Re: OSPF inter-area learned routes [7:22268]

I sketched your network and it made me wonder if the path you think is "shortest" really is shortest. To get to the C routers in Area 2, the Area 1 A routers have four possible paths: 1. A1---T3---B1---B2---T3---C2 2. A1---T3---B1---T1---C1 3. A2---T1---B2---T3---C2 4. A2---T1---B2---B1---T1--

Re: OSPF inter-area learned routes [7:22268]

OSPF (Open Shortest Path First) calculates the shortest path to area 0 first, then the shortest path to the next area boundary via intra-area routes. The best illustration of this was in the Networkers 2000 CCIE Power Session presentation http://www.ieng.com/networkers/nw00/pres/3304/3304_c1_sec2

Re: [Re: [OSPF inter-area learned routes [7:22268]

Sorry, I meant to say that I would have expected B2's cost to be 3 not 2. Curtis Call wrote: > Are you sure that the B1 Network Summary LSA had a lower cost then the B2 > Summary LSA? According to how I understood your topology, B1 should advertise > a cost of 65 to reach network C and B2 shoul

Re: [OSPF inter-area learned routes [7:22268]

Are you sure that the B1 Network Summary LSA had a lower cost then the B2 Summary LSA? According to how I understood your topology, B1 should advertise a cost of 65 to reach network C and B2 should advertise a cost of 2. So they should both use the T1 link to B2 to exit the area. The reason for