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[Idr] Re: WG Adoption for draft-ssangli-idr-bgp-generic-metric-00 (7/9 to 7/23/2024)

Krzysztof Szarkowicz <kszarkowicz@gmail.com> Mon, 15 July 2024 10:11 UTC

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From: Krzysztof Szarkowicz <kszarkowicz@gmail.com>
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Date: Mon, 15 Jul 2024 12:10:52 +0200
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To: Susan Hares <shares@ndzh.com>
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Subject: [Idr] Re: WG Adoption for draft-ssangli-idr-bgp-generic-metric-00 (7/9 to 7/23/2024)
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I support WG adoption of this draft.

//Krzysztof

> On Jul 9, 2024, at 17:56, Susan Hares <shares@ndzh.com> wrote:
> 
> This begins a 2 week WG Adoption  (7/9/2024 to 7/23/2024)
> for draft-ssangli-idr-bgp-generic-metric-00
> https://datatracker.ietf.org/doc/draft-ssangli-idr-bgp-generic-metric/
>                                                           
> All authors should reply to this email with an IPR Statement. 
>  
> This draft is a revision of the concepts in
> draft-ssangli-idr-bgp-generic-metric-aigp-08,
> But uses the NextHop Dependent Capability.
>  
> A short description of from the document may help you review the text.
>  
>    RFC7311 describes mechanism for carrying accumulated IGP cost across
>    BGP domains however it limits to IGP-metric only.  There is a need to
>    accumulate and propagate different types of metrics as it will aid in
>    intent-based end-to-end path across BGP domains.  This document
>    defines BGP extensions for Generic Metric sub-types that enable
>    different types of metrics to be accumulated and carried in BGP.
>    This is applicable when multiple domains exchange BGP routing
>    information.
>  
>    This document proposes "Accumulated Metric" TLV in the Next-Hop
>    Dependent Capability (NHC) attribute described in
>    [I-D.ietf-idr-entropy-label] to carry the accumulated metric value
>    for end-to-end path, hereby referred as AMetric.  The AMetric
>    supports all the metric types defined in the IGP-Parameters metric-
>    type registry.  Additionally this document provides procedures for
>    computation and usage of accumulated generic metric value during the
>    BGP best path computation.
>  
> In your comments, please consider: 
>  
> 1.  Does this mechanism solve the problem we have discussed in interims on AIGP metrics? 
> 2.  Are there any downsides to using NHC? 
> 3.  Do you support IDR working on this mechanism? 
>  
> Cheerily, Sue Hares 
>  
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