Aijun -
Please look at https://tools.ietf.org/html/draft-ietf-lsr-dynamic-flooding-02#section-6.4 which defines how to disable dynamic flooding w/o resigning as Area Leader. Note that having deployed dynamic flooding in a network which functions poorly in its absence, disabling dynamic flooding has risks. Nonetheless, I agree we need a way to disable dynamic flooding and it is helpful to be able to do so w/o altering what all possible area leader candidates are advertising - and we have that. Les > -----Original Message----- > From: Lsr <lsr-boun...@ietf.org> On Behalf Of Aijun Wang > Sent: Tuesday, May 28, 2019 6:44 PM > To: Peter Psenak (ppsenak) <ppse...@cisco.com>; 'Tony Li' > <tony1ath...@gmail.com>; 'Robert Raszuk' <rob...@raszuk.net> > Cc: lsr@ietf.org > Subject: [Lsr] 答复: 答复: Option B from "Migration between normal flooding > and flooding reduction" > > Hi, Peter: > > Under the current mechanism, only all the candidate area leaders stop > advertise this sub-TLV, then the network will be back to normal flooding? > Is it more efficient that only one area leader indicates(according to the > command from NMS) explicitly then the network will be back to normal > flooding? > > For the number of candidate area leaders, I support we should have more > than one for consideration of redundancy. > > -----邮件原件----- > 发件人: Peter Psenak [mailto:ppse...@cisco.com] > 发送时间: 2019年5月28日 15:34 > 收件人: Aijun Wang; 'Tony Li'; 'Robert Raszuk' > 抄送: lsr@ietf.org > 主题: Re: [Lsr] 答复: Option B from "Migration between normal flooding and > flooding reduction" > > Aijun, > > On 28/05/2019 08:15, Aijun Wang wrote: > > Hi, Tony: > > > > How the receiver judge the leader has stopped advertising the Area Leader > sub-TLV? Do you need some timers? > > no timer needed, all event driven. Area Leader sub-TLV is removed from the > LSP. > > thanks, > Peter > > >>From the current discussion, I think the explicit instruction that proposed > by Huaimo is more acceptable. > > > > > > Best Regards. > > > > Aijun Wang > > Network R&D and Operation Support Department China Telecom > Corporation > > Limited Beijing Research Institute,Beijing, China. > > > > -----邮件原件----- > > 发件人: Tony Li [mailto:tony1ath...@gmail.com] > > 发送时间: 2019年5月27日 12:20 > > 收件人: Robert Raszuk > > 抄送: lsr@ietf.org > > 主题: Re: [Lsr] Option B from "Migration between normal flooding and > flooding reduction" > > > > > > Hi Robert, > > > >> The current draft is pretty robust in terms of area leader election. It > >> also > says that "Any node that is capable MAY advertise its eligibility to become > Area Leader” > > > > > > Correct. This can be all systems. It can be one. For redundancy, a few > would be sensible. > > > > > >> With that can you confirm the procedure to "resign" as area leader ? > > > > > > Stop advertising the Area Leader sub-TLV. It’s that simple. > > > > > >> Especially that under those circumstances just having active area leader to > resign clearly is not enough to change given flooding scheme. > > > > > > If there are multiple potential area leaders, then all of them would have to > resign. > > > > > >> In some deployments all eligible nodes may advertise such capability > which in turn the "resign" procedure would require NMS action to disable > such capability by configuration and re-flooding it. Not that I am advocating > it > nor see need for complex migration procedures, but just would like to better > understand the "resign" part. > > > > > > Correct, this is rightfully an NMS operation. > > > > Tony > > > > _______________________________________________ > > Lsr mailing list > > Lsr@ietf.org > > https://www.ietf.org/mailman/listinfo/lsr > > > > _______________________________________________ > > Lsr mailing list > > Lsr@ietf.org > > https://www.ietf.org/mailman/listinfo/lsr > > > > > > _______________________________________________ > Lsr mailing list > Lsr@ietf.org > https://www.ietf.org/mailman/listinfo/lsr _______________________________________________ Lsr mailing list Lsr@ietf.org https://www.ietf.org/mailman/listinfo/lsr
