With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDHCPServerConflictIPDetectionMethod
Switch DHCP Server Conflict IP Detection Method
1.3.6.1.4.1.171.12.38.3.5.1.2
The server detects conflicts using ping. The client detects conflicts using gratuitous Address Resolution Protocol (ARP).
Back to DHCP-Server-MIB MIB page.
IPHost Network monitor allows you to monitor swDHCPServerConflictIPDetectionMethod on D-Link device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring D-Link VPN routers right now.