华三交换机配置DHCP中继

环境：

两台交换机、四台终端

互联VLAN：VLAN100

终端VLAN：VLAN10、VLAN20

配置接入交换机
创建VLAN
[jieru]vlan 10
[jieru]vlan 20
[jieru]vlan 100

划分端口
[jieru]vlan 10
[jieru-vlan10]port GigabitEthernet 1/0/10 GigabitEthernet 1/0/11
[jieru]vlan 20
[jieru-vlan20]port GigabitEthernet 1/0/20 GigabitEthernet 1/0/21
[jieru]vlan 100
[jieru-vlan100]port GigabitEthernet 1/0/1

配置终端接入网关地址
[jieru]interface Vlan-interface 10
[jieru-Vlan-interface10]ip address 192.168.10.1 24

[jieru]interface Vlan-interface 20
[jieru-Vlan-interface20]ip address 192.168.20.1 24

配置设备互联地址
[jieru]interface Vlan-interface 100
[jieru-Vlan-interface100]ip address 10.10.10.1 255.255.255.252

启动DHCP服务，并指定服务器地址
[jieru]dhcp enable

[jieru]interface Vlan-interface 10
[jieru-Vlan-interface10]dhcp select relay                选择中继模式
[jieru-Vlan-interface10]dhcp relay server-address 10.10.10.2        DHCP服务器地址
[jieru-Vlan-interface10]quit

[jieru]interface Vlan-interface 20
[jieru-Vlan-interface20]dhcp select relay
[jieru-Vlan-interface20]dhcp relay server-address 10.10.10.2
[jieru-Vlan-interface20]

另一种dhcp-server 指定服务器IP地址（有的设备不支持）
dhcp-server 1 ip  10.109.9.21        新建组并添加服务器IP地址

interface vlan-interface2        进入接口
dhcp-server 1                        指定VLAN2的dhcp服务器

配置DHCP服务器
创建互联VLAN，划分端口
[dhcp]vlan 100

[dhcp-vlan100]port GigabitEthernet 1/0/1

配置互联VLAN地址
[dhcp]interface Vlan-interface 100
[dhcp-Vlan-interface100]ip address 10.10.10.2 255.255.255.252

配置DHCP地址池
[dhcp]dhcp enable
[dhcp]dhcp server ip-pool vlan10        创建地址池叫vlan10
[dhcp-dhcp-pool-vlan10]network 192.168.10.0 mask 255.255.255.0      地址池的网络号和掩码
[dhcp-dhcp-pool-vlan10]gateway-list 192.168.10.1        地址池的网关
[dhcp-dhcp-pool-vlan10]dns-list 8.8.8.8        地址池的dns地址
[dhcp-dhcp-pool-vlan10]forbidden-ip 192.168.10.6 192.168.10.18        从地址池中排除、不分配
[dhcp-dhcp-pool-vlan10]expired day 0 hour 0 minute 15 second 0        设置地址租约为15分钟

[dhcp]dhcp server ip-pool vlan20
[dhcp-dhcp-pool-vlan20]network 192.168.20.0 mask 255.255.255.0
[dhcp-dhcp-pool-vlan20]gateway-list 192.168.20.1
[dhcp-dhcp-pool-vlan20]dns-list 114.114.114.114
[dhcp-dhcp-pool-vlan20]forbidden-ip 192.168.20.2 192.168.20.1 192.168.20.3
[dhcp-dhcp-pool-vlan20]expired day 0 hour 0 minute 15 second 0

配置路由
[jieru]ip route-static 0.0.0.0 0.0.0.0 10.10.10.2        接到所有流量去该地址

[dhcp]ip route-static 192.168.10.0 24 10.10.10.1        配置回程路由
[dhcp]ip route-static 192.168.20.0 24 10.10.10.1

查看终端获取地址情况