Re: [bess] WG adoption poll and IPR poll for draft-snr-bess-evpn-loop-protect

"Ali Sajassi (sajassi)" <sajassi@cisco.com> Thu, 03 October 2019 06:17 UTC

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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>, "draft-snr-bess-evpn-loop-protect@ietf.org" <draft-snr-bess-evpn-loop-protect@ietf.org>
CC: "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Thread-Topic: [bess] WG adoption poll and IPR poll for draft-snr-bess-evpn-loop-protect
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Date: Thu, 3 Oct 2019 06:17:13 +0000
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Subject: Re: [bess] WG adoption poll and IPR poll for draft-snr-bess-evpn-loop-protect
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We need to cover the loop protection for EVPN as we needed to cover MAC duplicate detection in EVPN. However, I am wondering why not simply cover it in couple of paragraphs in RFC7432bis. I made this comment when this draft was presented for the first time. My rational for it is as follow:


  1.  The detection mechanism for loop protection is identical to MAC duplicate detection as described in section 15.1 of RFC 7432. As the matter of fact the procedure described in section 15.1 of RFC 7432 is repeated in this new draft.
  2.  The only difference is action taken. For MAC duplicate detection, we stop advertising the learned MAC address; whereas, for loop prevention, we install an ACL for the duplicate MAC.
  3.  We should also try to use commonly used terms as opposed to inventing new terms – i.e., instead of creating a new section in describing what blackhole MAC is, we should simply say we want to install ACL for MAC SA (to get discarded).
  4.  The new timer for flushing MAC SA and restarting the process IMO is questionable and should not be used.

Again, if we were not doing RFC7432bis, I would have been very supportive of this draft as we do need to cover loop protection; however, given that we can cover this loop protection by just adding one or two paragraphs to section 15.1, then I really don’t see the need to create unnecessary reading materials for our community.

Cheers,
Ali



From: BESS <bess-bounces@ietf.org> on behalf of "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>
Date: Monday, September 2, 2019 at 7:29 AM
To: "bess@ietf.org" <bess@ietf.org>, "draft-snr-bess-evpn-loop-protect@ietf.org" <draft-snr-bess-evpn-loop-protect@ietf.org>
Cc: "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Subject: [bess] WG adoption poll and IPR poll for draft-snr-bess-evpn-loop-protect

Hi,

This email begins a two-weeks WG adoption poll for draft-snr-bess-evpn-loop-protect-04 [1]
Please review the draft and post any comments to the BESS working group list.

We are also polling for knowledge of any undisclosed IPR that applies to this Document, to ensure that IPR has been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an author or a contributor of this document, please respond to this email and indicate whether or not you are aware of any relevant undisclosed IPR, copying the BESS mailing list. The document won't progress without answers from all the authors and contributors.
Currently, there are no IPR disclosures against this document.

If you are not listed as an author or a contributor, then please explicitly respond only if you are aware of any IPR that has not yet been disclosed in conformance with IETF rules.

This poll for adoption closes on 16th September 2019.

Regards,
Stephane and Matthew

[1] https://datatracker.ietf.org/doc/draft-snr-bess-evpn-loop-protect/




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Stephane Litkowski
Network Architect
Orange/SCE/EQUANT/OINIS/NET
Orange Expert Future Networks
phone: +33 2 23 06 49 83 <https://monsi.sso.francetelecom.fr/index.asp?target=http%3A%2F%2Fclicvoice.sso.francetelecom.fr%2FClicvoiceV2%2FToolBar.do%3Faction%3Ddefault%26rootservice%3DSIGNATURE%26to%3D+33%202%2023%2028%2049%2083%20>  NEW !
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