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Allied Telesis AT-8000S Switch
Web Browser Interface User’s Guide
action is taken on traffic. Possible port states are:
– Disabled — Indicates that STP is currently disabled on the port. The port forwards traffic while learning
MAC addresses.
– Blocking — Indicates that the port is currently blocked and cannot forward traffic or learn MAC
addresses. Blocking is displayed when Classic STP is enabled.
• Speed — Indicates the speed at which the port is operating.
• Path Cost — Indicates the port contribution to the root path cost. The path cost is adjusted to a higher or
lower value, and is used to forward traffic when a path is rerouted.
• Priority — Indicates the priority value of the port. The priority value influences the port choice when a bridge
has two ports connected in a loop. The priority value is between 0-240. The priority value is determined in
increments of 16.
• Designated Bridge ID — Indicates the bridge priority and the MAC Address of the designated bridge.
• Designated Port ID — Indicates the selected port priority and interface.
• Designated Cost — Indicates the cost of the port participating in the STP topology. Ports with a lower cost
are less likely to be blocked if STP detects loops.
• Forward Transitions — Indicates the number of times the port has changed from Forwarding state to
Blocking state.
• LAG — Indicates the LAG to which the port belongs.
3. Select the Unit, in the STP Interface Configuration section.
4. Click Modify. The STP Modify Interface Configuration Page opens: