LSW1：
sy
sy sw1
vlan batch 10 20
int g0/0/4
port link-type access
port default vlan 10
int g0/0/3
port link-type access
port default vlan 20
int g0/0/1
port link-type trunk
port trunk allow-pass vlan all
int g0/0/2
port link-type trunk
port trunk allow-pass vlan all
int vlan 10
ip address 192.168.1.254 24
un sh
int vlan 20
ip address 192.168.2.254 24
un sh
LSW2：
sy
sy sw2
vlan batch 10 20
int g0/0/2
port link-type access
port default vlan 10
int g0/0/3
port link-type access
port default vlan 20
int g0/0/1
port link-type trunk
port trunk allow-pass vlan all
LSW3：
sy
sy sw3
vlan batch 10 20
int g0/0/2
port link-type access
port default vlan 10
int g0/0/3
port link-type access
port default vlan 20
int g0/0/1
port link-type trunk
port trunk allow-pass vlan all