"Decides not to forward the LSA" When could this happen? I am thinking that this means like in a DR/BDR situation where the only routers sending to ALLSPFROUters are the DR and BDR, so the neighbors need to ackknowledge specifically as they are not flooding? Does that seem right?
On Thu, Jun 3, 2010 at 12:06 PM, Tyson Scott <[email protected]> wrote: > That is a great question. Doyle is the man so I am going to hope this is > helpful. > > > > Explicit acknowledgements are required anytime the router decides not to > forward the LSA as part of the flooding procedure. > > The article that I found that states this is RFC 5449 on OSPFv3 but I think > the same principle applies > > It is found in Section 5.4.2 Paragraph 3 sub-paragraph 2. > > > > Regards, > > > > Tyson Scott - CCIE #13513 R&S, Security, and SP > > Managing Partner / Sr. Instructor - IPexpert, Inc. > > Mailto: [email protected] > > Telephone: +1.810.326.1444, ext. 208 > > Live Assistance, Please visit: www.ipexpert.com/chat > > eFax: +1.810.454.0130 > > > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco > CCIE (R&S, Voice, Security & Service Provider) certification(s) with > training locations throughout the United States, Europe, South Asia and > Australia. Be sure to visit our online communities at > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Joshua Yost > *Sent:* Thursday, June 03, 2010 11:31 AM > *To:* ccie_rs > *Subject:* [OSL | CCIE_RS] OSPF Acknowledgements > > > > When/How are implicit acknowledgements of LSAs done as opposed to Explicit > Acknowledgements? Per Doyle, implicit is we just send a copy of the LSA back > to the originating neighbor in an update. Explicit would be direct or > delayed Link State Acknowledgement. It is explained when direct vs delayed > is used, but not explained when implict vs explicit is used. > >
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