With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
agentGratuitousARPSendDupIpDetectedState
agent Gratuitous ARP Send Dup Ip Detected State
1.3.6.1.4.1.171.12.1.2.12.2.2
This is used to enable/disable sending of gratuitous ARP request packets while a duplicate IP is detected. By default, the state is enabled. The duplicate IP detected means that the system received an ARP request packet that was sent by an IP address that matches the system's own IP address. In this case, the system knows that somebody out there is using an IP address that is in conflict with the system. In order to reclaim the correct host of this IP address, the system can send out the gratuitous ARP request packet for this duplicate IP address.
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IPHost Network monitor allows you to monitor agentGratuitousARPSendDupIpDetectedState 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 routers right now.