All of you, thanks for the answers. This routing exam cert. guide is a pretty good book, although I haven't read the BGP and IS-IS sections yet. But the OSPF section needs some corrections indeed . Anyway, I think I will follow Priscilla's advise to buy Doyle's routing book, because now I have around six books (a/o ICND, DCN and CID related books) that all cover fractions of routing, but not the full story. Moreover, sometimes they are in contradiction.
Eric ----- Original Message ----- From: "Priscilla Oppenheimer" To: Sent: Wednesday, January 22, 2003 11:21 PM Subject: RE: Wrong definition type 4 summary LSA for ASBRs [7:61615] > ericbrouwers wrote: > > > > Hi, > > > > For those that are reading Cisco Press' CCNP Routing Exam > > Certification Guide: > > there is a very confusing definition of type 4 summary LSAs on > > page 292, > > chapter 6: > > > > The AS external ASBR summary link- This LSA is sent to a router > > that connects > > to the outside world (ASBR). It is sent from the Area Border > > Router to the > > Autonomous System Boundary Router. The LSA contains the metric > > cost from the > > ABR to the ASBR. This is identified as a Type 4 LSA. > > > > In my opinion this is wrong, isn't it? Or maybe I'm missing > > something? > > > > My understanding is that a type 4 summary LSA is originated by > > ABRs.It is sent > > into an area by the ABR to advertise the AS boundary routers. > > > > Could someone confirm my understanding? > > Yup, I have the same comment penciled into my copy of the book. > > Bottom line: don't even bother trying to learn OSPF from that book. It's a > disaster. (It's a pretty good book otherwise, I think?) > > Read "Routing TCP/IP" by Doyle. You'll want to get that book anyway if you > haven't already It's terrific for real-world and certs. > > _______________________________ > > Priscilla Oppenheimer > www.troubleshootingnetworks.com > www.priscilla.com > > > > Eric Brouwers Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61710&t=61615 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
