With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swL2MirrorPortState
Switch L2 Mirror Port State
1.3.6.1.4.1.171.11.70.5.2.10.4
This object indicates the port mirroring state. other(1) - this entry is currently in use but the conditions under which it will remain so are different from each of the following values. disabled(2) - After writing this value to the object, the corresponding entry will be removed from the table. enabled(3) - This entry resides in the table.
Back to DGS3200-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2MirrorPortState 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 routers right now.