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

"Jakob Heitz (jheitz)" <jheitz@cisco.com> Mon, 24 May 2021 21:37 UTC

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: idr <idr@ietf.org>
Thread-Topic: [Idr] I-D Action: draft-lapukhov-bgp-ecmp-considerations-06.txt
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/jFrFQrpdBMe6qdGiYGvocUWtwXI>
Subject: Re: [Idr] I-D Action: draft-lapukhov-bgp-ecmp-considerations-06.txt
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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<mailto: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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