With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cPppoeSystemCurrSessions
Cisco Pppoe System Curr Sessions
1.3.6.1.4.1.9.9.194.1.1.1
The current number of active PPPoE sessions within this system.
Back to CISCO-PPPOE-MIB MIB page.
IPHost Network monitor allows you to monitor cPppoeSystemCurrSessions 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.