Displaying Vlans; Configuring Vlan Trunks; Trunking Overview - Cisco Catalyst 3750-X Software Configuration Manual

Displaying VLANs

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 15-3
Table 15-3
Command
show interfaces [vlan
vlan-id]
show vlan [id vlan-id]
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:
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Trunking Overview

A trunk is a point-to-point link betweenone or more Ethernet switch inte r faces and another networking device
such as a router or a switch. Ethernet trunks carry the traffic of multiple VLANs over a single link, and you
can extend the VLANs across an entire network.
Two trunking encapsulations are available on all Ethernet interfaces:
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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
15-14
lists the commands for monitoring VLANs.
VLAN Monitoring Commands
Command Mode
Privileged EXEC
Privileged EXEC
Trunking Overview, page 15-14
Encapsulation Types, page 15-16
Default Layer 2 Ethernet Interface VLAN Configuration, page 15-17
Configuring an Ethernet Interface as a Trunk Port, page 15-17
Configuring Trunk Ports for Load Sharing, page 15-22
Inter-Switch Link (ISL)—Cisco-proprietary trunking encapsulation.
IEEE 802.1Q— industry-standard trunking encapsulation.
Chapter 15
Purpose
Display characteristics for all interfaces or for
the specified VLAN configured on the switch.
Display parameters for all VLANs or the
specified VLAN on the switch.
Configuring VLANs
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