With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccsFlapMacAddr
Cisco Cable Spectrum Flap Mac Address
1.3.6.1.4.1.9.9.114.1.1.5.1.1
MAC address of the Cable Modem's Cable interface which identifies a flap-list entry for a flapping Cable Modem.
Back to CISCO-CABLE-SPECTRUM-MIB MIB page.
IPHost Network monitor allows you to monitor ccsFlapMacAddr 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.