Elmer, You make a good point here:
> Also, studying the CCNP exams using CCIE level material will make it > much easier to review for the written exam. At least that's what I did. > > HTH, > Elmer When I was studying CCNA, CCDA and CID a couple of months ago, I was very annoyed by the overlap in the different books I used. Probably I would have been better off using one or two good resources that are also useful for later CCNP/CCIE study. Eric ----- Original Message ----- From: "cebuano" To: "'ericbrouwers'" Sent: Thursday, January 23, 2003 12:44 AM Subject: RE: OSPF 30 minutes topology table exchange [7:61617] > Eric, > I see you've been digging deep into your studies. > First, OSPF sends Database Description Packets which contain only the > LSA HEADERS - NOT the entire database, to describe the contents of their > OSPF LSA Database to their neighbors. This is probably what the author > is referring to. The neighbor will then send a Link State Request to > keep its own OSPF Topology synchronized. > > My recommendation is to read Doyle Vol.1 to get a more precise coverage > of this protocol. The RFC is not only dry, but it does NOT contain the > Cisco-specific implementation which you will be asked in the exam. > > As far as errors in the book, this should not affect your answer in the > exam because from what I remember, the exam is very straight-forward. > Also, studying the CCNP exams using CCIE level material will make it > much easier to review for the written exam. At least that's what I did. > > HTH, > Elmer > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of > ericbrouwers > Sent: Wednesday, January 22, 2003 4:50 PM > To: [EMAIL PROTECTED] > Subject: OSPF 30 minutes topology table exchange [7:61617] > > Hello, > > Again for those reading Cisco Press' CCNP Routing Exam Certification > Guide. > > It's not clear to me how often the OSPF topology table is exchanged by > default. I thought this happened every 30 minutes, regardless of other > recent > updates. The cert. guide is not consistent about this: > > Page 166: > "...Although OSPF sends the entire table every 30 minutes after the last > update, this is far less demanding of network resources than the older > protocol, RIP. ..." > Page 172: > " ... However, 30 minutes after the last update was received, a > compressed > version of the table is propagated. ..." > Page 185: > "... OSPF will send summary information every 30 minutes, regardless of > whether incremental updates have been sent in that time..." > Page 186: > "...Involves updates sent as required (when changes are seen) and every > 30 > minutes after no change has been seen..." > Page 216: > "... synchronized, incremental updates will be sent to the neighbors as > soon > as a change is perceived, as well as every 30 minutes...." > Page 288: > "...The topology table is exchanged between adjacent routers at least > every > 30 > minutes..." > > Maybe one of the OSPF gurus knows this by heart, saving me some RFC > reading > and CCO searching time? > > Thanks, > > Eric Brouwers. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61713&t=61617 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
