HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP So - Page 259
Configuring the Native VLAN for Untagged Traffic, Configuring Trunk Ports for Load Sharing
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Chapter 10 Configuring VLANs Configuring VLAN Trunks Step 5 Step 6 Command Purpose show interfaces interface-id switchport Verify your entries in the Pruning VLANs Enabled field of the display. copy running-config startup-config (Optional) Save your entries in the configuration file. To return to the default pruning-eligible list of all VLANs, use the no switchport trunk pruning vlan interface configuration command. Configuring the Native VLAN for Untagged Traffic A trunk port configured with IEEE 802.1Q tagging can receive both tagged and untagged traffic. By default, the switch forwards untagged traffic in the native VLAN configured for the port. The native VLAN is VLAN 1 by default. Note The native VLAN can be assigned any VLAN ID. For information about IEEE 802.1Q configuration issues, see the "IEEE 802.1Q Configuration Considerations" section on page 10-16. Beginning in privileged EXEC mode, follow these steps to configure the native VLAN on an IEEE 802.1Q trunk: Step 1 Step 2 Command configure terminal interface interface-id Step 3 switchport trunk native vlan vlan-id Step 4 Step 5 Step 6 end show interfaces interface-id switchport copy running-config startup-config Purpose Enter global configuration mode. Define the interface that is configured as the IEEE 802.1Q trunk, and enter interface configuration mode. Configure the VLAN that is sending and receiving untagged traffic on the trunk port. For vlan-id, the range is 1 to 4094. Return to privileged EXEC mode. Verify your entries in the Trunking Native Mode VLAN field. (Optional) Save your entries in the configuration file. To return to the default native VLAN, VLAN 1, use the no switchport trunk native vlan interface configuration command. If a packet has a VLAN ID that is the same as the outgoing port native VLAN ID, the packet is sent untagged; otherwise, the switch sends the packet with a tag. Configuring Trunk Ports for Load Sharing Load sharing divides the bandwidth supplied by parallel trunks connecting switches. To avoid loops, STP normally blocks all but one parallel link between switches. Using load sharing, you divide the traffic between the links according to which VLAN the traffic belongs. OL-8915-01 Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide 10-21
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