With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dsx3PlcpCounterValidEntries
dsx3 Plcp Counter Valid Entries
1.3.6.1.4.1.351.110.4.4.2.4.2
The maximum number of entries in the dsx3PlcpCounterTable.
Back to CISCO-MGX82XX-DSX3-MIB MIB page.
IPHost Network monitor allows you to monitor dsx3PlcpCounterValidEntries on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.