CLI Reference Guide

762 Spanning Tree Commands
Example
The following example configures a port connected to a host to be least likely
to be selected for forwarding to the root bridge, even if the host begins to
send BPDUs.
console(config-if-Gi1/0/1)#spanning-tree port-priority 240
console(config-if-Gi1/0/1)#spanning-tree vlan 10 port-priority 240
spanning-tree priority
Use the spanning-tree priority command in Global Configuration mode to
configure the spanning-tree priority. The priority value is used to determine
which bridge is elected as the root bridge. To reset the default spanning-tree
priority use the no form of this command.
Syntax
spanning-tree priority priority
no spanning-tree priority
• priority — Priority of the bridge. (Range: 0–61440)
Default Configuration
The default bridge priority for IEEE STP is 32768.
Command Mode
Global Configuration mode
User Guidelines
The priority value must be a multiple of 4096.
The switch with the lowest priority is the root of the spanning tree.
Example
The following example configures spanning-tree priority to 12288.
console(config)#spanning-tree priority 12288
2CSNXXX_SWUM200.book Page 762 Tuesday, December 10, 2013 1:22 PM