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Catalyst 2950 and Catalyst 2955 Switch Command Reference

OL-10102-02

Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands

vlan (VLAN configuration)

• When the no vlan vlan-id ring form is used, the VLAN logical ring number returns to the default

(0).

• When the no vlan vlan-id said form is used, the VLAN SAID returns to the default (100,000 plus

the VLAN ID).

• When the no vlan vlan-id state form is used, the VLAN state returns to the default (active).

• When the no vlan vlan-id stp type form is used, the VLAN spanning-tree type returns to the default

(ieee).

• When the no vlan vlan-id tb-vlan1 or no vlan vlan-id tb-vlan2 form is used, the VLAN

translational bridge VLAN (or VLANs, if applicable) returns to the default (0). Translational bridge

VLANs must be a different VLAN type than the affected VLAN, and if two are specified, the two

must be different VLAN types from each other. A translational bridge VLAN resets to the default if

the translational bridge VLAN is deleted, if the media keyword changes the VLAN type, or if the

media keyword changes the VLAN type of the corresponding translation bridge VLAN.

Examples This example shows how to add an Ethernet VLAN with default media characteristics. The default

includes a vlan-name of VLANxxx, where xxxx represents four numeric digits (including leading zeros)

equal to the VLAN ID number. The default media option is ethernet; the state option is active. The

default said-value variable is 100000 plus the VLAN ID; the mtu-size variable is 1500; the stp-type

option is ieee. When you enter the exit or apply vlan configuration command, the VLAN is added if it

did not already exist; otherwise, this command does nothing.

Switch(vlan)# vlan 2

VLAN 2 added:

Name: VLAN0002

Switch(vlan)# exit

APPLY completed.

Exiting....

This example shows how to modify an existing VLAN by changing its name and MTU size:

Switch(vlan)# no vlan name engineering mtu 1200

You can verify your settings by entering the show vlan privileged EXEC command.

Related Commands Command Description

show vlan Displays the parameters for all configured VLANs or one VLAN (if the VLAN

ID or name is specified) in the administrative domain.

vlan (global

configuration)

Enters config-vlan mode for configuring normal-range and extended-range

VLANs.

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