Spanning Tree Port Table

The Spanning Tree Port table is to edit the port states and parameters for STP managed ports, and display the port current status

The Spanning Tree Port Table has the following sub-menus/commands:

• Port — Indicates the port number to which the STP applies.

• Priority — Indicates the port priority value. The Priority value can be used to influence the choice of port when a bridge has two ports connected in a loop.

• PortState — Indicates the port current STP state. If enabled Port State determines what forwarding action is taken on traffic. If the bridge discovers a malfunctioning port, the port is placed in the Broken State. The possible values are:

• Disabled — STP is currently disabled on the port. The port forwards traffic while learning MAC addresses.

• Blocking — The port is currently blocked and cannot be used to forward traffic or learn MAC addresses.

• Listening — The port is currently in the listening mode. The port cannot forward traffic nor can it learn MAC addresses.

• Learning — The port is currently in the learning mode. The port cannot forward traffic however it can learn new MAC addresses.

• Forwarding — The port is currently in the forwarding mode. The port can forward traffic and learn new MAC addresses.

• Broken — The port is currently malfunctioning and cannot be used for forwarding traffic.

• Port Enable — Indicates if the STP is enabled on the port. If the port is disabled, the Port State is forwarding.

• Path Cost — The amount this port contributes to the Root Path Cost. The Path Cost can be adjustable to a higher or lower value, and can be used to forward traffic towards or away from a path being rerouted.

• Designated Root — The Designated Bridge transmits a unique Bridge Identifier as the root in the CMs.

• Designated Cost — The Designated Port path cost of network segments connected to this port.  This value is compared to the Root Path Cost field in received CMs.

• Designated Bridge — Identifies which bridge is the designated bridge for the port.

• Port Designated Port — Identifies the port on the designated bridge.

• Forward Transitions — Indicates the number of times the port has gone from a learning state to a forwarding state.

Edit Spanning Tree Port Table Entry

To edit an Spanning Tree Port Table entry:

1. Click  . The Spanning Tree Port Table Edit window is displayed.

2. Edit the required table entry fields and click  . The Spanning Tree Port Table window is displayed.

3. Click  . When the Status field displays “Finished!”, the fields are confirmed as modified.