Re: [Idr] I-D Action: draft-lapukhov-bgp-ecmp-considerations-06.txt

Jeff Tantsura <jefftant.ietf@gmail.com> Tue, 25 May 2021 06:02 UTC

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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
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Subject: Re: [Idr] I-D Action: draft-lapukhov-bgp-ecmp-considerations-06.txt
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Melchior and Jakob,

Many thanks for your comments, will address them ASAP.

Regards,
Jeff

> On May 24, 2021, at 14:37, Jakob Heitz (jheitz) <jheitz=40cisco.com@dmarc.ietf.org> wrote:
> 
> 
> Couple more:
>  
> AS_SET is not completely ignored. An AS_SET counts as one hop
> regardless of how many ASes are in the set.
>  
> Multiple paths with the same next-hop (possible with redundant
> route reflectors) count as a single path for the purpose of computing
> traffic distribution.
>  
> Regards,
> Jakob.
>  
> From: Idr <idr-bounces@ietf.org> On Behalf Of Melchior Aelmans
> Sent: Monday, May 24, 2021 1:05 PM
> To: idr <idr@ietf.org>rg>; draft-lapukhov-bgp-ecmp-considerations@ietf.org
> Subject: Re: [Idr] I-D Action: draft-lapukhov-bgp-ecmp-considerations-06.txt
>  
> Dear Authors,
>  
> Thanks for the updated draft and the work which I think is very useful.
>  
> I did read the draft just now and have a few textual suggestions;
>  
> - Section 3: "...all iBGP paths from the the ECMP candidates set..." --> remove 1x "the"
> - Section 4: "...as "skip igp check" ." --> Remove space between " and .
> - Section 4: "...IGP cost ." --> remove space between cost and .
> - Section 4: "nessesary" --> replace with "necessary"
> - Section 4: "deplyments" --> replace with "deployments"
> - Section 8: "implementaion" --> replace with "implementation"
>  
> Cheers,
> Melchior
>  
> On Mon, May 24, 2021 at 6:40 PM <internet-drafts@ietf.org> wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> 
> 
>         Title           : Equal-Cost Multipath Considerations for BGP
>         Authors         : Petr Lapukhov
>                           Jeff Tantsura
>         Filename        : draft-lapukhov-bgp-ecmp-considerations-06.txt
>         Pages           : 7
>         Date            : 2021-05-24
> 
> Abstract:
>    BGP (Border Gateway Protocol) [RFC4271] employs tie-breaking logic to
>    select a single best path among multiple paths available, known as
>    BGP best path selection.  At the same time, it has become a common
>    practice to allow for "equal-cost multipath" (ECMP) selection and
>    programming of multiple next-hops in routing tables.  This document
>    summarizes some common considerations for the ECMP logic when BGP is
>    used as the routing protocol, with the intent of providing common
>    reference for otherwise unstandardized set of features.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-lapukhov-bgp-ecmp-considerations/
> 
> There is also an htmlized version available at:
> https://datatracker.ietf.org/doc/html/draft-lapukhov-bgp-ecmp-considerations-06
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-lapukhov-bgp-ecmp-considerations-06
> 
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> 
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