With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dsx3PlcpLssCodeRxLinkUp
dsx3 Plcp Lss Code Rx Link Up
1.3.6.1.4.1.351.110.4.4.2.2.1.1.7
This object defines the value of the LSS code that is to be interpreted as Receive Link Up.
Back to CISCO-MGX82XX-DSX3-MIB MIB page.
IPHost Network monitor allows you to monitor dsx3PlcpLssCodeRxLinkUp on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.