System information

3-77
Spanning Tree Commands
3
Example
spanning-tree port-priority
Use this command to configure 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, 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 the
lowest numeric identifier will be enabled.
Example
Related Commands
spanning-tree cost (3-76)
spanning-tree portfast
Use this command to set an interface to fast forwarding. Use the no form to disable
fast forwarding.
Syntax
spanning-tree portfast
no spanning-tree portfast
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree cost 50
Console(config-if)#
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree port-priority 0
Console(config-if)#