需求描述

RT1作为DHCP服务器创建两个全局地址池：192.168.10.0/24

192.168.20.0/24

RT1和RT3属于VLAN 10

RT2属于VLAN 20

在交换机上配置DHCP中继，确保RT2和RT3都能从RT1处获取IP地址

 

1、交换机上创建两个vlan

vlan 10vlan 20

2、给vlan 配置上IP地址，作为RT1、RT2、RT3的网关interface Vlan-interface10ip address 192.168.10.1 255.255.255.0#interface Vlan-interface20ip address 192.168.20.1 255.255.255.0

3、把接口加入相应的VLANinterface Ethernet0/4/0port link-mode bridgeport access vlan 10#interface Ethernet0/4/1port link-mode bridgeport access vlan 10#interface Ethernet0/4/2port link-mode bridgeport access vlan 20#

4、配置RT1，配置IP地址和默认网关[RT1]int gi 0/0/0[RT1-GigabitEthernet0/0/0]ip add 192.168.10.2 255.255.255.0[RT1-GigabitEthernet0/0/0]qu[RT1]ip route-static 0.0.0.0 0.0.0.0 192.168.10.1

5、配置两个全局地址池启动DHCP服务dhcp enable

第一个全局地址池#dhcp server ip-pool vlan10network 192.168.10.0 mask 255.255.255.0gateway-list 192.168.10.1dns-list 202.106.0.20 8.8.8.8#

第二个全局地址池#dhcp server ip-pool vlan20network 192.168.20.0 mask 255.255.255.0gateway-list 192.168.20.1dns-list 114.123.11.8 202.106.0.20#

6、配置DHCP中继中继配置服务端的出口方向，客户端的入口方向如果客户端连接在路由器的Ge-0/0/1口上，则在Ge-0/0/1上做中继如果客户端连接在属于VLAN 20的接口上，则在VLAN20上做中继

交换机上也开启DHCPdhcp enable指定DHCP服务器的地址（192.168.10.2）dhcp relay server-group 1 ip 192.168.10.2#interface Vlan-interface20ip address 192.168.20.1 255.255.255.0dhcp select relaydhcp relay client-detect enabledhcp relay server-select 1#7、客户端配置和验证ip add dhcp-allocdis ip int br