With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ospfv3AreaAggregatePrefixLength
ospfv3 Area Aggregate Prefix Length
1.3.6.1.3.102.1.12.1.6
The length of the prefix (in bits). A prefix can not be shorter than 3 bits.
Back to OSPFV3-MIB MIB page.
IPHost Network monitor allows you to monitor ospfv3AreaAggregatePrefixLength 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.