Okay, nevermind! I discovered what was occurring. I was misunderstanding my own configuration. On a remote router I was redistributing IS-IS into OSPF. So, when my local interface--running IS-IS--went down, this triggered an LSA update remotely, which in turn caused the OSPF demand circuit to come up.
The scenario is setup as if the local side will be doing the dialing, but in practice that's just not going to happen because of the topology. With this setup, the remote side will always be the side to bring up the demand circuit even if the triggering event occurs locally. Maybe I should quit for the night and get some sleep. ;-) John ________________________________________________ Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag ---- On Thu, 7 Feb 2002, John Neiberger ([EMAIL PROTECTED]) wrote: > Okay, maybe it doesn't quite qualify as a mystery but it just > occurred to me that I don't know what actually triggers a > demand circuit to come up. I *thought* I did until I ran into > a new scenario tonight that confused me. > > In this scenario, IS-IS and OSPF are running on a router, but > only one interface is participating in OSPF and that is the one > configured as a demand circuit. So, under normal operations > there are no OSPF routes in the routing table, only IS-IS > routes. > > In the usual situation where OSPF is running on multiple > interfaces, I assumed it was some function of OSPF that > triggered the demand circuit to come up. In that situation > there is an interface running OSPF that is aware that the > adjacency went down and that could trigger the demand circuit. > > However, in this case, only IS-IS is running on the main > interface. What is it that actually causes the OSPF demand > circuit to come up? I don't see how it could simply be a > topology change since OSPF isn't aware of the IS-IS topology. > > So, specifically, what is occurring? Perhaps I'm being dense > but I just don't see which mechanism is responsible for this. > > Someone, please put me out of my misery. :-) > > Thanks, > John > > ________________________________________________ > Get your own "800" number > Voicemail, fax, email, and a lot more > http://www.ureach.com/reg/tag [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=34733&t=34732 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
