VLANS

VLAN types 

Normal Range:- 2-1001 ( configurable )
                        1002 - FDDI
                        1003 - Token Ring ( IBM )
                        1004 - FDDI.net
                        1005 - Trnet           
                        1006 - 1023 - Testing                
Extended Range:- 1024-4095    Uses only in L3 Switch   .
Default all ports in VLAN1.   

Vlan configuration two ways :

1.Traditional Method ( Not recommended )

sw#vlan database
sw# vlan 10
sw# apply
This method will directly write to flash.

Default all ports are in Vlan 1.

name of Vlan file in flash  - vlan.dat

To delete Vlan from flash -> delete flash:vlan.dat

If you removed the running config of the router , then VLAN wont be removed
Vlan saves in FLASH , running config saved in NVRAM.

2.New Method

sw(config)      #vlan 10
sw(config-vlan)#name CCNP 

sw#sh vlan brief   Verification command

Multiple Vlan creation using single command

sw(config)# vlan 2-1001

sw(config)#vlan 2,3,4,5,6-10,13-19

port assigning to vlan 
sw(config)#int fa0/1
sw(config-if)#switchport access vlan 2

Multiple interfaces assigning to Vlan

sw(config)#int range fa0/1-24 ( this command does not work in some of the L3 switches , you have to use space after fa 0/1 - 24 )
sw(config-if-range)#switchport access vlan 3