Cisco CATALYST 2960

13-21
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
OL-26520-01
Chapter 13 Configuring VLANs
Configuring VLAN Trunks
Note If your switch is a member of a switch stack, you must use the spanning-tree [vlan vlan-id] cost cost
interface configuration command instead of the spanning-tree [vlan vlan-id] port-priority priority
interface configuration command to select an interface to put in the forwarding state. Assign lower cost
values to interfaces that you want selected first and higher cost values that you want selected last. For
more information, see the “Load Sharing Using STP Path Cost” section on page 13-22.
Stacking is supported only on Catalyst 2960-S switches running the LAN base image.
Beginning in privileged EXEC mode, follow these steps to configure the network shown in Figure 13-2.
Command Purpose
Step 1
configure terminal Enter global configuration mode on Switch A.
Step 2
vtp domain domain-name Configure a VTP administrative domain.
The domain name can be 1 to 32 characters.
Step 3
vtp mode server Configure Switch A as the VTP server.
Step 4
end Return to privileged EXEC mode.
Step 5
show vtp status Verify the VTP configuration on both Switch A and Switch B.
In the display, check the VTP Operating Mode and the VTP Domain
Name fields.
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 interface-id_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.
Step 10
end Return to privileged EXEC mode.
Step 11
show interfaces interface-id_1 switchport Verify the VLAN configuration.
Step 12
Repeat Steps 7 through 10 on Switch A for a second port in the switch
stack.
Step 13
Repeat Steps 7 through 10 on 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 interface-id_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 interface-id_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.