With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ospfNbrIpAddr
ospf Neighbor Ip Address
1.3.6.1.2.1.14.10.1.1
The IP address this neighbor is using in its IP source address. Note that, on addressless links, this will not be 0.0.0.0 but the address of another of the neighbor's interfaces.
Back to OSPF-MIB MIB page.
IPHost Network monitor allows you to monitor ospfNbrIpAddr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.