这个是我实验前的图
下面我们来配置服务器：
R3：
<Huawei>
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys R3
[R3]DHCP enable
[R3]int g
[R3]int GigabitEthernet 0/0/1
[R3-GigabitEthernet0/0/1]ip ad 192.168.5.253 24（设置接口的IP地址）
[R3-GigabitEthernet0/0/1]q
[R3]ip pool vlan2（建立地址池)
Info: It's successful to create an IP address pool.
[R3-ip-pool-vlan2]network 192.168.2.0 mask 24(配置网络网段）
[R3-ip-pool-vlan2]gateway-list 192.168.2.254 （配置网关这里的网关是我们在sw1,2中设置的vlanIP）
[R3-ip-pool-vlan2]dns-list 114.114.114.114（配置dns)
[R3-ip-pool-vlan2]excluded-ip-address 192.168.2.100 192.168.2.200（排除网段）
[R3-ip-pool-vlan2]q
[R3]int g
[R3]int GigabitEthernet 0/0/2
[R3-GigabitEthernet0/0/2]ip ad 192.168.7.253 24
[R3-GigabitEthernet0/0/2]q
[R3]ip pool vlan3
[R3-ip-pool-vlan3]network 192.168.3.0 24
[R3-ip-pool-vlan3]network 192.168.3.0 mask 24
[R3-ip-pool-vlan3]gateway-list 192.168.3.254
[R3-ip-pool-vlan3]dns-list 114.114.114.114
[R3-ip-pool-vlan3]excluded-ip-address 192.168.3.100 192.168.3.200
[R3-ip-pool-vlan3]q
[R3]ip pool vlan4
Info: It's successful to create an IP address pool.
[R3-ip-pool-vlan4]network 192.168.4.0 mask 24
[R3-ip-pool-vlan4]g
[R3-ip-pool-vlan4]gateway-list 192.168.4.254
[R3-ip-pool-vlan4]dns-list 114.114.114.114
[R3-ip-pool-vlan4]excluded-ip-address 192.168.4.100 192.168.4.200
[R3-ip-pool-vlan4]q
[R3]
[R3]int g
[R3]int GigabitEthernet 0/0/1
[R3-GigabitEthernet0/0/1]dhcp select global(将DHCP配置到端口）
[R3-GigabitEthernet0/0/1]q
[R3]int g
[R3]int GigabitEthernet 0/0/2
[R3-GigabitEthernet0/0/2]dhcp select global (将DHCP配置到端口）
[R3-GigabitEthernet0/0/2]q
[R3]下面我们来配置第二个服务器：
R4：
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys R4
[R4]int GigabitEthernet 0/0/1
[R4-GigabitEthernet0/0/1]ip ad 192.168.6.253 24
[R4-GigabitEthernet0/0/1]q
[R4]un in en
[R4]dhcp enable
[R4]int GigabitEthernet 0/0/2
[R4-GigabitEthernet0/0/2]ip ad 192.168.8.253 24
[R4-GigabitEthernet0/0/2]q
[R4]ip pool vlan2
Info: It's successful to create an IP address pool.
[R4-ip-pool-vlan2]network 192.168.2.0 mask 24
[R4-ip-pool-vlan2]g
[R4-ip-pool-vlan2]gateway-list 192.168.2.254
[R4-ip-pool-vlan2]dn
[R4-ip-pool-vlan2]dns-list 114.114.114.114
[R4-ip-pool-vlan2]ex
[R4-ip-pool-vlan2]excluded-ip-address 192.168.2.100 192.168.2.200
[R4-ip-pool-vlan2]q
[R4]ip poo
[R4]ip pool vlan3
Info: It's successful to create an IP address pool.
[R4-ip-pool-vlan3]netw
[R4-ip-pool-vlan3]network 192.168.3.0 ma
[R4-ip-pool-vlan3]network 192.168.3.0 mask 24
[R4-ip-pool-vlan3]ga
[R4-ip-pool-vlan3]gateway-list 192.168.3.254
[R4-ip-pool-vlan3]dns
[R4-ip-pool-vlan3]dns-list 114.114.114.114
[R4-ip-pool-vlan3]q
[R4]ip pool vlan4
Info: It's successful to create an IP address pool.
