CLI Guide

Layer 2 Switching Commands 820
If an interface is configured with both the spanning-tree vlan vlan-id cost cost
command and the spanning-tree cost cost command, the spanning-tree vlan
vlan-id cost cost value is used in the spanning tree calculation for RSTP, STP,
and MST. Use the spanning-tree vlan cost command to change the cost for
RSTP-PV and STP-PV.
Example
The following example configures the external path cost to be 8192 for
VLANs 12, 13, 24, 25, and 26.
console(config-if-Gi1/0/1)#spanning-tree vlan 12,13,24-26 cost 8192
spanning-tree disable
Use the spanning-tree disable command in Interface Configuration mode to
disable spanning-tree on a specific port. To enable spanning-tree on a port,
use the no form of this command.
Syntax
spanning-tree disable
no spanning-tree disable
Default Configuration
By default, all ports are enabled for spanning-tree.
Command Mode
Interface Configuration (gigabitethernet, port-channel, tengigabitethernet,
fortygigabitethernet) mode
User Guidelines
This command has no user guidelines.
Example
The following example disables spanning-tree on Gi1/0/5.
console(config)#interface gigabitethernet 1/0/5
console(config-if-Gi1/0/5)#spanning-tree disable