With IPHost Network Monitor you can run simple snmp requests against a NETGEAR device in your network.
agentSwitchMFDBFilteringPortMask
agent Switch MFDB Filtering Port Mask
1.3.6.1.4.1.4526.10.1.2.8.10.1.1.7
BitMask indicating which ports this entry indicates should be filtered. To obtain port numbers from interface numbers, use the objects agentPortDot1dBasePort and agentPortIfIndex in the agentPortConfigTable table.
Back to NETGEAR-SWITCHING-MIB MIB page.
IPHost Network monitor allows you to monitor agentSwitchMFDBFilteringPortMask on NETGEAR device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring NETGEAR switches right now.