In this article we will discuss Creating a VLANs, will make brief discussion on Creating a VLAN, In last article we discuss about VLAN Ranges on Catalyst Switches.
When configuring normal range VLANs, the configuration details are stored in flash memory on the switch, in a file called vlan.dat. Flash memory is persistent and does not require the copy running-config startup-config command.
However, because other details are often configured on a Cisco switch at the same time that VLANs are created, it is good practice to save running configuration changes to the startup configuration.
The Cisco IOS command syntax used to add a VLAN to a switch and give it a name. Naming each VLAN is considered a best practice in switch configuration.
Create a VLAN and use the show vlan brief command to display the contents of the vlan.dat file.
In addition to entering a single VLAN ID, a series of VLAN IDs can be entered separated by commas, or a range of VLAN IDs separated by hyphens using the vlan vlan-id command. For example, use the following command to create VLANs 100, 102, 105, 106, and 107:
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