With IPHost Network Monitor you can run simple snmp requests against a NETGEAR device in your network.
agentDiffServClassRuleMatchSrcMacMask
agent Diff Server Class Rule Match Source Mac Mask
1.3.6.1.4.1.4526.10.3.7.2.3.1.22
Source MAC address mask match value for the class - only valid if the agentDiffServClassRuleMatchEntryType is set to srcmac(13). This mask value identifies the portion of agentDiffServClassRuleMatchSrcMacAddr that is compared against a packet. A non-contiguous mask value is permitted.
Back to NETGEAR-QOS-DIFFSERV-PRIVATE-MIB MIB page.
IPHost Network monitor allows you to monitor agentDiffServClassRuleMatchSrcMacMask on NETGEAR device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring NETGEAR cable modems right now.