Hey Chuck, I don't know how this slipped past me ;-> You are correct. Not only is RtrB configured the same as RtrC, but the solution only allows the hub/spoke to form adjacencies. This is one of the many reasons why routes are in the OSPF database but NOT in the routing table. I'm not sure if all he wanted to show was the effect of different Hello parameters. Interesting that the only corrections on the Ciscopress site are the ones I sent to Bill. You should send him this as well, in case he hasn't yet noticed this issue.
Elmer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of The Long and Winding Road Sent: Sunday, March 16, 2003 1:14 AM To: [EMAIL PROTECTED] Subject: OSPF Topology Question - Parkhurst's Book [7:65532] Ran into something in Parkhurst's OSPF book while studying tonight. Looking for validation of my observation. The example: OSPF over frame relay The topology: hub and spoke, with a twist. The hub uses subinterfaces ( one to each spoke router ) and the spokes use physical interfaces. Now, the Parkhurst examples show leaving the physical interfaces as ospf type non-broadcast, change the ospf timers on the subinterfaces, place neighbor statements on the spoke routers ( physical interfaces ) and all is well. Except I don't believe it works this way. The subinterfaces are point-to-point networks, and expect the other side to be a point-to-point connection and adjacency. the physical interfaces are non-broadcast, and expect DR elections to occur, something the router with the subinterfaces will not do. I believe the correct solution is to make the physical interfaces ospf type point-to-multipoint. An alternative is to change the physical interfaces to ospf point-to-point. In any case - can anyone else verify what I see and do not see - that Parkhurst chapter 11, example 3, pages 275-279 answer is incomplete? thanks. -- TANSTAAFL "there ain't no such thing as a free lunch" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65557&t=65532 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
