Chapter 13 Configuring VLANs

Configuring Normal-Range VLANs

VLAN Configuration Mode Options

You can configure normal-range VLANs (with VLAN IDs 1 to 1005) by using these two configuration modes:

VLAN Configuration in config-vlan Mode, page 13-7

You access config-vlan mode by entering the vlan vlan-idglobal configuration command.

VLAN Configuration in VLAN Database Configuration Mode, page 13-7

You access VLAN database configuration mode by entering the vlan database privileged EXEC command.

VLAN Configuration in config-vlan Mode

To access config-vlan mode, enter the vlan global configuration command with a VLAN ID. Enter a new VLAN ID to create a VLAN, or enter an existing VLAN ID to modify that VLAN. You can use the default VLAN configuration (Table 13-2) or enter multiple commands to configure the VLAN. For more information about commands available in this mode, see the vlan global configuration command description in the command reference for this release. When you have finished the configuration, you must exit config-vlan mode for the configuration to take effect. To display the VLAN configuration, enter the show vlan privileged EXEC command.

You must use this config-vlan mode when creating extended-range VLANs (VLAN IDs greater than 1005). See the “Configuring Extended-Range VLANs” section on page 13-12.

VLAN Configuration in VLAN Database Configuration Mode

To access VLAN database configuration mode, enter the vlan database privileged EXEC command. Then enter the vlan command with a new VLAN ID to create a VLAN, or enter an existing VLAN ID to modify the VLAN. You can use the default VLAN configuration (Table 13-2) or enter multiple commands to configure the VLAN. For more information about keywords available in this mode, see the vlan VLAN database configuration command description in the command reference for this release. When you have finished the configuration, you must enter apply or exit for the configuration to take effect. When you enter the exit command, it applies all commands and updates the VLAN database. VTP messages are sent to other switches in the VTP domain, and the privileged EXEC mode prompt appears.

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-configstartup-configprivileged EXEC command to save the configuration in the startup configuration file. In a switch stack, the whole stack uses the same vlan.dat file and running configuration. To display the VLAN configuration, enter the show vlan privileged EXEC command.

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

 

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Cisco Systems 3750E Vlan Configuration Mode Options, Saving Vlan Configuration, Vlan Configuration in config-vlan Mode