Thanks for all the info, I was being a dumb a**. I was thinking that the BDR would not know that the DR went down (because the loopback was always up). I then remembered the hello packets. Thats what determines when an interface is truely down or not (not sending hello packets). Thanks again though.
cc ""bt"" wrote in message news:[EMAIL PROTECTED].; > not directly related to electing DR/BDR, but i use loopbacks for management. > it's the ip i associate in my hosts file for ssh access. also with > loopbacks i can control the ip for easier troubleshooting since i use a > numbering scheme where the 2nd octet indicates which physical location the > router is in and the 3rd octet is what kind of function it serves (core vs > distribution vs access); makes it a hell of a lot easier when viewing the > ospf database and i wouldn't have this luxury otherwise. > > luckily we don't have many ospf routers attached to ethernet links, though > we do have a lot of sites spread out, so this is a fairly scalable way for > me to control which router is a DR. > > bt > > ""Steven A. Ridder"" wrote in message > news:[EMAIL PROTECTED].; > | You can have a better numbering/identificaton process if you use loopback > | numbers, rather than some arbitraty IP. > | > | -- > | > | RFC 1149 Compliant. > | > | > | ""cclark"" wrote in message > | news:[EMAIL PROTECTED].; > | > In determining DR and BDR, OSPF will use the priority and the Router ID. > I > | > can change the Router ID by creating a loopback with a higher ID (IP > | address > | > right?). Why would I do this? Why would I not just change the priority > of > | > the router in question? If I want a specific router to be the DR, why > not > | > set it with a priority of 1 and set all the other routers to something > | like > | > 5? TIA. > | > > | > cc > | > | > | > | > | Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36804&t=36641 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
