Re: [Bier] WGLC: draft-ietf-bier-php

[Tony Przygienda <[e-mail]>]

I don't see shepherd writedown on the doc to be able to progress it. Xioa,
pls provide writeup. If nothing happens next week, looking for a volunteer
...

thanks

-- tony

On Tue, Dec 7, 2021 at 4:03 PM Jeffrey (Zhaohui) Zhang <zzhang=
[e-mail]> wrote:

> Hi Greg,
>
>
>
> I posted -07 revision:
> https://datatracker.ietf.org/doc/draft-ietf-bier-php/
>
>
>
> Thanks!
>
> Jeffrey
>
>
>
> *From:* Greg Shepherd <[e-mail]>
> *Sent:* Monday, November 22, 2021 11:32 AM
> *To:* Jeffrey (Zhaohui) Zhang <[e-mail]>
> *Cc:* Loa Andersson <[e-mail]>; Mankamana Mishra (mankamis) <mankamis=
> [e-mail]>; [e-mail]
> *Subject:* Re: [Bier] WGLC: draft-ietf-bier-php
>
>
>
> *[External Email. Be cautious of content]*
>
>
>
> We have technically 'passed' last call, by time.. We were hoping to hear
> from Loa on the last rev.
>
> If the authors would like to see this work progress, please update the
> draft.
>
>
>
> We will also need a doc Shepherd to step up.
>
>
>
> Thanks,
>
>  - Shep
>
> (Chairs)
>
>
>
> On Thu, Sep 17, 2020 at 3:40 AM Jeffrey (Zhaohui) Zhang <
> [e-mail]> wrote:
>
> Hi Loa,
>
> Please see
> https://mailarchive.ietf.org/arch/msg/bier/xi6hpAdFLUBjYBVo9I4nr_418x4/
> <https://urldefense.com/v3/__https:/mailarchive.ietf.org/arch/msg/bier/xi6hpAdFLUBjYBVo9I4nr_418x4/__;!!NEt6yMaO-gk!REEzE69GJkIx6pOVyYS_H6JbMHQiSFLuzIrN5_BGnm7bBgMCeYetypQBCbxnF45Y$>
> and
> https://mailarchive.ietf.org/arch/msg/bier/nbPn1uq8XM_RsQq0vaUBQZ5JYjM/
> <https://urldefense.com/v3/__https:/mailarchive.ietf.org/arch/msg/bier/nbPn1uq8XM_RsQq0vaUBQZ5JYjM/__;!!NEt6yMaO-gk!REEzE69GJkIx6pOVyYS_H6JbMHQiSFLuzIrN5_BGnm7bBgMCeYetypQBCQI5Y9ZB$>
> .
>
> The -06 revision is here:
> https://tools.ietf.org/html/draft-ietf-bier-php-06
> <https://urldefense.com/v3/__https:/tools.ietf.org/html/draft-ietf-bier-php-06__;!!NEt6yMaO-gk!REEzE69GJkIx6pOVyYS_H6JbMHQiSFLuzIrN5_BGnm7bBgMCeYetypQBCVxT6wNS$>
> .
>
> Thanks!
> Jeffrey
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: BIER <[e-mail]> On Behalf Of Loa Andersson
> Sent: Thursday, September 17, 2020 3:20 AM
> To: Gyan Mishra <[e-mail]>; Mankamana Mishra (mankamis)
> <mankamis=[e-mail]>
> Cc: IJsbrand Wijnands (iwijnand) <iwijnand=[e-mail]>;
> Greg Shepherd <[e-mail]>; [e-mail]
> Subject: Re: [Bier] WGLC: draft-ietf-bier-php
>
> [External Email. Be cautious of content]
>
>
> Working Group, authors,
>
> I don't think I saw a response on this.
>
> /Loa
>
>
> On 22/08/2020 13:57, Loa Andersson wrote:
> > Working Group,
> >
> > I've had time to read the draft a bit more in detail.
> >
> > I'm convinced that this will work, and support progressing the draft.
> >
> > I still think there are some minor description details that could be
> > improved.
> >
> > The draft says:
> >
> >     One way to solve this problem is to use Penultimate Hop Popping (PHP)
> >     so that the upstream BFR can pop the BIER header and send the payload
> >     "natively" (note that the upstream BFR can be connected directly or
> >     indirectly via any type of tunnel to the PE).  This is similar to
> >     Multi-Protocol Label Switching (MPLS) PHP though it is the BIER
> >     header that is popped.
> >
> > This indicate that this is a "per node" decision, while in MPLS it is
> > a per LSP decision.
> >
> > I would think that it is possible for one node to be the penultimate
> > node for some traffic but not for other traffic, even though the
> > traffic is sent to the same node, which can be both ultimate node,
> > pen-ultimate node or transit node.
> >
> >
> >       +-------+              +-------+          +-------+
> >       |       |              |       |          |       |
> > -a,b-+   A   +-----a',b-----+   B   +----a'----+  CPE1 |
> >       |       |              |       |          |       |
> >       +-------+              +---+---+          +-------+
> >                                  |
> >                                  b'
> >                                  |
> >                              +---+---+          +-------+
> >                              |       |          |       |
> >                              +   C   +----b'----+  CPE2 |
> >                              |       |          |       |
> >                              +---+---+          +-------+
> >
> >
