How to delete a VLAN and save VLAN on Cisco 2960

Oct. 29, 2013 - PRLog -- A VLAN is a switched network that is logically segmented by function, project team, or application, without regard to the physical locations of the users.

How to delete a VLAN on Cisco 2960, here, WS-C2960-24TT-L as the example.

Caution： When you delete a VLAN, any ports assigned to that VLAN become inactive. They remain associated with the VLAN (and thus inactive) until you assign them to a new VLAN.

Resume: When you delete a VLAN from a switch that is in VTP server mode, the VLAN is removed from the VLAN database for all switches in the VTP domain. When you delete a VLAN from a switch that is in VTP transparent mode, the VLAN is deleted only on that specific switch. You cannot delete the default VLANs for the different media types: Ethernet VLAN 1 and FDDI or Token Ring VLANs 1002 to 1005.

Beginning in privileged EXEC mode, follow these steps to delete a VLAN on the switch,

The follow are the command and purpose:

Step 1 configure terminal:  Enter global configuration mode.

Step 2 no vlan vlan-id:  Remove the VLAN by entering the VLAN ID.

Step 3 end:  Return to privileged EXEC mode.

Step 4 show vlan brief:  Verify the VLAN removal.

Step 5 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.

Summary: To delete a VLAN by using VLAN database configuration mode, use the vlan database privileged EXEC command to enter VLAN database configuration mode and the no vlan vlan-id VLAN database configuration command.

Saving VLAN Configuration

The configurations of VLAN IDs 1 to 1005 are always saved in the VLAN database (vlan.dat file). If the VTP mode is transparent, they are also saved in the switch running configuration file. You can enter the copy running-config startup-config privileged EXEC command to save the configuration in the startup configuration file. To display the VLAN configuration, enter the show vlan privileged EXEC command.

When you save VLAN and VTP information (including extended-range VLAN configuration information) in the startup configuration file and reboot the switch, the switch configuration is selected as follows:

• If the VTP mode is transparent in the startup configuration, and the VLAN database and the VTP domain name from the VLAN database matches that in the startup configuration file, the VLAN database is ignored (cleared), and the VTP and VLAN configurations in the startup configuration file are used. The VLAN database revision number remains unchanged in the VLAN database.

• If the VTP mode or domain name in the startup configuration does not match the VLAN database, the domain name and VTP mode and configuration for the first 1005 VLANs use the VLAN database information.

• If VTP mode is server, the domain name and VLAN configuration for the first 1005 VLANs use the VLAN database information

WS-C2960-24TT-L: http://www.3anetwork.com/cisco-ws-c2960-24tt-l-price_p4.html

WS-C2960-24TC-L: http://www.3anetwork.com/cisco-ws-c2960-24tc-l-price_p5.html