With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
askeyRstpAdminStatus
askey Rstp Admin Status
1.3.6.1.4.1.3646.1300.2.1.17.1
Setting this object to enable (1) enables RSTP Protocol. Setting it to disable (2) disables RSTP Protocol.
Back to ASKEY-RSTP-ENABLE-MIB MIB page.
IPHost Network monitor allows you to monitor askeyRstpAdminStatus 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 switches right now.