Cisco Catalyst 2950 Software Configuration Manual page 352

Configuring VLAN Trunks
In this way, Trunk 1 carries traffic for VLANs 8 through 10, and Trunk 2 carries traffic for VLANs 3
through 6. If the active trunk fails, the trunk with the lower priority takes over and carries the traffic for
all of the VLANs. No duplication of traffic occurs over any trunk port.
Figure 16-3
VLANs 8 – 10 (priority 16)
VLANs 3 – 6 (priority 128)
Beginning in privileged EXEC mode, follow these steps to configure the network shown in
Command
Step 1 configure terminal
Step 2 vtp domain domain-name
Step 3
vtp mode server
Step 4 end
Step 5 show vtp status
Step 6
show vlan
Step 7 configure terminal
Step 8 interface fastethernet 0/1
Step 9 switchport mode trunk
Step 10
end
Step 11 show interfaces fastethernet
0/1switchport
Step 12
Step 13
Step 14
show vlan
Step 15 configure terminal
Step 16
interface fastethernet 0/1
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
16-22
Load Sharing by Using STP Port Priorities
Switch A
Trunk 1
Switch B
Purpose
Enter global configuration mode on Switch 1.
Configure a VTP administrative domain.
The domain name can be from 1 to 32 characters.
Configure Switch 1 as the VTP server.
Return to privileged EXEC mode.
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.
Verify that the VLANs exist in the database on Switch A.
Enter global configuration mode.
Enter interface configuration mode, and define Fast Ethernet port 0/1
as the interface to be configured as a trunk.
Configure the port as a trunk port.
Return to privilege EXEC mode.
Verify the VLAN configuration.
Repeat Steps 7 through 11 on Switch A for Fast Ethernet port 0/2.
Repeat Steps 7 through 11 on Switch B to configure the trunk ports on
Fast Ethernet ports 0/1 and 0/2.
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.
Enter interface configuration mode, and define the interface to set the
STP port priority.
Trunk 2
VLANs 3 – 6 (priority 16)
VLANs 8 – 10 (priority 128)
Chapter 16 Configuring VLANs
Figure 16-3.
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