With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ospfv3VirtNbrRtrId
ospfv3 Virtual Neighbor Rtr Id
1.3.6.1.3.102.1.11.1.2
A 32-bit integer uniquely identifying the neighboring router in the Autonomous System.
Back to OSPFV3-MIB MIB page.
IPHost Network monitor allows you to monitor ospfv3VirtNbrRtrId on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.