D-Link DGS-3024 Manual page 59

Max Age
Forward Delay
Last Topology Change
Topology Changes
Count
DGS-3024 Gigabit Ethernet Switch Manual
The Max Age may be set to ensure that old information does not endlessly circulate
through redundant paths in the network, preventing the effective propagation of the
new information. Set by the Root Bridge, this value will aid in determining that the
Switch has spanning tree configuration values consistent with other devices on the
bridged LAN. If the value ages out and a BPDU has still not been received from the
Root Bridge, the Switch will start sending its own BPDU to all other Switches for
permission to become the Root Bridge. If it turns out that your Switch has the lowest
Bridge Identifier, it will become the Root Bridge. The user may choose a time
between 6 and 40 seconds. The default value is 20.
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.
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