Configuring The Native Vlan For Untagged Traffic; Configuring Trunk Ports For Load Sharing - Cisco 3020 - Catalyst Blade Switch Configuration Manual

Chapter 10 Configuring VLANs
Command
Step 5 show interfaces interface-id switchport Verify your entries in the Pruning VLANs Enabled field of the display.
Step 6 copy running-config startup-config
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.
The native VLAN can be assigned any VLAN ID.
Note
For information about IEEE 802.1Q configuration issues, see the
Considerations" section on page
Beginning in privileged EXEC mode, follow these steps to configure the native VLAN on an
IEEE 802.1Q trunk:
Command
Step 1 configure terminal
Step 2 interface interface-id
Step 3 switchport trunk native vlan vlan-id
Step 4
end
Step 5 show interfaces interface-id switchport
Step 6 copy running-config startup-config
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
Purpose
(Optional) Save your entries in the configuration file.
10-16.
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.
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
Configuring VLAN Trunks
"IEEE 802.1Q Configuration
10-21