[bess] Re: Review request for draft - Efficient service carving in Multi-homed Evpn networks

["Jorge Rabadan (Nokia)" <[e-mail]>]

Hi everyone,

As requested by the chairs, I went through the text.
Here are my comments, Kiran, in case they help:


  *   The text introduces a new DF election algorithm to address the gaps in the default algorithm defined in RFC 7432. However, it does not mention HRW (RFC 8584) or compare the proposed approach to it, even though HRW was introduced specifically to address these same gaps.
  *   The proposed DF algorithm appears to use only VLANs as input, which means it would suffer from the same imbalance across ESes as the default algorithm — one of the issues highlighted in RFC 8584 and one of the key reasons for introducing HRW.
  *   The text states that the proposal is “backward compatible with the procedures defined in RFC 7432,” but it does not clarify which specific procedures it refers to.
  *   Also, this text does not seem correct to me (RFC7432 does not support “capabilities” or different DF Election algorithms):

“As suggested in RFC7432<https://datatracker.ietf.org/doc/html/rfc7432>, if any one of the PEs in the ES doesnt
support this capability of this approach, all PEs can revert back
to the default election algorithm type.”


  *   The IANA section requests the allocation of type value 2 (!). Please do not suggest the use of a value that is registered already in IANA for another algorithm. Please check out: https://www.iana.org/assignments/bgp-extended-communities/bgp-extended-communities.xhtml, DF Alg section.

Overall, while the proposed algorithm may be useful in certain cases, I’m not convinced that another approach is necessary to address issues already handled by HRW—unless HRW is proven ineffective. Additionally, the document overlooks the preference-based DF algorithm, which is widely used in scenarios requiring full determinism and control in DF election.

My two cents..

Thanks.
Jorge



From: Matthew Bocci (Nokia) <matthew.bocci=[e-mail]>
Date: Wednesday, January 22, 2025 at 8:07 AM
To: [e-mail] <[e-mail]>, [e-mail] <[e-mail]>
Subject: [bess] Re: Review request for draft - Efficient service carving in Multi-homed Evpn networks
Hi WG

Just reminder to please take a look at this and provide feedback to the author.

Thanks

Matthew


From: Kiran KT <[e-mail]>
Date: Saturday, 4 January 2025 at 09:25
To: [e-mail] <[e-mail]>
Subject: [bess] Re: Review request for draft - Efficient service carving in Multi-homed Evpn networks
You don't often get email from [e-mail]. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification>


CAUTION: This is an external email. Please be very careful when clicking links or opening attachments. See the URL nok.it/ext for additional information.


Hi BESS Team

The draft discusses approaches on how efficient Service Carving can be achieved in Multi-Homed EVPN networks.
Kindly review and let me know your thoughts/comments on the same.
https://datatracker.ietf.org/doc/draft-kiran-bess-service-carving-evpn-multi-homing/

Kindly note: Draft will expire in the last week of Jan 2025.

Regards
Kiran


On Sun, Oct 20, 2024 at 2:15 AM Kiran KT <[e-mail]<mailto:[e-mail]>> wrote:
Hi BESS Team

Request for reviewing my draft titled -
         Efficient Service-Carving in Evpn Multi-homed Networks.
The same is submitted and available in the link below.
https://datatracker.ietf.org/doc/draft-kiran-bess-service-carving-evpn-multi-homing/

Thanks in advance.

Regards
Kiran

---------- Forwarded message ---------
From: Kiran KT <[e-mail]<mailto:[e-mail]>>
Date: Sun, Aug 25, 2024 at 7:42 PM
Subject: Review request for draft - Efficient service carving in Multi-homed Evpn networks
To: <[e-mail]<mailto:[e-mail]>>
Cc: Kiran KT <[e-mail]<mailto:[e-mail]>>

Hello Team

I have submitted a private draft titled -
          Efficient Service-Carving in Evpn Multi-homed Networks.
The same is submitted and available in the link below.
https://datatracker.ietf.org/doc/draft-kiran-bess-service-carving-evpn-multi-homing/
Request for review and comments.
Thanks in advance.

Regards
Kiran