With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIdslPppoaPerfDiscards
Cisco Idsl Pppoa Performance Discards
1.3.6.1.4.1.9.9.154.1.16.1.5
This object specifies the total number of frames intended for transmission over this PPP session that were discarded for any reason since agent reset.
Back to CISCO-IDSL-LINE-MIB MIB page.
IPHost Network monitor allows you to monitor cIdslPppoaPerfDiscards 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.
