With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDHCPRelayVlanCtrlVlanRangeList193to256
Switch DHCP Relay Vlan Control Vlan Range List193to256
1.3.6.1.4.1.171.12.42.3.5.1.5
This object indicates the VLAN range (1537-2048) that added the specific server.
Back to DHCP-RELAY-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swDHCPRelayVlanCtrlVlanRangeList193to256 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.
