Hi Satya, Thanks for your response..
I see no harm in stating explicitly how the BDF is to be calculated for the default DF election algorithm. I however agree that it can't be generalized for all future DF election algorithms, so it is better described on a per algorithm basis.. Regards, Muthu On Thu, Mar 28, 2019 at 12:17 AM Satya Mohanty (satyamoh) < [email protected]> wrote: > Hi Muthu, > > > > As you mentioned it is straightforward to calculate the BDF in the default > DF Algorithm by taking the current DF out of reckoning. > > It is my personal view that since this is self-evident it need not be > explicitly stated. > > But I will let others decide. > > > > > > Thanks, > > --Satya > > > > *From: *Muthu Arul Mozhi Perumal <[email protected]> > *Date: *Monday, March 25, 2019 at 8:22 AM > *To: *"Satya Mohanty (satyamoh)" <[email protected]> > *Cc: *"Rabadan, Jorge (Nokia - US/Mountain View)" <[email protected]>, > "[email protected]" <[email protected]> > *Subject: *Re: [bess] BDF Election in EVPN VPWS Single-Active Multihoming > > > > Hi Satya, > > > > draft-ietf-bess-evpn-df-election-framework also does not describe how the > BDF is to be calculated for the default DF election algo. Am I missing > something? > > > > I think my question still holds: > > 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 election algo interoperate without any problem? > > > > Would it be better to update draft-ietf-bess-evpn-df-election-framework on > how the BDF is to be calculated in general for any DF election algo > (including the default DF election algo)? > > [Satya] IMHO opinion, much as it appears obvious, we cannot say for > certain that in every future DF algorithm (that may come into existence), > the BDF computation will always be as simple as taking the current DF (PE) > out of reckoning and doing the recomputation. > > > > Regards, > > Muthu > > > > Best, > > --Satya > > > > On Sat, Mar 23, 2019 at 2:46 AM Satya Mohanty (satyamoh) < > [email protected]> wrote: > > 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]> 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]> > *Sent:* Friday, March 22, 2019 10:41 > *To:* Rabadan, Jorge (Nokia - US/Mountain View) > *Cc:* [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]> 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]> on behalf of Muthu Arul Mozhi Perumal > <[email protected]> > *Date: *Friday, March 22, 2019 at 4:23 AM > *To: *"[email protected]" <[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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