana Mishra (mankamis)
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Shepherd
- Re: [Bier] WG adoption call for draft-chen-bier-f… Huaimo Chen
- Re: [Bier] WG adoption call for draft-chen-bier-f… Greg Shepherd
- Re: [Bier] WG adoption call for draft-chen-bier-f… Michael Menth