VLAN VTP ( VLAN Trunking Protocol )
ip 192.168.1.1 255.255.255.0
ip 192.168.1.2 255.255.255.0
switchport mode access
switchport access vlan 10
switchport mode access
switchport access vlan 20
switchport mode access
switchport access vlan 10
switchport mode access
switchport access vlan 20
ip 192.168.1.3 255.255.255.0
ip 192.168.1.4 255.255.255.0
switchport mode access
switchport access vlan 10
switchport mode access
switchport access vlan 20