implementing OSPF Configuration on Cisco ISR 4331 - Routes Not Being Advertised
I'm running into a question with OSPF on a Cisco ISR 4331 router. I have configured OSPF to advertise several networks, but the routes do not seem to be propagating to other routers in the OSPF area. Here are the key parts of my configuration: ```plaintext router ospf 1 network 192.168.1.0 0.0.0.255 area 0 network 10.0.0.0 0.255.255.255 area 1 ``` I've verified that the interfaces are up and that they are part of the correct OSPF area. However, when I check the OSPF neighbors with the command `show ip ospf neighbor`, I see that my router is not establishing adjacency with the neighboring routers. I also ran `show ip route ospf` and the expected networks are not listed. I checked the following: - All involved interfaces have OSPF enabled with the correct subnet masks. - OSPF hello and dead intervals are matched across neighbors. - No access lists that might be blocking OSPF multicast traffic. Interestingly, I noticed that when I do a `debug ip ospf events`, I receive messages indicating that there are mismatched network types between my router and an adjacent router. Both routers are set to use the default broadcast network type, but one of them is a Cisco 3750 and the other is a Cisco ISR 4451. It seems odd that they would not establish an OSPF adjacency due to network type, as they are both in the same broadcast medium (VLAN). I also tried changing the OSPF network type on my ISR 4331 to point-to-point, but still, the scenario continues. Any suggestions on what could be causing this scenario or additional commands I can run to further debug the question? Thanks! What's the best practice here? What's the correct way to implement this?