With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alPptpStatsSessionTable
ALTIGA Pptp Statistics Session Table
1.3.6.1.4.1.3076.2.1.2.3.3
List of active sessions within tunnels.
Back to ALTIGA-PPTP-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor alPptpStatsSessionTable 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.