With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmlrResultSsn
Cisco Multi-layer Routing Result Ssn
1.3.6.1.4.1.9.9.396.1.9.1.6
The subsystem number to be inserted into MSU. This object only has applies when the cmlrResultType has the 'pcSsn' value. Otherwise, this object will return zero value.
Back to CISCO-ITP-MLR-MIB MIB page.
IPHost Network monitor allows you to monitor cmlrResultSsn 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.