With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2DhcpRelayCtrlEntry
Switch L2 Dhcp Relay Control Entry
1.3.6.1.4.1.171.11.70.5.2.8.7.1
A list of information that specifies the IP address as a destination to forward (relay) DHCP packets to.
Back to DES3552-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2DhcpRelayCtrlEntry 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 access points right now.