With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
docsDiagLogCurrentSize
docs Diag Log Current Size
The total number of Cable Modem entries reported in the docsDiagLogTable. The maximum value possible will be docsDiagLogMaxSize.
Back to DOCS-DIAG-MIB MIB page.
IPHost Network monitor allows you to monitor docsDiagLogCurrentSize 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.