With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cermResOwnerResUserCount
Cisco Embedded Resource Manager Resource Owner Resource User Count
1.3.6.1.4.1.9.9.510.1.2.1.1.6
This object indicates the number of resource users which consume resources from the resource owner.
Back to CISCO-ERM-MIB MIB page.
IPHost Network monitor allows you to monitor cermResOwnerResUserCount on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.