With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDHCPLocalRelayVlanEntry
Switch DHCP Local Relay Vlan Entry
1.3.6.1.4.1.171.12.42.4.2.1
This object lists the current VLANs in the switch and their corresponding DHCP local relay status.
Back to DHCP-RELAY-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swDHCPLocalRelayVlanEntry 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 WiFi routers right now.