+1 to what Acee has said. As historical context, the SA bit was defined in IS-IS precisely because IS-IS adjacency state machine does NOT include LSPDB sync as a requirement before the adjacency is usable (unlike OSPF). OSPF does not need SA bit.
Les > -----Original Message----- > From: Lsr <[email protected]> On Behalf Of Acee Lindem > Sent: Monday, March 6, 2023 8:01 AM > To: Liyan Gong <[email protected]> > Cc: lsr <[email protected]> > Subject: Re: [Lsr] New Version Notification for draft-cheng-ospf-adjacency- > suppress-00.txt > > Hi Liyan, > > I should replied to this Email rather than your request for an IETF 116 slot. > Please reply to this one. > > I’m sorry but I don’t get this draft from a quick read. An OSPF router would > not advertise an adjacency until the router is in FULL state. An OSPF router > will not attain FULL state until database synchronization is complete. > The following statement from you use case is incorrect: > > So, without requesting the starting router to update its LSAs, the > neighbors of the starting router may transition to "Full" state and > route the traffic through the starting router. > > Why do you think you need this extension? > > > Thanks, > Acee > > > > On Mar 6, 2023, at 9:10 AM, Liyan Gong <[email protected]> > wrote: > > > > Dear All, > > We have posted a new draft https://datatracker.ietf.org/doc/draft-cheng- > ospf-adjacency-suppress/. > > This draft describes the extension of OSPF LLS to signal adjacency > suppression which is functionally similar to the SA bit of Restart TLV in > IS-IS. > > The purpose is to avoid the temporary blackhole when a router restarts > from unplanned outages. > > We are looing forward to your comments.Thanks a lot. > > > > Best Regards, > > Liyan > > > > ----邮件原文---- > > 发件人：internet-drafts <[email protected]> > > 收件人：Changwang Lin <[email protected]>,Liyan Gong > <[email protected]>,Mengxiao Chen > <[email protected]>,Weiqiang Cheng > <[email protected]> > > 抄 送: (无) > > 发送时间：2023-03-06 17:43:39 > > 主题：New Version Notification for draft-cheng-ospf-adjacency-suppress- > 00.txt > > > > > > A new version of I-D, draft-cheng-ospf-adjacency-suppress-00.txt > > has been successfully submitted by Mengxiao Chen and posted to the > > IETF repository. > > > > Name: draft-cheng-ospf-adjacency-suppress > > Revision: 00 > > Title: OSPF Adjacency Suppression > > Document date: 2023-03-06 > > Group: Individual Submission > > Pages: 8 > > URL: https://www.ietf.org/archive/id/draft-cheng-ospf-adjacency- > suppress-00.txt > > Status: https://datatracker.ietf.org/doc/draft-cheng-ospf-adjacency- > suppress/ > > Htmlized: https://datatracker.ietf.org/doc/html/draft-cheng-ospf- > adjacency-suppress > > > > > > Abstract: > > This document describes a mechanism for a router to signal its > > neighbors to suppress advertising the adjacency to it until link- > > state database synchronization is complete. This minimizes transient > > routing disruption when a router restarts from unplanned outages. > > > > > > > > > > The IETF Secretariat > > > > > > > > Subject：New Version Notification for draft-cheng-ospf-adjacency- > suppress-00.txt > > > > > > A new version of I-D, draft-cheng-ospf-adjacency-suppress-00.txt > > has been successfully submitted by Mengxiao Chen and posted to the > > IETF repository. > > > > Name: draft-cheng-ospf-adjacency-suppress > > Revision: 00 > > Title: OSPF Adjacency Suppression > > Document date: 2023-03-06 > > Group: Individual Submission > > Pages: 8 > > URL: https://www.ietf.org/archive/id/draft-cheng-ospf-adjacency- > suppress-00.txt > > Status: https://datatracker.ietf.org/doc/draft-cheng-ospf-adjacency- > suppress/ > > Htmlized: https://datatracker.ietf.org/doc/html/draft-cheng-ospf- > adjacency-suppress > > > > > > Abstract: > > This document describes a mechanism for a router to signal its > > neighbors to suppress advertising the adjacency to it until link- > > state database synchronization is complete. This minimizes transient > > routing disruption when a router restarts from unplanned outages. > > > > > > > > > > The IETF Secretariat > > > > > > > > _______________________________________________ > > Lsr mailing list > > [email protected] > > https://www.ietf.org/mailman/listinfo/lsr > > _______________________________________________ > Lsr mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/lsr _______________________________________________ Lsr mailing list [email protected] https://www.ietf.org/mailman/listinfo/lsr
