With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
modulePortStatus
module Port Status
1.3.6.1.4.1.9.5.1.3.1.1.15
about the module and each of the ports on the module. The first byte contains the status for the module (same value as moduleStatus), and subsequent bytes contain status for the first through the last ports on the module (same value as portOperStatus).
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor modulePortStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.