With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdaiVlanForwarded
Cisco Dynamic ARP Inspection Vlan Forwarded
1.3.6.1.4.1.9.9.374.1.4.1.1.2
This object indicates the number of ARP packets forwarded by Dynamic Arp Inspection feature.
Back to CISCO-DYNAMIC-ARP-INSPECTION-MIB MIB page.
IPHost Network monitor allows you to monitor cdaiVlanForwarded 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.