Spanning Tree Commands 4

spanning-tree port-priority

This command configures the priority for the specified interface. Use the no form to restore the default.

Syntax

spanning-tree port-priority priority no spanning-tree port-priority

priority - The priority for a port. (Range: 0-240, in steps of 16)

Default Setting

128

Command Mode

Interface Configuration (Ethernet Ports 1-8, Port Channel)

Command Usage

•This command defines the priority for the use of a port in the Spanning Tree Algorithm. If the path cost for all ports on a switch are the same, the port with the highest priority (that is, lowest value) will be configured as an active link in the spanning tree.

•Where more than one port is assigned the highest priority, the port with lowest numeric identifier will be enabled.

Example

Console(config)#interface ethernet 1/5

Console(config-if)#spanning-tree port-priority 0

Related Commands

spanning-tree cost (4-160)

spanning-tree edge-port

This command specifies an interface as an edge port. Use the no form to restore the default.

Syntax

[no] spanning-tree edge-port

Default Setting

Disabled

Command Mode

Interface Configuration (Ethernet Ports 1-8, Port Channel)

Command Usage

•You can enable this option if an interface is attached to a LAN segment that is at the end of a bridged LAN or to an end node. Since end nodes cannot cause forwarding loops, they can pass directly through to the spanning tree forwarding state. Specifying Edge Ports provides quicker convergence for

4-161