Load Sharing Using Stp Path Cost - Cisco 3032 Software Configuration Manual

Chapter 13 Configuring VLANs
Command
Step 13
Step 14
Step 15 show vlan
Step 16
configure terminal
Step 17 interface gigabitethernet1/ 0/1
Step 18 spanning-tree vlan 8-10 port-priority 16
Step 19 exit
Step 20
interface gigabitethernet1/ 0/2
Step 21 spanning-tree vlan 3-6 port-priority 16
Step 22
end
Step 23 show running-config
Step 24 copy running-config startup-config

Load Sharing Using STP Path Cost

You can configure parallel trunks to share VLAN traffic by setting different path costs on a trunk and
associating the path costs with different sets of VLANs, blocking different ports for different VLANs.
The VLANs keep the traffic separate and maintain redundancy in the event of a lost link.
In Figure
assigned:
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OL-12247-04
13-5, Trunk ports 1 and 2 are configured as 100BASE-T ports. These VLAN path costs are
VLANs 2 through 4 are assigned a path cost of 30 on Trunk port 1.
VLANs 8 through 10 retain the default 100BASE-T path cost on Trunk port 1 of 19.
VLANs 8 through 10 are assigned a path cost of 30 on Trunk port 2.
VLANs 2 through 4 retain the default 100BASE-T path cost on Trunk port 2 of 19.
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
Purpose
Repeat Steps 7 through 11 on Switch A for a second port in the switch
or switch stack.
Repeat Steps 7 through 11 on Switch B to configure the trunk ports
that connect to the trunk ports configured on Switch A.
When the trunk links come up, VTP passes the VTP and VLAN
information to Switch B. Verify that Switch B has learned the VLAN
configuration.
Enter global configuration mode on Switch A.
Define the interface to set the STP port priority, and enter interface
configuration mode.
Assign the port priority of 16 for VLANs 8 through 10.
Return to global configuration mode.
Define the interface to set the STP port priority, and enter interface
configuration mode.
Assign the port priority of 16 for VLANs 3 through 6.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Configuring VLAN Trunks
13-25