With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ospfNbrRtrId
ospf Neighbor Rtr Id
1.3.6.1.2.1.14.10.1.3
A 32-bit integer (represented as a type IpAddress) uniquely identifying the neighboring router in the Autonomous System.
Back to OSPF-MIB MIB page.
IPHost Network monitor allows you to monitor ospfNbrRtrId on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.