Allied Telesis AT-8100L/8POE, User Manual

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AT-8100 Series Version 2.2.5.0 Web Interface User’s Guide
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
Hello Time — Enter the hello time in seconds. The hello time is the
frequency that the switch sends bridge protocol data units
(BPDUs), which contain spanning tree configuration information.
The range is 1 to 10 seconds.
This value is active only when the switch is acting as the root
bridge of the spanning tree domain. Switches that are not acting as
the root bridge use a dynamic value supplied by the root bridge.

Forward Delay — Enter the forward delay time in seconds. The
forward delay specifies how long the ports remain in the listening
and learning or discarding states before they transition to the
forwarding state. The range is 4 to 30 seconds.
This value is active only when the switch is acting as the root
bridge of the spanning tree domain. Switches that are not acting as
the root bridge use a dynamic value supplied by the root bridge.

Max Age — Enter the max age in seconds. The max age
determines how long BPDUs are stored by the switch before they
are deleted. The default setting is 20 seconds. The range is 6 to 40
seconds.
This value is active only when the switch is acting as the root
bridge of the spanning tree domain. Switches that are not acting as
the root bridge use a dynamic value supplied by the root bridge.

BPDU Guard — Enable or disable the BPDU guard feature on the
switch. When the BPDU guard feature is enabled on the switch, the
switch monitors edge ports and disables them if they receive
BPDU packets.
3. Click Apply .
4. Click SAVE to save your changes to the startup configuration file.