Cisco Systems 3750E manual Creating or Modifying an Ethernet Vlan, Remote-span, 13-9

Chapter 13 Configuring VLANs

Configuring Normal-Range VLANs

Creating or Modifying an Ethernet VLAN

Each Ethernet VLAN in the VLAN database has a unique, 4-digit ID that can be a number from 1 to 1001. VLAN IDs 1002 to 1005 are reserved for Token Ring and FDDI VLANs. To create a normal-range VLAN to be added to the VLAN database, assign a number and name to the VLAN.

Note When the switch is in VTP transparent mode, you can assign VLAN IDs greater than 1006, but they are not added to the VLAN database. See the “Configuring Extended-Range VLANs” section on

page 13-12.

For the list of default parameters that are assigned when you add a VLAN, see the “Configuring Normal-Range VLANs” section on page 13-4.

Beginning in privileged EXEC mode, follow these steps to use config-vlan mode to create or modify an Ethernet VLAN:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	vlan vlan-id	Enter a VLAN ID, and enter config-vlan mode. Enter a new VLAN ID
		to create a VLAN, or enter an existing VLAN ID to modify that VLAN.
		Note The available VLAN ID range for this command is 1 to 4094.
		For information about adding VLAN IDs greater than 1005
		(extended-range VLANs), see the “Configuring
		Extended-Range VLANs” section on page 13-12.
Step 3
	name vlan-name	(Optional) Enter a name for the VLAN. If no name is entered for the
		VLAN, the default is to append the vlan-idwith leading zeros to the
		word VLAN. For example, VLAN0004 is a default VLAN name for
		VLAN 4.
Step 4
	mtu mtu-size	(Optional) Change the MTU size (or other VLAN characteristic).
Step 5
	remote-span	(Optional) Configure the VLAN as the RSPAN VLAN for a remote
		SPAN session. For more information on remote SPAN, see Chapter 30,
		“Configuring SPAN and RSPAN.”
Step 6
	end	Return to privileged EXEC mode.
Step 7 show vlan {name vlan-name id vlan-id}		Verify your entries.
Step 8
	copy running-config startup config	(Optional) If the switch is in VTP transparent mode, the VLAN
		configuration is saved in the running configuration file as well as in the
		VLAN database. This saves the configuration in the switch startup
		configuration file.

To return the VLAN name to the default settings, use the no name, no mtu, or no remote-spanconfig-vlan commands.

This example shows how to use config-vlan mode to create Ethernet VLAN 20, name it test20, and add it to the VLAN database:

Switch# configure terminal

Switch(config)# vlan 20

Switch(config-vlan)# name test20

Switch(config-vlan)# end

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-02 13-9