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Catalyst 2360 Switch Software Configuration Guide
OL-19808-01
Chapter 9 Configuring VLANs
Configuring VLAN Trunks
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.
, Trunk ports 1 and 2 are configured as 100BASE-T ports. These VLAN path costs are
assigned:
•
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.
Step 6
show vlan
Verify that the VLANs exist in the database on Switch A.
Step 7
configure terminal
Enter global configuration mode.
Step 8
interface gigabitethernet 0/1
Define the interface to be configured as a trunk, and enter interface
configuration mode.
Step 9
switchport mode trunk
Configure the port as a trunk port.
Note
The Catalyst 2360 switch supports only IEEE 802.1q
trunking.
Step 10
end
Return to privileged EXEC mode.
Step 11
show interfaces gigabitethernet 0/1
switchport
Verify the VLAN configuration.
Step 12
Repeat Steps 7 through 11on Switch A for a second port in the switch.
Step 13
Repeat Steps 7 through 11on Switch B to configure the trunk ports
that connect to the trunk ports configured on Switch A.
Step 14
show vlan
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.
Step 15
configure terminal
Enter global configuration mode on Switch A.
Step 16
interface gigabitethernet 0/1
Define the interface to set the STP port priority, and enter interface
configuration mode.
Step 17
spanning-tree vlan 8-10 port-priority 16
Assign the port priority of 16 for VLANs 8 through 10.
Step 18
exit
Return to global configuration mode.
Step 19
interface gigabitethernet0/2
Define the interface to set the STP port priority, and enter interface
configuration mode.
Step 20
spanning-tree vlan 3-6 port-priority 16
Assign the port priority of 16 for VLANs 3 through 6.
Step 21
end
Return to privileged EXEC mode.
Step 22
show running-config
Verify your entries.
Step 23
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Command
Purpose