Re: [Bier] WG adoption call for draft-chen-bier-frr-02

Tony Przygienda <> Fri, 26 March 2021 09:17 UTC

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From: Tony Przygienda <>
Date: Fri, 26 Mar 2021 10:16:51 +0100
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To: Huaimo Chen <>
Cc: "zhang.zheng" <>, BIER WG <>, BIER WG Chairs <>
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Subject: Re: [Bier] WG adoption call for draft-chen-bier-frr-02
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Excellent, having authors of multiple drafts in this area co-allesce and
colaborate on a single framework document would be a very positive and
productive development in my eyes. If it explains the IGP model e'one uses
today so far and the architecture kind of implies as default with IGP
signalling, the better.

Discussions around informational/experimental can happen later of course
but generally experimental will introduce the burden of two implementations
most likely (and with that many models that may not be trivial) and of
course experimental is needed in case we end up allocating codepoints or
need to agree on some on-the-wire formats (algorithms are not that clear).
We play it by the ear depending on the scope of the document as it evolves
and content would be my take for now.


-- tony

On Thu, Mar 25, 2021 at 10:05 PM Huaimo Chen <>

> 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 <> on behalf of Tony Przygienda <
> *Sent:* Tuesday, March 16, 2021 6:08 AM
> *To:* zhang.zheng <>
> *Cc:* BIER WG <>rg>; BIER WG Chairs <>
> *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 <> wrote:
> A 2-week WG adoption call begins for the following draft:
> <>
> 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)