With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDHCPLocalRelayGlobalState
Switch DHCP Local Relay Global State
1.3.6.1.4.1.171.12.42.4.1
This object indicates the state of the DHCP local relay function of the switch.
Back to DHCP-RELAY-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swDHCPLocalRelayGlobalState 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.