Hi Muthu, Yes, the BDF is as per what you have mentioned. https://tools.ietf.org/html/draft-ietf-bess-evpn-df-election-framework-09 formally defines it.
Thanks, --Satya From: BESS <[email protected]> on behalf of Muthu Arul Mozhi Perumal <[email protected]> Date: Friday, March 22, 2019 at 11:41 AM To: "Rabadan, Jorge (Nokia - US/Mountain View)" <[email protected]> Cc: "[email protected]" <[email protected]> Subject: Re: [bess] BDF Election in EVPN VPWS Single-Active Multihoming Thanks, Jorge. Need another clarification. RFC 7432 does not describe how to calculate the BDF for the default DF algo. Though it is straightforward to calculate the BDF by eliminating the DF from the candidate list, would an implementation calculating the BDF that way for the default DF algo interoperate without any problem? Regards, Muthu On Fri, Mar 22, 2019 at 11:45 PM Rabadan, Jorge (Nokia - US/Mountain View) <[email protected]<mailto:[email protected]>> wrote: 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 <[email protected]<mailto:[email protected]>> Sent: Friday, March 22, 2019 10:41 To: Rabadan, Jorge (Nokia - US/Mountain View) Cc: [email protected]<mailto:[email protected]> 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) <[email protected]<mailto:[email protected]>> 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 <[email protected]<mailto:[email protected]>> on behalf of Muthu Arul Mozhi Perumal <[email protected]<mailto:[email protected]>> Date: Friday, March 22, 2019 at 4:23 AM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> 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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