VLAN

• A single LAN divided into multiple LANs logically is called VLAN
• Reduce broadcast
• Improve performance
• Improve security (user from one VLAN can’t communicate with other VLAN utill configured routing)

VLAN1

• By default available 
• All the ports are member of VLAN 1 (by default)

S1 (config) # vlan 2
# name sales

S2 (config) # vlan 3                                                         
# name mar

S # show vlan

Port Assign on Vlan

For a single interface:

S1(conf) # int fa 0/1
S1(config-if) # switchport  access  vlan 2
S1 # show vlan

For a range of interfaces:

S1(config)#int range FastEthernet 0/11 – 20                        
S1(config-if-range)#switchport access vlan 2
S1(config-if-range)#do show vlan

Note: we assign ip address to vlan 1 to remotely access it.

# int vlan 1
#ip address 20.0.0.1   255.0.0.0
#no shut