二、配置命令： 
1、路由器的配置： 
interface FastEthernet0/0 
ip address 10.66.88.222 255.255.255.0 
ip nat outside 
duplex auto 
speed auto 
interface FastEthernet0/1 
ip address 192.168.1.1 255.255.255.0 
ip nat inside 
duplex auto 
speed auto 
interface Vlan1 
no ip address 
shutdown 
ip nat inside source list 1 interface FastEthernet0/0 overload 
ip classless 
ip route 192.168.2.0 255.255.255.0 192.168.1.222 
ip route 192.168.3.0 255.255.255.0 192.168.1.222 
access-list 1 permit 192.168.0.0 0.0.255.255 
三、三层交换机的配置： 
hostname L3-SW 
ip dhcp pool vlan2pool 
network 192.168.3.0 255.255.255.0 
default-router 192.168.3.1 
dns-server 202.101.172.35 
ip dhcp pool vlan1pool 
network 192.168.2.0 255.255.255.0 
default-router 192.168.2.1 
dns-server 202.101.172.35 
interface FastEthernet0/1 
no switchport 
ip address 192.168.1.222 255.255.255.0 
duplex auto 
speed auto 
interface FastEthernet0/2 
switchport mode trunk 
interface FastEthernet0/5 
switchport mode trunk 
interface Vlan1 
ip address 192.168.2.1 255.255.255.0 
interface Vlan2 
ip address 192.168.3.1 255.255.255.0 
ip classless 
ip route 0.0.0.0 0.0.0.0 192.168.1.1 
四、二层交换机的配置： 
1、switch0的配置： 
hostname sw0 
interface FastEthernet0/1 
switchport mode trunk 
interface FastEthernet0/2 
switchport mode access 
2、switch1的配置： 
hostname sw1 
interface FastEthernet0/1 
switchport mode trunk 
interface FastEthernet0/2 
switchport access vlan 2 
switchport mode access