> > Two streams comes in to A from the left (a and b).
> >
> > A is the penultimate node for traffic to to CPE1 (a) so the BIER
> > header is popped.
> >
> > A is not the  penultimate node for traffic to to CPE2 (b) so the BIER
> > header is popped.
> >
> > Both a' and b is sent to B.
> >
> > B forward a' natively to CPE1.
> >
> > B is the penultimate node for traffic to to CPE2 (b) so the BIER
> > header is popped.
> >
> > b' is forwarded to C and onto CPE2
> >
> > Works just fine.
> >
> > Question: If the PHP is a "per node decision" how is A stopped from
> > doing PHP for b?
> >
> > /Loa
> >
> >
> >
> > On 22/08/2020 05:20, Gyan Mishra wrote:
> >>
> >> I support advancing this critical draft forward.  I agree that the
> >> PHP feature traditionally used with MPLS and has been adopted by SR
> >> and now by BIER for similar reasons of being able to pop the BIER
> >> header similar to what is done with SR PHP concept and now extensible
> >> with BIER for Non-BRF capable PE's.
> >>
> >> BIER IPv6 is still being developed, however I think maybe BIERin6
> >> could take advantage of  PHP by popping the encapsulated L2 1/2 BIER
> >> shim for "Non-BFR" capable PE.  I think for BIERv6 as the BIER header
> >> is encoded in DOH it may be difficult to support PHP.
> >>
> >> Thanks
> >>
> >> Gyan
> >>
> >> On Wed, Aug 19, 2020 at 2:01 PM Mankamana Mishra (mankamis)
> >> <mankamis=[e-mail]
> >> <mailto:[e-mail]>> wrote:
> >>
> >>     Support moving this document forward. ____
> >>
> >>     __ __
> >>
> >>     *From: *BIER <[e-mail] <mailto:[e-mail]>>
> >>     on behalf of "IJsbrand Wijnands (iwijnand)"
> >>     <iwijnand=[e-mail]
> >>     <mailto:[e-mail]>>
> >>     *Date: *Monday, August 17, 2020 at 11:56 AM
> >>     *To: *Greg Shepherd <[e-mail] <mailto:[e-mail]>>
> >>     *Cc: *"[e-mail] <mailto:[e-mail]>" <[e-mail]
> >>     <mailto:[e-mail]>>
> >>     *Subject: *Re: [Bier] WGLC: draft-ietf-bier-php____
> >>
> >>     __ __
> >>
> >>     In support moving this draft forward, ____
> >>
> >>     __ __
> >>
> >>     Thx,____
> >>
> >>     __ __
> >>
> >>     Ice.____
> >>
> >>     Sent from my iPhone____
> >>
> >>
> >>
> >>     ____
> >>
> >>         On 13 Aug 2020, at 05:31, Greg Shepherd <[e-mail]
> >>         <mailto:[e-mail]>> wrote:____
> >>
> >>
> >>         Please read and respond to this thread. We had a WGLC for this
> >>         draft previously, but had no response. Let’s do better. ____
> >>
> >>         __ __
> >>
> >>
> >> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-ie
> <https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-ie>
> >> tf-bier-php/______;!!NEt6yMaO-gk!Xc7KbkW_lel3I36HaEzsUA2xMeb5gSroB5W1
> >> mBAhG2yLZjknTH9OQEibSJ4RCvEs$
> >>
> >>         __ __
> >>
> >>         Start of short LC timer. Respond by Aug 19..____
> >>
> >>         __ __
> >>
> >>         - Shep____
> >>
> >>         (Chairs)____
> >>
> >>         _______________________________________________
> >>         BIER mailing list
> >>         [e-mail] <mailto:[e-mail]>
> >>
> >> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/bie
> <https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo/bie>
> >> r______;!!NEt6yMaO-gk!Xc7KbkW_lel3I36HaEzsUA2xMeb5gSroB5W1mBAhG2yLZjk
> >> nTH9OQEibSDeBjgsU$
> >>
> >>     _______________________________________________
> >>     BIER mailing list
> >>     [e-mail] <mailto:[e-mail]>
> >>
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> >> r__;!!NEt6yMaO-gk!Xc7KbkW_lel3I36HaEzsUA2xMeb5gSroB5W1mBAhG2yLZjknTH9
> >> OQEibSLzVgreZ$
> >>
> >>
> >>
> >> --
> >>
> >> <https://urldefense.com/v3/__http://www.verizon.com/__;!!NEt6yMaO-gk
> <https://urldefense.com/v3/__http:/www.verizon.com/__;!!NEt6yMaO-gk>!
> >> Xc7KbkW_lel3I36HaEzsUA2xMeb5gSroB5W1mBAhG2yLZjknTH9OQEibSH6MkdrA$ >
> >>
> >> *Gyan Mishra*
> >>
> >> /Network Solutions A//rchitect /
> >>
> >> /M 301 502-1347
> >> 13101 Columbia Pike
> >> /Silver Spring, MD
> >>
> >>
> >>
> >> _______________________________________________
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> >> r__;!!NEt6yMaO-gk!Xc7KbkW_lel3I36HaEzsUA2xMeb5gSroB5W1mBAhG2yLZjknTH9
> >> OQEibSLzVgreZ$
> >>
> >
>
> --
>
> Loa Andersson                        email: [e-mail]
> Senior MPLS Expert                          [e-mail]
> Bronze Dragon Consulting             phone: [phone]
>
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