With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
docsDevFilterLLCGroup
DOCSIS Device Filter LLC Group
1.3.6.1.2.1.69.3.3.7
A collection of objects to specify link layer filters.
Back to DOCS-CABLE-DEVICE-MIB MIB page.
IPHost Network monitor allows you to monitor docsDevFilterLLCGroup 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.