HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP So - Page 261
Load Sharing Using STP Path Cost, show interfaces gigabitethernet 0/1
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Chapter 10 Configuring VLANs Configuring VLAN Trunks Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Step 14 Step 15 Step 16 Step 17 Step 18 Step 19 Step 20 Step 21 Step 22 Step 23 Step 24 Command show vlan configure terminal interface gigabitethernet 0/1 switchport trunk encapsulation {isl | dot1q | negotiate} switchport mode trunk end show interfaces gigabitethernet 0/1 switchport show vlan configure terminal interface gigabitethernet 0/1 spanning-tree vlan 8-10 port-priority 16 exit interface gigabitethernet0/2 spanning-tree vlan 3-6 port-priority 16 end show running-config copy running-config startup-config Purpose Verify that the VLANs exist in the database on Switch A. Enter global configuration mode. Define the interface to be configured as a trunk, and enter interface configuration mode. Configure the port to support ISL or IEEE 802.1Q encapsulation or to negotiate with the neighboring interface. You must configure each end of the link with the same encapsulation type. Configure the port as a trunk port. Return to privileged EXEC mode. Verify the VLAN configuration. Repeat Steps 7 through 11 on Switch A for a second port in the switch. 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. 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 10-4, 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. OL-8915-01 Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide 10-23
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