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Re: [bess] BDF Election in EVPN VPWS Single-Active Multihoming

"Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com> Fri, 22 March 2019 18:15 UTC

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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>
CC: "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] BDF Election in EVPN VPWS Single-Active Multihoming
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Date: Fri, 22 Mar 2019 18:15:38 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/BaLIgjEzbxbsiRw2X1ghqRF2XGg>
Subject: Re: [bess] BDF Election in EVPN VPWS Single-Active Multihoming
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Hi,

Well, everyone has to support the default DF Alg, based on RFC7432. So that one for sure. And in addition there are others that have been implemented. For instance, Pref DF election has been implemented by multiple vendors.
Thanks,
Jorge

________________________________
From: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>
Sent: Friday, March 22, 2019 10:41
To: Rabadan, Jorge (Nokia - US/Mountain View)
Cc: bess@ietf.org
Subject: Re: [bess] BDF Election in EVPN VPWS Single-Active Multihoming

Hi Jorge,

I didn't mean using different algorithms for electing the DF and BFD. I am just asking which algorithm is most widely implemented/used for electing the DF *and* BDF for EVPN VPWS single-active multihoming.

Regards,
Muthu

On Fri, Mar 22, 2019 at 7:47 PM Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mailto:jorge.rabadan@nokia.com>> wrote:
The implementations I know use the same DF Alg for DF election _and_ backup DF Election. And I don’t see why you would use something different?
In other words, if you use e.g., Pref based DF Alg, use it for DF and BDF elections. Only that the BDF election excludes the DF from the candidate list.

Thx
Jorge

From:BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf of Muthu Arul Mozhi Perumal <muthu.arul@gmail.com<mailto:muthu.arul@gmail.com>>
Date: Friday, March 22, 2019 at 4:23 AM
To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>>
Subject: [bess] BDF Election in EVPN VPWS Single-Active Multihoming

While RFC 8214 doesn't recommend any DF election algorithm capable of electing the BDF in EVPN VPWS single-active multihoming for deciding the backup PE, any feedback on what is(are) the widely implemented/supported DF election  algorithm(s) by vendors?

Regards,
Muthu

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