With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cPppoeSystemMaxAllowedSessions
Cisco Pppoe System Max Allowed Sessions
1.3.6.1.4.1.9.9.194.1.1.3
Maximum number of allowed PPPoE sessions within the system.
Back to CISCO-PPPOE-MIB MIB page.
IPHost Network monitor allows you to monitor cPppoeSystemMaxAllowedSessions on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.