cisco路由器&三层交换机简单环境配置实例一、网络拓扑图：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