cisco DHCP服务器与DHCP中继

 实验拓扑：

使得左边DHCP客户端直接获取ip地址，右边的客户端通过中继后再获取ip地址；

相关配置：

DHCP服务器：

20网段：

DHCP_Server(config)#ip dhcp pool net_to_20

DHCP_Server(dhcp-config)#network 20.1.1.0 /24

DHCP_Server(dhcp-config)#default-router 20.1.1.1 

DHCP_Server(dhcp-config)#dns-server 8.8.8.8 

DHCP_Server(dhcp-config)#domain-name yf.com 

30网段：

DHCP_Server(config)#ip dhcp pool  net_to_30

DHCP_Server(dhcp-config)#default-router 30.1.1.2

DHCP_Server(dhcp-config)#dns-server 7.7.7.7

DHCP_Server(dhcp-config)#network 30.1.1.0 /24

DHCP_Server(dhcp-config)#domain-name hui.com

DHCP_Server(config)#ip dhcp excluded-address 20.1.1.1 

DHCP_Server(config)#ip dhcp excluded-address 30.1.1.2 

测试：

DHCP_Client(config)#inter f0/0

DHCP_Client(config-if)#ip address dhcp 

DHCP_Client(config-if)#no shutdown 

*Mar  1 00:20:48.591: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0/0 assigned DHCP address 20.1.1.2, mask 255.255.255.0, hostname DHCP_Client

 

DHCP中继测试：

DHCP_Server(config)#ip route 30.1.1.0 255.255.255.0 10.1.1.2

DHCP_Relay(config)#interface f0/1

DHCP_Relay(config-if)#ip helper-address 10.1.1.1

 

DHCP_Client2(config)#interface f0/0

DHCP_Client2(config-if)#no shutdown 

DHCP_Client2(config-if)#ip add dhcp

*Mar  1 00:26:26.027: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0/0 assigned DHCP address 30.1.1.1, mask 255.255.255.0, hostname DHCP_Client2