在sw1,sw2上做eth-trunk
[sw1]int Eth-Trunk 0
[sw1]int g0/0/2
[sw1-GigabitEthernet0/0/2]eth-trunk 0
[sw1]int g0/0/3
[sw1-GigabitEthernet0/0/3]eth-trunk 0
[sw2]int Eth-Trunk 0
[sw2]int g0/0/2
[sw2-GigabitEthernet0/0/2]eth-trunk 0
[sw2]int g0/0/3
[sw2-GigabitEthernet0/0/3]eth-trunk 0
创建VLAN
[sw1]vlan 2
在eth-trunk 0,g0/0/4,g0/0/5上做trunk
[sw1]port-group group-member g0/0/4 to g0/0/5 Eth-Trunk 0
[sw1-port-group]port link-type trunk
[sw1-port-group]port trunk allow-pass vlan 2
[sw2]vlan 2
[sw2]port-group group-member g0/0/6 to g0/0/7 Eth-Trunk 0
[sw2-port-group]port link-type trunk
[sw2-port-group]port trunk allow-pass vlan 2
划分VLAN，将g0/0/2放在VLAN2
[sw3]vlan 2
[sw3]int g0/0/2
[sw3-GigabitEthernet0/0/2]port link-type access
[sw3-GigabitEthernet0/0/2]port default vlan 2
在g0/0/4,g0/0/7上做trunk
[sw3]port-group group-member g0/0/4 g0/0/7
[sw3-port-group]port link-type trunk
[sw3-port-group]port trunk allow-pass vlan 2
划分VLAN，将g0/0/2放在VLAN2
[sw4]vlan 2
[sw4]int g0/0/2
[sw4-GigabitEthernet0/0/2]port link-type access
[sw4-GigabitEthernet0/0/2]port default vlan 2
在g0/0/5,g0/0/6上做trunk
[sw4]port-group group-member g0/0/5 to g0/0/6
[sw4-port-group]port link-type trunk
[sw4-port-group]port trunk allow-pass vlan 2