Changing The Path Cost; Changing The Port Priority - Cisco WS-C2955T-12 Software Manual

Chapter 6 Configuring the System

Changing the Path Cost

Beginning in privileged EXEC mode, follow these steps to change the path cost for STP calculations.
The STP command applies to the stp-list.
Command
Step 1 configure terminal
Step 2
interface interface
Step 3
spanning-tree [vlan stp-list] cost
cost
Step 4 end
Step 5
show running-config

Changing the Port Priority

Beginning in privileged EXEC mode, follow these steps to change the port priority, which is used when
two switches tie for position as the root switch. The stp-list is the list of VLANs to which the STP
command applies.
Command
Step 1
configure terminal
Step 2
interface interface
Step 3 spanning-tree [vlan stp-list]
port-priority port-priority
Step 4
end
Step 5
show running-config
78-6511-08
Purpose
Enter global configuration mode.
Enter interface configuration mode, and enter the port to be configured.
Configure the path cost for the specified spanning-tree instance.
Enter a number from 1 to 65535.
Return to privileged EXEC mode.
Verify your entry.
Purpose
Enter global configuration mode.
Enter interface configuration mode, and enter the port to be configured.
Configure the port priority for a specified instance of STP.
Enter a number from 0 to 255. The lower the number, the higher the priority.
Return to privileged EXEC mode.
Verify your entry.
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
Configuring STP
6-45