D-Link DGS-3024 - Switch Manual page 62

Forward Delay
Last Topology Change
Topology Changes
Count
DGS-3024 Gigabit Ethernet Switch Manual
The Forward Delay can be from 4 to 30 seconds. Any port on the Switch spends this time
in the listening state while moving from the blocking state to the forwarding state.
This field shows the time, in seconds, since the last spanning tree topology change.
This field displays the number of times that the spanning tree topology has changed since
the original initial boot up of the Switch.
48