With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
vcVlanEntryMacLimit
vc Vlan Entry Mac Limit
1.3.6.1.4.1.3646.1300.2.11.1.1.5
The maximum number of MAC associated to the VCL link. The total number of MAC associated to VCL links of one port can not over 8. This attribute only applies to bridged mode VC, if the VC is routed mode, the mac limit will always be 1.
Back to ASKEY-DSLAM-VC-VLAN-MIB MIB page.
IPHost Network monitor allows you to monitor vcVlanEntryMacLimit 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.