With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciiSummAddrExistState
Cisco IS-IS Summ Address Exist State
1.3.6.1.4.1.9.10.118.1.1.5.1.4
The existence state of this summary address. This object follows the row status behavior.
Back to CISCO-IETF-ISIS-MIB MIB page.
IPHost Network monitor allows you to monitor ciiSummAddrExistState 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.