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Cisco Systems Intelligent Gigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
24R9746
Chapter 12 Configuring VLANs
Configuring VLAN Trunks
Figure 12-3 Load Sharing by Using STP Port Priorities
Beginning in privileged EXEC mode, follow these steps to configure the network shown in Figure 12-3.
92413
Switch 1
BladeCenter
Trunk 2
VLANs 3 – 6 (priority 10)
VLANs 8 – 10 (priority 128)
Trunk 1
VLANs 8 – 10 (priority 10)
VLANs 3 – 6 (priority 128)
Command Purpose
Step 1
configure terminal Enter global configuration mode on Switch 1.
Step 2
vtp domain domain-name Configure a VTP administrative domain.
The domain name can be from 1 to 32 characters.
Step 3
vtp mode server Configure Switch 1 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 gigabitethernet0/17 Enter interface configuration mode, and define Gigabit Ethernet
port 0/17 as the interface to be configured as a trunk.
Step 9
switchport mode trunk Configure the port as a trunk port.
Step 10
end Return to privilege EXEC mode.
Step 11
show interfaces gigabitethernet0/17
switchport
Verify the VLAN configuration.
Step 12
Repeat Steps 7 through 11 on Switch A for Gigabit Ethernet port 0/18.
Step 13
Repeat Steps 7 through 11 on Switch B to configure the trunk ports on
Gigabit Ethernet ports 0/17 and 0/18.
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 gigabitethernet0/17 Enter interface configuration mode, and define the interface to set the
STP port priority.
Step 17
spanning-tree vlan 8-10 port-priority 16 Assign the port priority of 16 for VLANs 8 through 10.
Step 18
spanning-tree vlan 10 port-priority 16 Assign the port priority of 16 for VLAN 10.