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•Root Path Cost — The cost of the path from this bridge to the root.

•Topology Changes Counts — Specifies the total amount of STP state changes that have occurred.

•Last Topology Change — Indicates the amount of time that has elapsed since the bridge was initialized or reset, and the last topographic change occurred. The time is displayed in a D/H/M/S format, for example, 2D/5H/10M/4S.

Defining STP Global Parameters

1Open the page.

2Select Enable in the Spanning Tree State field.

3Select the STP mode in the STP Operation Mode field, and define the bridge settings.

4Click Apply Changes.

STP is enabled on the device.

Modifying STP Global Parameters

1Open the page.

2Define the fields in the dialog.

3Click Apply Changes.

The STP parameters are modified, and the device is updated.

Defining STP Global Parameters Using CLI Commands

The following table summarizes the equivalent CLI commands for defining STP global parameters as displayed in the Spanning Tree Global Settings page.

Table 7-19. STP Global Parameter CLI Commands

CLI Command	Description
spanning-tree	Enables spanning tree functionality.
spanning-tree mode {stp rstp mstp}	Configures the mode of the spanning tree protocol.
spanning-tree priority priority	Configures the spanning tree priority.
spanning-tree hello-time seconds	Configures the spanning tree bridge Hello Time, which is how
	often the device broadcasts Hello messages to other devices.
spanning-tree max-age seconds	Configures the spanning tree bridge maximum age.
spanning-tree forward-time seconds	Configures the spanning tree bridge forward time, which is the
	amount of time a port remains in the listening and learning
	states before entering the forwarding state.

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Configuring Switch Information