拓扑图：
交换机SW1配置：
<Huawei>system-view
更改主机名
[Huawei]sysname sw1
创建VLAN
[sw1]vlan batch 10 20
华为Access配置
[sw1]int e0/0/1
[sw1-Ethernet0/0/1]p l a
[sw1-Ethernet0/0/1]p d v 10
[sw1-Ethernet0/0/1]int e0/0/2
[sw1-Ethernet0/0/2]p l a
[sw1-Ethernet0/0/2]p d v 20
[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]int e0/0/4
[sw1-Ethernet0/0/4]p l a
[sw1-Ethernet0/0/4]p d v 20
华为Trunk配置
[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
路由器R1配置：
全局配置模式开启DHCP功能
[R1]dhcp enable
单臂路由
[R1]int g0/0/1.10 进入子接口
[R1-GigabitEthernet0/0/1.10]d t v 10
[R1-GigabitEthernet0/0/1.10]ip add 192.168.10.1 24
[R1-GigabitEthernet0/0/1.10]a b e
[R1-GigabitEthernet0/0/1.10]dhcp select interface 基于基于接口配置DHCP
[R1-GigabitEthernet0/0/1.10]d s d 2.2.2.2 8.8.8.8 配置DNS
[R1-GigabitEthernet0/0/1.10]q
[R1]int g0/0/1.20
[R1-GigabitEthernet0/0/1.20]d t v 20
[R1-GigabitEthernet0/0/1.20]ip add 192.168.20.1 24
[R1-GigabitEthernet0/0/1.20]a b e
[R1-GigabitEthernet0/0/1.20]dhcp select interface
[R1-GigabitEthernet0/0/1.20]d s d 2.2.2.2 8.8.8.8
[R1-GigabitEthernet0/0/1.20] q
[R1]ip route-static 0.0.0.0 0.0.0.0 12.0.0.2 配默认路由
路由器R2配置：
<Huawei>system-view
[Huawei]sysname R2
[R2]dhcp enable 进入全局模式
[R2]ip pool dhcp15 建立DHCP地址池名为15
[R2-ip-pool-dhcp15]gateway-list 15.0.0.1 指定网关
[R2-ip-pool-dhcp15]network 15.0.0.0 mask 255.255.255.0 网段及子网压掩码
[R2-ip-pool-dhcp15]dns-list 2.2.2.2 8.8.8.8
[R2-ip-pool-dhcp15]q
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip add 12.0.0.2 24
[R2-GigabitEthernet0/0/0]int g0/0/1
[R2-GigabitEthernet0/0/1]ip add 15.0.0.1 24
[R2-GigabitEthernet0/0/1]dhcp select global 请求DHCP服务
[R2-GigabitEthernet0/0/1]q
[R2]ip route-static 0.0.0.0 0.0.0.0 12.0.0.1 配默认路由
在PC1进行测试：（全网互通）
释放IP地址
PC>ipconfig /release
Link local IPv6 address...........: fe80::5689:98ff:fea2:5a58
IPv6 address......................: :: / 128
IPv6 gateway......................: ::
IPv4 address......................: 0.0.0.0
Subnet mask.......................: 0.0.0.0
Gateway...........................: 0.0.0.0
Physical address..................: 54-89-98-A2-5A-58
DNS server........................:
重新获取IP地址
PC>ipconfig /renew
IP Configuration
Link local IPv6 address...........: fe80::5689:98ff:fea2:5a58
IPv6 address......................: :: / 128
IPv6 gateway......................: ::
IPv4 address......................: 192.168.10.253
Subnet mask.......................: 255.255.255.0
Gateway...........................: 192.168.10.1
Physical address..................: 54-89-98-A2-5A-58
DNS server........................: 2.2.2.2
8.8.8.8
PC>ping 12.0.0.1
Ping 12.0.0.1: 32 data bytes, Press Ctrl_C to break
From 12.0.0.1: bytes=32 seq=1 ttl=255 time=47 ms
From 12.0.0.1: bytes=32 seq=2 ttl=255 time=16 ms
From 12.0.0.1: bytes=32 seq=3 ttl=255 time=31 ms
From 12.0.0.1: bytes=32 seq=4 ttl=255 time=16 ms
From 12.0.0.1: bytes=32 seq=5 ttl=255 time=31 ms
--- 12.0.0.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 16/28/47 ms
PC>ping 12.0.0.2
Ping 12.0.0.2: 32 data bytes, Press Ctrl_C to break
From 12.0.0.2: bytes=32 seq=1 ttl=254 time=62 ms
From 12.0.0.2: bytes=32 seq=2 ttl=254 time=63 ms
From 12.0.0.2: bytes=32 seq=3 ttl=254 time=47 ms
From 12.0.0.2: bytes=32 seq=4 ttl=254 time=62 ms
From 12.0.0.2: bytes=32 seq=5 ttl=254 time=31 ms
--- 12.0.0.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 31/53/63 ms
PC>ping 15.0.0.1
Ping 15.0.0.1: 32 data bytes, Press Ctrl_C to break
From 15.0.0.1: bytes=32 seq=1 ttl=254 time=62 ms
From 15.0.0.1: bytes=32 seq=2 ttl=254 time=47 ms
From 15.0.0.1: bytes=32 seq=3 ttl=254 time=63 ms
From 15.0.0.1: bytes=32 seq=4 ttl=254 time=62 ms
From 15.0.0.1: bytes=32 seq=5 ttl=254 time=63 ms
--- 15.0.0.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 47/59/63 ms
