DHCP 在實際應用中比較廣泛，今天將配置DHCP思路及過程寫下來。大家相互學習！

1、實驗拓撲及描述：以AR1作為DHCP伺服器，三層交換機（LSW1)作為DHCP中繼裝置，建立兩個介面組將它們接入到不同的vlan,在vlanif10和vlanif20配置兩個網段的閘道器，且使能DHCP中繼,使用rip協議互通。

G0/0/2--G0/0/10介面劃分到VLAN 10,G0/0/11--G0/0/19介面劃分到VLAN20

DHCP伺服器AR1配置

<Huawei>sys

[Huawei]undo info en

[Huawei]sysname AR1

[AR1]dhcp enable

[AR1]ip pool vlan10

[AR1-ip-pool-vlan10]gateway-list 192.168.10.254

[AR1-ip-pool-vlan10]network 192.168.10.0 mask 24

[AR1-ip-pool-vlan10]q

[AR1-ip-pool-vlan20]gateway-list 192.168.20.254

[AR1-ip-pool-vlan20]network 192.168.20.0 mask 24

[AR1-ip-pool-vlan20]q

[AR1]int g0/0/0

[AR1-GigabitEthernet0/0/0]ip address 192.168.30.2 24

[AR1-GigabitEthernet0/0/0]dhcp select global

[AR1-GigabitEthernet0/0/0]q

[AR1]rip

[AR1-rip-1]version 2

[AR1-rip-1]network 192.168.30.0

[AR1-rip-1]q

交換機配置

<Huawei>sys

[Huawei]undo info en

[Huawei]sysname LSW1

[LSW1]dhcp enable

[LSW1]vlan b 10 20 30

[LSW1]port-group vlan10

[LSW1-port-group-vlan10]group-member g 0/0/2 to g 0/0/10

[LSW1-port-group-vlan10]port link-type access

[LSW1-port-group-vlan10]port default vlan 10

[LSW1-port-group-vlan10]q

[LSW1]int vlanif 10

[LSW1-Vlanif10]ip address 192.168.10.254 24

[LSW1-Vlanif10]dhcp select relay

[LSW1-Vlanif10]dhcp relay server-ip 192.168.30.2

[LSW1-Vlanif10]int vlanif20

[LSW1-Vlanif20]ip address 192.168.20.254 24

[LSW1-Vlanif20]dhcp select relay

[LSW1-Vlanif20]dhcp relay server-ip 192.168.30.2

[LSW1-Vlanif20]q

[LSW1]port-group vlan20

[LSW1-port-group-vlan20]group-member g 0/0/11 to g 0/0/20

[LSW1-port-group-vlan20]port link-type access

[LSW1-port-group-vlan20]port default vlan 20

[LSW1-port-group-vlan20]q

[LSW1]int vlanif 30

[LSW1-Vlanif30]ip address 192.168.30.1 24

[LSW1-Vlanif30]int g0/0/1

[LSW1-GigabitEthernet0/0/1]port link-type access

[LSW1-GigabitEthernet0/0/1]port default vlan 30

[LSW1-GigabitEthernet0/0/1]q

[LSW1]rip

[LSW1-rip-1]version 2

[LSW1-rip-1]network 192.168.10.0

[LSW1-rip-1]network 192.168.20.0

[LSW1-rip-1]network 192.168.30.0

[LSW1-rip-1]q

AR1上檢視地址池使用情況