21-DHCP Relay技术 //IOU模拟

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第七_感 2018-07-07 09:32:56 博主文章分类：高级交换 ©著作权

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一、实验拓扑：二、命令部署： 1、基本命令： Server(config)#int f1/0 Server(config-if)#no shutdown Server(config-if)#no switchport Server(config-if)#ip add 172.168.24.1 255.255.255.0

Server(config)#ip dhcp pool vlan10 Server(dhcp-config)#network 192.168.10.0 255.255.255.0 Server(dhcp-config)#default-router 192.168.10.254 Server(dhcp-config)#dns-server 8.8.8.8 Server(dhcp-config)#lease 15

Server(config)#ip dhcp pool vlan20 Server(dhcp-config)#network 192.168.20.0 255.255.255.0 Server(dhcp-config)#default-router 192.168.20.254 Server(dhcp-config)#dns-server 8.8.8.8 Server(dhcp-config)#lease 30

Server(config)#ip dhcp excluded-address 192.168.10.254 Server(config)#ip dhcp excluded-address 192.168.20.254

Server(config)#ip routing Server(config)#router ospf 100 Server(config-router)#network 172.168.24.0 0.0.0.255 area 0

SW1(config)#int f1/0 SW1(config-if)#no shutdown SW1(config-if)#no switchport SW1(config-if)#ip address 172.168.24.2 255.255.255.0

SW1(config)#int f1/1 SW1(config-if)#no shutdown SW1(config-if)#switchport trunk encapsulation dot1q SW1(config-if)#switchport mode trunk

SW1(config)#int vlan 10 SW1(config-if)#no shutdown SW1(config-if)#ip address 192.168.10.254 255.255.255.0 SW1(config)#int vlan 20 SW1(config-if)#no shutdown SW1(config-if)#ip address 192.168.20.254 255.255.255.0

SW1(config)#ip routing SW1(config)#router ospf 100 SW1(config-router)#network 172.168.24.0 0.0.0.255 area 0 SW1(config-router)#network 192.168.10.0 0.0.0.255 area 0 SW1(config-router)#network 192.168.20.0 0.0.0.255 area 0

SW2(config)#int f1/0 SW2(config-if)#no shutdown SW2(config-if)#switchport trunk encapsulation dot1q SW2(config-if)#switchport mode trunk

SW2(config)#int f1/1 SW2(config-if)#no shutdown SW2(config-if)#switchport mode access SW2(config-if)#switchport access vlan 10

SW2(config)#int f1/2 SW2(config-if)#no shutdown SW2(config-if)#switchport mode access SW2(config-if)#switchport access vlan 20

SW2(vlan)#vlan 10 VLAN 10 added: Name: VLAN0010 SW2(vlan)#vlan 20 VLAN 20 added: Name: VLAN0020

SW2(config)#no ip routing

PC1(config)#int f0/0 PC1(config-if)#no shutdown PC1(config-if)#ip address dhcp PC1(config)#no ip routing PC1(config)#ip default-gateway 192.168.10.254

PC2(config)#int f0/0 PC2(config-if)#no shutdown PC2(config-if)#ip address dhcp PC2(config)#no ip routing PC2(config)#ip default-gateway 192.168.20.254

2、重点命令： SW1(config)#int vlan 10 SW1(config-if)#ip helper-address 172.168.24.1

SW1(config)#int vlan 20 SW1(config-if)#ip helper-address 172.168.24.1

三、验证：（1）交换机SW2和三层交换机SW1抓包 VLAN20发出的DHCP Discover VLAN10发出的DHCP Discover （2）Server端和三层交换机SW1之间抓包 GNS3-0.8.6