Switch# configure Terminal
Switch(config)#interface FastEthernet0/01
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 20
Luego verifica si la interface FastEthernet0/01 ya se encuentra en la VLAN 20 con el siguiente comando.
Switch#sh vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5
Fa0/6, Fa0/7, Fa0/8, Fa0/9
Fa0/10, Fa0/11, Fa0/12, Fa0/13
Fa0/14, Fa0/15, Fa0/16, Fa0/17
Fa0/18, Fa0/19, Fa0/20, Fa0/21
Fa0/22, Fa0/23, Fa0/24, Gig1/1
Gig1/2
20 ADMINISTRACION active Fa0/1 (puerto agregado a la VLAN 20)
30 CONTABILIDAD active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
Switch#
