With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
Switch L2 Device Alarm Topology Change
This object determines whether or not to send a trap message when the switch topology changes. If the object is enabled(3), the topologyChange trap is sent by the device when any of its configured ports transitions from the Learning state to the Forwarding state, or from the Forwarding state to the Blocking state. For the same port transition, the device does not send the trap if this object value is disabled or other.
Back to DES3552-L2MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor swL2DevAlarmTopologyChange on D-Link device via the SNMP protocol.
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Easy monitoring of swL2DevAlarmTopologyChange with IPHost tools