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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 11 Configuring VLANs
Displaying VLANs
Use the no uni-vlan VLAN configuration command to return to the default (UNI-ENI isolated VLAN).
Entering uni-vlan isolated command has the same effect as entering the no uni-vlan VLAN
configuration command. The show vlan and show vlan vlan-id privileged EXEC commands also display
UNI-ENI VLAN information, but only UNI-ENI community VLANs appear. To display both isolated
and community VLANs, use the show vlan uni-vlan type command.
Displaying VLANs
Use the show vlan privileged EXEC command to display a list of all VLANs on the switch, including
extended-range VLANs. The display includes VLAN status, ports, and configuration information.
Table 11-3 lists other privileged EXEC commands for monitoring VLANs.
For more details about the show command options and explanations of output fields, see the command
reference for this release.
Configuring VLAN Trunks
These sections contain this conceptual information:
• Trunking Overview, page 11-14
• Default Layer 2 Ethernet Interface VLAN Configuration, page 11-16
• Configuring an Ethernet Interface as a Trunk Port, page 11-16
• Configuring Trunk Ports for Load Sharing, page 11-19

Trunking Overview

A trunk is a point-to-point link between one or more Ethernet switch interfaces and another networking device
such as a router or a switch. Ethernet trunk s carry the traffic of multiple VLANs over a single link, and you
can extend the VLANs across an entire network. The switch supports the IEEE 802.1Q industry-standard
trunking encapsulation.
Tab le 11-3 VLAN Monitoring Commands
Command Purpose
show interfaces [vlan vlan-id]Display characteristics for all interfaces or for the specified
VLAN configured on the switch.
show vlan [id vlan-id]Display parameters for all VLANs or the specified VLAN on the
switch.
show vlan [vlan-name] uni-vlan
type Display UNI-ENI isolated or UNI-ENI community VLANs by
VLAN name.
show vlan uni-vlan Display UNI-ENI community VLANs and associated ports on the
switch.
show vlan uni-vlan type Display UNI-ENI isolated and UNI-ENI community VLANs on
the switch by VLAN ID.