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DHCP中继链路实验

分类: 文章 • 2024-02-09 21:51:46

DHCP中继链路实验

中继链路的应用场景：

通常在DHCP分配网段过多的情况下，网关路由器上配置DHCP服务，压力过大，一般我们用第二路由器，或则第二台DHCP服务器来分担业务

DHCP中继链路实验

交换机配置命令：

<Huawei>sys

[Huawei]sys SW1

[SW1]v b 10 20

[SW1]interface e0/0/01

[SW1-Ethernet0/0/1]p l a

[SW1-Ethernet0/0/1]p d v 10

[SW1-Ethernet0/0/1]un sh

[SW1-Ethernet0/0/1]p d v 10

[SW1-Ethernet0/0/1]interface e0/0/2

[SW1-Ethernet0/0/2]p l a

[SW1-Ethernet0/0/2]p d v 20

[SW1-Ethernet0/0/2]un sh

[SW1-Ethernet0/0/2]int e0/0/3

[SW1-Ethernet0/0/3]p l a

[SW1-Ethernet0/0/3]p d v 10

[SW1-Ethernet0/0/3]un sh

[SW1-Ethernet0/0/3]int e0/0/4

[SW1-Ethernet0/0/4]p l a

[SW1-Ethernet0/0/4]p d v 20

[SW1-Ethernet0/0/4]un sh

[SW1-Ethernet0/0/4]int g0/0/1

[SW1-GigabitEthernet0/0/1]p l t

[SW1-GigabitEthernet0/0/1]p t a v 10 20

[SW1-GigabitEthernet0/0/1]un sh

交换机的命令就很简单，就是配置接口，然后G接口配置了trunk链路

路由器配置命令：

<Huawei>sys

[Huawei]sys R1

[R1]dhcp enable

[R1]int g0/0/1.10 配置子接口地址

[R1-GigabitEthernet0/0/1.10]dot1q termination vid 10

[R1-GigabitEthernet0/0/1.10]ip add 192.168.10.1 24

[R1-GigabitEthernet0/0/1.10]arp broadcast enable

[R1-GigabitEthernet0/0/1.10]dhcp select relay 基于DHCP中继

[R1-GigabitEthernet0/0/1.10]dhcp relay server-ip 14.0.0.2 去14.0.0.2请求DHCP服务

[R1-GigabitEthernet0/0/1.10]q

[R1]int g0/0/1.20

[R1-GigabitEthernet0/0/1.20]dot1q termination vid 20

[R1-GigabitEthernet0/0/1.20]ip add 192.168.20.1 24

[R1-GigabitEthernet0/0/1.20]arp broadcast enable

[R1-GigabitEthernet0/0/1.20]dhcp select relay

[R1-GigabitEthernet0/0/1.20]dhcp relay server-ip 14.0.0.2

[R1-GigabitEthernet0/0/1.20]q

[R1]int g0/0/1

[R1-GigabitEthernet0/0/1]un sh

[R1-GigabitEthernet0/0/1]q

[R1]int g0/0/0

[R1-GigabitEthernet0/0/0]ip add 12.0.0.1 24

[R1-GigabitEthernet0/0/0]un sh

[R1-GigabitEthernet0/0/0]int g0/0/2

[R1-GigabitEthernet0/0/2]ip add 14.0.0.1 24

[R1-GigabitEthernet0/0/2]un sh

[R1-GigabitEthernet0/0/2]q

[R1]ip route-static 15.0.0.0 24 12.0.0.2

<Huawei>sys

[Huawei]sys R2

[R2]dhcp enable

[R2]int g0/0/0

[R2-GigabitEthernet0/0/0]ip add 14.0.0.2 24

[R2-GigabitEthernet0/0/0]dhcp select global

[R2-GigabitEthernet0/0/0]q

[R2]ip pool dhcp15 这里的15并非是一个定值，可以随意输入

[R2-ip-pool-dhcp15]network 15.0.0.0 mask 24

[R2-ip-pool-dhcp15]gateway-list 15.0.0.1

[R2-ip-pool-dhcp15]dns-list 8.8.8.8 2.2.2.2

[R2-ip-pool-dhcp15]excluded-ip-address 15.0.0.100 15.0.0.200 配置地址池的范围

[R2-ip-pool-dhcp15]static-bind ip-address 15.0.0.88 mac-address 5489-98FF-79CE 这里绑定的MAC地址，如无必要，可以不用绑定

[R2-ip-pool-dhcp15]q

[R2]ip pool dhcpv10

[R2-ip-pool-dhcpv10]network 192.168.10.0 mask 24

[R2-ip-pool-dhcpv10]gateway-list 192.168.10.1

[R2-ip-pool-dhcpv10]dns-list 8.8.8.8

[R2-ip-pool-dhcpv10]q

[R2]ip pool dhcpv20

[R2-ip-pool-dhcpv20]network 192.168.20.0 mask 24

[R2-ip-pool-dhcpv20]gateway-list 192.168.20.1

[R2-ip-pool-dhcpv20]dns-list 8.8.8.8 dns的解析地址，为了做实验，也可以随意配置，不过8.8.8.8和114.114.114.114是国际上都可以用的地址，生产环境中也可以使用

[R2-ip-pool-dhcpv20]q

[R2]ip route-static 0.0.0.0 0.0.0.0 14.0.0.1 这里为了方便（其实就是为了偷懒），配置了默认路由

<Huawei>sys

[Huawei]sys R3

[R3]int g0/0/0

[R3-GigabitEthernet0/0/0]ip add 12.0.0.2 24

[R3-GigabitEthernet0/0/0]un sh

[R3-GigabitEthernet0/0/0]q

[R3]dhcp enable

[R3]int g0/0/1

[R3-GigabitEthernet0/0/1]ip add 15.0.0.1 24

[R3-GigabitEthernet0/0/1]dhcp select relay

[R3-GigabitEthernet0/0/1]d r s 14.0.0.2

[R3-GigabitEthernet0/0/1]q

[R3]ip route-static 0.0.0.0 0.0.0.0 12.0.0.1

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