SW1,SW2
conf t
no vlan 333
int range fa0/20 - 24
switchport trunk allow vlan 1-332,334-665,667-4094
int fa0/19
sitchport access vlan 666
switchport mode do1q-tunnel
l2protocol-tunnel cdp
no cdp enable
no switchport trunk native vlan 999
no switchport mode nonegotiate
SW3,SW4
conf t
no vlan 666
int range fa0/20 - 24
switchport trunk allow vlan 1-332,334-665,667-4094
int fa0/19
switchport trunk allow 333
Sw3
int vlan 333
ip address 10.10.33.8 255.255.255.255.0
Sw4
int vlan 33
ip address 10.10.33.9 255.255.255.0