With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdaiIfConfigTable
Cisco Dynamic ARP Inspection If Config Table
1.3.6.1.4.1.9.9.374.1.3.1
A table provides the mechanism to configure the trust state for Dynamic ARP Inspection purpose at each physical interface capable of this feature. Some of the interfaces (but not limited to) for which this feature might be applicable are: ifType = ethernetCsmacd(6).
Back to CISCO-DYNAMIC-ARP-INSPECTION-MIB MIB page.
IPHost Network monitor allows you to monitor cdaiIfConfigTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.