单臂路由和DHCP集成实验的拓扑图和配置命令行

网络拓扑图比较简单，所以通过文字描述一下就行了：一台交换机连接一台路由器之后，再连接4台PC客户端（PC0到PC3）：

下面是路由器配置的全部命令行：

Current configuration : 1351 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
ip dhcp excluded-address 192.168.20.1
ip dhcp excluded-address 192.168.20.2
ip dhcp excluded-address 192.168.20.4
ip dhcp excluded-address 192.168.20.3
ip dhcp excluded-address 192.168.30.1
ip dhcp excluded-address 192.168.30.2
ip dhcp excluded-address 192.168.30.3
ip dhcp excluded-address 192.168.30.4
!
ip dhcp pool vlan20
network 192.168.20.0 255.255.255.0
default-router 192.168.20.1
dns-server 202.96.134.133
ip dhcp pool vlan30
network 192.168.30.0 255.255.255.0
default-router 192.168.30.1
dns-server 202.96.134.133
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.1
encapsulation dot1Q 20
ip address 192.168.30.1 255.255.255.0
!
interface FastEthernet0/0.2
encapsulation dot1Q 30
ip address 192.168.20.1 255.255.255.0
!
interface FastEthernet1/0
no ip address
duplex auto
speed auto
shutdown
!
interface Serial2/0
no ip address
clock rate 2000000
shutdown
!
interface Serial3/0
no ip address
clock rate 2000000
shutdown
!
interface FastEthernet4/0
no ip address
shutdown
!
interface FastEthernet5/0
no ip address
shutdown
!
ip classless
!
line con 0
line vty 0 4
login
!
end
交换机配置：
Current configuration : 1260 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec