With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swDevInfoTotalNumOfPort
Switch Device Info Total Num Of Port
1.3.6.1.4.1.171.11.70.5.2.1.1.1
The number of ports within this switch. This value is the sum of the ports within this switch.
Back to DGS3650-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swDevInfoTotalNumOfPort 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.