From: Eugene Ward (eward15@juno.com)
Date: Tue Feb 07 2006 - 15:04:39 GMT-3
"Is it correct to say that there will be no new election taking place so routerA will not become the DR again (no ip ospf priority preempt?)"
Yes.
"I would like the stability of the network (routing database) to be routerA for DR and routerB for BDR becuase these two routers have more CPU processing cycles as oppose to the remaining 2 routers."
You could use "ip ospf priority 0" on the other two routers to keep them out of the DR election process, leaving routerA and routerB as the only two routers capable of being the DR. As far as routerA always being the DR, that may not be possible if the interface bounces and routerB is waiting in the wings.
HTH,
Eugene
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I am wondering about the OSPF DR and BDR election process. Let's say I
have a broadcast segment consisting of four routers. I configure routerA with an ip ospf priority of 255, routerB has an ip ospf priority of 250, and the remaining two routers have a default ip ospf priority of 1. So routerA is the DR and routerB is the BDR. A link failure causes routerA to enter interface down state, which in turns causes routerB to now become the DR. A new election will take place and the two remaining routers having the same ip ospf priority of 1, will now use the highest router ID to become the BDR. Moments later, the interface for routerA comes back up. Is it correct to say that there will be no new election taking place so routerA will not become the DR again (no ip ospf priority preempt?) I would like the stability of
the network (routing database) to be routerA for DR and routerB for BDR
becuase these two routers have more CPU processing cycles as oppose to the remaining 2 routers.
I have searched through last years emails to see if there was anything on this topic so that there isn't any overlap, but I couldn't find anything there. I have also looked at RFC 2328, cisco.com/univercd, and numerous Cisco Press CCIE books to no avail. I would appreciate any help with this question.
Jeremiah Redden (J.R.)
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