实验：DHCP中继代理 　　所谓DHCP中继，即是跨网段为主机分配IP地址等配置，DHCP Server与DHCP Client处于不同的网段，这时就需要DHCP Relay。    　　一、实验配置拓扑图  　　二、实验配置
R0：interface FastEthernet0/0
 ip address 172.16.1.254 255.255.255.0
 ip helper-address 172.16.3.2
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 172.16.2.1 255.255.255.0
 duplex auto
 speed auto
!
router rip
 version 2
 network 172.16.0.0
! R1：interface FastEthernet0/0
 ip address 172.16.3.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 172.16.2.2 255.255.255.0
 duplex auto
 speed auto
!
router rip
 version 2
 network 172.16.0.0
!