拓扑图：
交换机配置：
<Huawei>system-view [Huawei]sysname sw1 [sw1]v b 10 20 [sw1]int e0/0/1 [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]int 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 a [sw1-GigabitEthernet0/0/1]un sh路由器R1配置：
<Huawei>system-view [Huawei]sysname R1 [R1]dhcp enable [R1]int g0/0/0 [R1-GigabitEthernet0/0/0]ip add 14.0.0.2 24 [R1-GigabitEthernet0/0/0]dhcp select global [R1-GigabitEthernet0/0/0]un sh [R1-GigabitEthernet0/0/0]q [R1]ip route-static 0.0.0.0 0.0.0.0 14.0.0.1 [R1]ip pool dhcp15 [R1-ip-pool-dhcp15]network 15.0.0.1 mask 24 //不配的话获取不到IP [R1-ip-pool-dhcp15]gateway-list 15.0.0.1 [R1-ip-pool-dhcp15]dns-list 8.8.8.8 2.2.2.2 [R1-ip-pool-dhcp15]excluded-ip-address 15.0.0.100 15.0.0.254 //排除地址段 [R1-ip-pool-dhcp15]static-bind ip-address 15.0.0.88 mac-address 5489-98EF-383F //分配固定IP [R1-ip-pool-dhcp15]q [R1]ip pool dhcpvlan10 [R1-ip-pool-dhcpvlan10]network 192.168.10.0 mask 24 [R1-ip-pool-dhcpvlan10]gateway-list 192.168.10.1 [R1-ip-pool-dhcpvlan10]dns-list 8.8.8.8 2.2.2.2 [R1-ip-pool-dhcpvlan10]q [R1]ip pool dhcpvlan20 [R1-ip-pool-dhcpvlan20]network 192.168.20.0 mask 24 [R1-ip-pool-dhcpvlan20]gateway-list 192.168.20.1 [R1-ip-pool-dhcpvlan20]dns-list 8.8.8.8 2.2.2.2 [R1-ip-pool-dhcpvlan20]q路由器R2配置：
<Huawei>system-view [Huawei]sysname R2 [R2]dhcp enable [R2]int g0/0/1.10 [R2-GigabitEthernet0/0/1.10]d t v 10 [R2-GigabitEthernet0/0/1.10]ip add 192.168.10.1 24 [R2-GigabitEthernet0/0/1.10]a b en [R2-GigabitEthernet0/0/1.10]dhcp select relay [R2-GigabitEthernet0/0/1.10]dhcp relay server-ip 14.0.0.2 [R2-GigabitEthernet0/0/1.10]q [R2]int g0/0/1.20 [R2-GigabitEthernet0/0/1.20]d t v 20 [R2-GigabitEthernet0/0/1.20]ip add 192.168.20.1 24 [R2-GigabitEthernet0/0/1.20]a b en [R2-GigabitEthernet0/0/1.20]dhcp select relay [R2-GigabitEthernet0/0/1.20]dhcp relay server-ip 14.0.0.2 [R2-GigabitEthernet0/0/1.20]q [R2]int g0/0/2 [R2-GigabitEthernet0/0/2]ip add 14.0.0.1 24 [R2-GigabitEthernet0/0/2]un sh [R2-GigabitEthernet0/0/2]int g0/0/0 [R2-GigabitEthernet0/0/0]ip add 12.0.0.1 24 [R2-GigabitEthernet0/0/0]un sh [R2-GigabitEthernet0/0/0]q [R2]ip route-static 15.0.0.0 24 12.0.0.2路由器R3配置：
<Huawei>system-view [Huawei]sysname 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]dhcp relay server-ip 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 [R3]ping 12.0.0.1 PING 12.0.0.1: 56 data bytes, press CTRL_C to break Reply from 12.0.0.1: bytes=56 Sequence=1 ttl=255 time=80 ms Reply from 12.0.0.1: bytes=56 Sequence=2 ttl=255 time=50 ms Reply from 12.0.0.1: bytes=56 Sequence=3 ttl=255 time=50 ms Reply from 12.0.0.1: bytes=56 Sequence=4 ttl=255 time=40 ms Reply from 12.0.0.1: bytes=56 Sequence=5 ttl=255 time=30 ms --- 12.0.0.1 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 