enable
conf terminal
vlan 10
name reguA
exit
vlan 20
name reguB
exit
show vlan
configure terminal
int fa0/1
switchport access vlan 10
exit
int fa0/2
switchport access vlan 10
exit
int fa0/3
switchport access vlan 10
exit
int fa0/4
switchport access vlan 20
exit
int fa0/5
switchport access vlan 20
exit
int fa0/6
switchport access vlan 20
exit
int fa0/10
switchport mode trunk