With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
srpMACRejectPktsByDestFlag
srp MAC Reject Packets By Dest Flag
1.3.6.1.4.1.9.10.60.1.6.1.11
Indicates that packets are to be rejected for a particular destination address.
Back to CISCO-SRP-MIB MIB page.
IPHost Network monitor allows you to monitor srpMACRejectPktsByDestFlag 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.