拓扑图
<Huawei>system-view
Huawei\]sysname SW1
\[SW1\]vlan batch 10 20
\[SW1\]int e0/0/1 #配置access接口
\[SW1-Ethernet0/0/1\]port link-type access
\[SW1-Ethernet0/0/1\]port default vlan 10
\[SW1-Ethernet0/0/1\]undo shut
\[SW1-Ethernet0/0/1\]q
\[SW1\]int e0/0/2 #配置access接口
\[SW1-Ethernet0/0/2\]port link-type access
\[SW1-Ethernet0/0/2\]port default vlan 20
\[SW1-Ethernet0/0/2\]undo shutdown
\[SW1-Ethernet0/0/2\]int e0/0/3 #配置access接口
\[SW1-Ethernet0/0/3\]port link-type access
\[SW1-Ethernet0/0/3\]port default vlan 10
\[SW1-Ethernet0/0/3\]undo shutdown
\[SW1-Ethernet0/0/3\]q
\[SW1\]int e0/0/4 #配置access接口
\[SW1-Ethernet0/0/4\]port link-type access
\[SW1-Ethernet0/0/4\]port default vlan 20
\[SW1-Ethernet0/0/4\]undo shutdown
\[SW1-Ethernet0/0/4\]q
\[SW1\]int g0/0/1 #配置trunk接口
\[SW1-GigabitEthernet0/0/1\]port link-type trunk
\[SW1-GigabitEthernet0/0/1\]port trunk allow-pass vlan all
\[SW1-GigabitEthernet0/0/1\]undo shutdown
\system-view
\[Huawei\]sysname R1
#开启dhcp功能
\[R1\]dhcp enable
#配置第一个虚拟子接口1.1
\[R1\]int g0/0/1.1
#选择封装类型及vlan
\[R1-GigabitEthernet0/0/1.1\]dot1q termination vid 10
#开启arp广播功能
\[R1-GigabitEthernet0/0/1.1\]arp broadcast enable
#配置IP地址
\[R1-GigabitEthernet0/0/1.1\]ip add 192.168.10.1 24
#指向DHCP服务器
\[R1-GigabitEthernet0/0/1.1\]dhcp select relay
\[R1-GigabitEthernet0/0/1.1\]dhcp relay server-ip 14.0.0.2
\[R1-GigabitEthernet0/0/1.1\]undo shutdown
\[R1-GigabitEthernet0/0/1.1\]q
#同理配置第二个虚拟接口1.2
\[R1\]int g0/0/1.2
\[R1-GigabitEthernet0/0/1.2\]dot1q termination vid 20
\[R1-GigabitEthernet0/0/1.2\]arp broadcast enable
\[R1-GigabitEthernet0/0/1.2\]ip add 192.168.20.1 24
\[R1-GigabitEthernet0/0/1.2\]dhcp select relay
\[R1-GigabitEthernet0/0/1.2\]dhcp relay server-ip 14.0.0.2
\[R1-GigabitEthernet0/0/1.2\]q
#配置IP地址即可
\[R1\]int g0/0/3
\[R1-GigabitEthernet0/0/3\]ip add 14.0.0.1 24
\[R1-GigabitEthernet0/0/3\]undo shutdown
\[R1-GigabitEthernet0/0/3\]q
#配置IP地址即可
\[R1\]int g0/0/2
\[R1-GigabitEthernet0/0/2\]ip add 12.0.0.1 24
\[R1-GigabitEthernet0/0/2\]undo shutdown
\[R1-GigabitEthernet0/0/2\]q
#配置指向PC7的默认路由
\[R1\]ip route-static 0.0.0.0 0.0.0.0 12.0.0.2
\system-view
\[Huawei\]sysname R2
#在全局模式下开启dhcp功能
\[R2\]dhcp enable
#配置IP地址
\[R2\]int g0/0/2
\[R2-GigabitEthernet0/0/2\]ip add 12.0.0.2 24
\[R2-GigabitEthernet0/0/2\]undo shutdown
\[R2-GigabitEthernet0/0/2\]q
#配置IP地址、指向DHCP服务器
\[R2\]int g0/0/0
\[R2-GigabitEthernet0/0/0\]ip add 15.0.0.1 24
\sys
\[Huawei\]sysname R3
#在全局模式下开启dhcp功能
\[R3\]dhcp enable
#配置IP地址、宣告DHCP地址池
\[R3\]interface g0/0/3
\[R3-GigabitEthernet0/0/3\]ip add 14.0.0.2 24
#选择全局的地址池给DHCP客户端使用，而"dhcp select interface"则是选择接口的地址池给DHCP客户端使用
\[R3-GigabitEthernet0/0/3\]dhcp select global
\[R3-GigabitEthernet0/0/3\]undo shutdown
\[R3-GigabitEthernet0/0/3\]q
#配置主机PC7的地址池（名称：pc7）
\[R3\]ip pool dhcp-pc7
#设置IP地址网段
\[R3-ip-pool-dhcp-pc7\]network 15.0.0.0 mask 24
#设置网关
\[R3-ip-pool-dhcp-pc7\]gateway-list 15.0.0.1
#DNS服务器地址
\[R3-ip-pool-dhcp-pc7\]dns-list 8.8.8.8 114.114.114.114
\[R3-ip-pool-dhcp-pc7\]q
#配置VLAN10的IP地址池
\[R3\]ip pool dhcp-vlan10
\[R3-ip-pool-dhcp-vlan10\]network 192.168.10.0 mask 24
\[R3-ip-pool-dhcp-vlan10\]gateway-list 192.168.10.1
\[R3-ip-pool-dhcp-vlan10\]dns-list 8.8.8.8 114.114.114.114
\[R3-ip-pool-dhcp-vlan10\]q
#配置VLAN20的IP地址池
\[R3\]ip pool dhcp-vlan20
\[R3-ip-pool-dhcp-vlan20\]network 192.168.20.0 mask 24
\[R3-ip-pool-dhcp-vlan20\]gateway-list 192.168.20.1
\[R3-ip-pool-dhcp-vlan20\]dns-list 8.8.8.8 114.114.114.114
\[R3-ip-pool-dhcp-vlan20\]q
#配置静态路由
\[R3\]ip route-static 192.168.10.0 24 14.0.0.1
\[R3\]ip route-static 192.168.20.0 24 14.0.0.1
\[R3\]ip route-static 15.0.0.0 24 14.0.0.1
#指向DHCP服务器
\[R2-GigabitEthernet0/0/0\]dhcp select relay
\[R2-GigabitEthernet0/0/0\]dhcp relay server-ip 14.0.0.2
\[R2-GigabitEthernet0/0/0\]undo shut
\[R2-GigabitEthernet0/0/0\]q
#配置向左流通的静态路由
\[R2\]ip route-static 192.168.10.0 24 12.0.0.1
\[R2\]ip route-static 192.168.20.0 24 12.0.0.1
\[R2\]ip route-static 14.0.0.0 24 12.0.0.1
测试pc自动获得IP地址