30/50/80 ms [R3]ping 14.0.0.1 PING 14.0.0.1: 56 data bytes, press CTRL_C to break Reply from 14.0.0.1: bytes=56 Sequence=1 ttl=255 time=40 ms Reply from 14.0.0.1: bytes=56 Sequence=2 ttl=255 time=1 ms Reply from 14.0.0.1: bytes=56 Sequence=3 ttl=255 time=20 ms Reply from 14.0.0.1: bytes=56 Sequence=4 ttl=255 time=40 ms Reply from 14.0.0.1: bytes=56 Sequence=5 ttl=255 time=50 ms --- 14.0.0.1 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 1/30/50 ms [R3]ping 14.0.0.2 PING 14.0.0.2: 56 data bytes, press CTRL_C to break Reply from 14.0.0.2: bytes=56 Sequence=1 ttl=254 time=90 ms Reply from 14.0.0.2: bytes=56 Sequence=2 ttl=254 time=40 ms Reply from 14.0.0.2: bytes=56 Sequence=3 ttl=254 time=60 ms Reply from 14.0.0.2: bytes=56 Sequence=4 ttl=254 time=60 ms Reply from 14.0.0.2: bytes=56 Sequence=5 ttl=254 time=60 ms --- 14.0.0.2 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 40/62/90 ms去PC机获取IP地址：
在PC5上进行测试，证明全网互通：
PC>ping 192.168.10.254 Ping 192.168.10.254: 32 data bytes, Press Ctrl_C to break From 192.168.10.254: bytes=32 seq=1 ttl=126 time=172 ms From 192.168.10.254: bytes=32 seq=2 ttl=126 time=78 ms From 192.168.10.254: bytes=32 seq=3 ttl=126 time=47 ms From 192.168.10.254: bytes=32 seq=4 ttl=126 time=94 ms From 192.168.10.254: bytes=32 seq=5 ttl=126 time=78 ms --- 192.168.10.254 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 47/93/172 ms PC>ping 192.168.10.253 Ping 192.168.10.253: 32 data bytes, Press Ctrl_C to break From 192.168.10.253: bytes=32 seq=1 ttl=126 time=235 ms From 192.168.10.253: bytes=32 seq=2 ttl=126 time=78 ms From 192.168.10.253: bytes=32 seq=3 ttl=126 time=109 ms From 192.168.10.253: bytes=32 seq=4 ttl=126 time=78 ms From 192.168.10.253: bytes=32 seq=5 ttl=126 time=78 ms --- 192.168.10.253 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 78/115/235 ms PC>ping 192.168.20.253 Ping 192.168.20.253: 32 data bytes, Press Ctrl_C to break From 192.168.20.253: bytes=32 seq=1 ttl=126 time=203 ms From 192.168.20.253: bytes=32 seq=2 ttl=126 time=79 ms From 192.168.20.253: bytes=32 seq=3 ttl=126 time=78 ms From 192.168.20.253: bytes=32 seq=4 ttl=126 time=93 ms From 192.168.20.253: bytes=32 seq=5 ttl=126 time=63 ms --- 192.168.20.253 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 63/103/203 ms PC>ping 192.168.20.254 Ping 192.168.20.254: 32 data bytes, Press Ctrl_C to break From 192.168.20.254: bytes=32 seq=1 ttl=126 time=219 ms From 192.168.20.254: bytes=32 seq=2 ttl=126 time=78 ms From 192.168.20.254: bytes=32 seq=3 ttl=126 time=62 ms From 192.168.20.254: bytes=32 seq=4 ttl=126 time=78 ms From 192.168.20.254: bytes=32 seq=5 ttl=126 time=78 ms --- 192.168.20.254 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 62/103/219 ms PC>
