With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cDhcpv4CountDropUnknownClient
Cisco Dynamic Host Configuration protocol Count Dropped Unknown Client
1.3.6.1.4.1.9.10.102.1.3.11
The number of DHCP packets dropped due to the server not recognizing or not providing service to the client-id and/or hardware address received in the incoming packet.
Back to CISCO-IETF-DHCP-SERVER-MIB MIB page.
IPHost Network monitor allows you to monitor cDhcpv4CountDropUnknownClient on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.