[R4-ip-pool-vlan4]network 192.168.4.0 mask 24
[R4-ip-pool-vlan4]ga
[R4-ip-pool-vlan4]gateway-list 192.168.4.254
[R4-ip-pool-vlan4]dns
[R4-ip-pool-vlan4]dns-list 114.114.114.114
[R4-ip-pool-vlan4]q
[R4]
[R4]int g
[R4]int GigabitEthernet 0/0/1
[R4-GigabitEthernet0/0/1]dhcp select global
[R4-GigabitEthernet0/0/1]q
[R4]int g
[R4]int GigabitEthernet 0/0/2
[R4-GigabitEthernet0/0/2]dhcp select global
[R4-GigabitEthernet0/0/2]q
[R4]上面就是我们这个网络拓扑的服务器的配置，下面我们要在三层交换机上开启中继：
代码如下：
Sw1:
The device is running!
<sw1>sys
[sw1]int Vlanif 2(进入vlan2）
[sw1-Vlanif2]dhcp select relay （配置端口为中继模式）
[sw1-Vlanif2]dhcp relay server-ip 192.168.5.253（配置服务器的接口）
[sw1-Vlanif2]q
[sw1]int vlan
[sw1]int Vlanif 3
[sw1-Vlanif3]dhcp select relay （配置端口为中继模式）
[sw1-Vlanif3]dhcp relay server-ip 192.168.5.253 （配置服务器的接口）
[sw1-Vlanif3]dhcp relay server-ip 192.168.8.253（配置服务器的接口）[sw1-Vlanif3]dis
[sw1-Vlanif3]display th
[sw1-Vlanif3]display this
#
interface Vlanif3
ip address 192.168.3.254 255.255.255.0
dhcp select relay
dhcp relay server-ip 192.168.5.253
dhcp relay server-ip 192.168.8.253
#
return
[sw1-Vlanif3]q
[sw1]int Vlanif 2
[sw1-Vlanif2]dhcp relay server-ip 192.168.8.253
[sw1-Vlanif2]display this
#
interface Vlanif2
ip address 192.168.2.254 255.255.255.0
dhcp select relay
dhcp relay server-ip 192.168.5.253
dhcp relay server-ip 192.168.8.253
#
return
[sw1-Vlanif2]q
[sw1]int Vlanif 4
[sw1-Vlanif4]dhcp select relay
[sw1-Vlanif4]dhcp relay server-ip 192.168.5.253
[sw1-Vlanif4]dhcp relay server-ip 192.168.8.253
[sw1-Vlanif4]display this
#
interface Vlanif4
ip address 192.168.4.254 255.255.255.0
dhcp select relay
dhcp relay server-ip 192.168.5.253
dhcp relay server-ip 192.168.8.253
[sw1-Vlanif4]q
[sw1]sw2:
<sw2>
<sw2>sys
[sw2]int vlan
[sw2]int Vlanif 2
[sw2-Vlanif2]dhcp select relay
[sw2-Vlanif2]dhcp relay server-ip 192.168.7.253
[sw2-Vlanif2]dhcp relay server-ip 192.168.6.253
[sw2-Vlanif2]display this
#
interface Vlanif2
ip address 192.168.2.254 255.255.255.0
dhcp select relay
dhcp relay server-ip 192.168.7.253
dhcp relay server-ip 192.168.6.253
#
return
[sw2-Vlanif2]q
[sw2]int vlan
[sw2]int Vlanif 3
[sw2-Vlanif3]dhcp select relay
[sw2-Vlanif3]dhcp relay server-ip 192.168.7.253
[sw2-Vlanif3]dhcp relay server-ip 192.168.6.253
[sw2-Vlanif3]q
[sw2]int vlna
[sw2]int vl
[sw2]int Vlanif 4
[sw2-Vlanif4]dhcp select relay
[sw2-Vlanif4]dhcp relay server-ip 192.168.7.253
[sw2-Vlanif4]dhcp relay server-ip 192.168.6.253
[sw2-Vlanif4]q
[sw2]int Vlanif 4
[sw2-Vlanif4]display this
#
interface Vlanif4
ip address 192.168.4.254 255.255.255.0
dhcp select relay
dhcp relay server-ip 192.168.7.253
dhcp relay server-ip 192.168.6.253
#
return
[sw2-Vlanif4]q
[sw2]配置完之后还是不会通的要配置路由协议（ospf)
下面我们要在三层交换机跟路由器上要配置OSPF协议来转换数据,等我们将OSPF配置完成后这个网络就会通，下面是代码呈现：
R3：
<R3>sys
Enter system view, return user view with Ctrl+Z.
[R3]ospf 3 （创建OSPF3）
[R3-ospf-3]area 2 （划分组网区域2）
[R3-ospf-3-area-0.0.0.2]network 0.0.0.0 255.255.255.255（配置网络，我这里偷懒了直接允许转化所有的IP，但是在实际的配置的时候要根据实际的情况要配置）
R4：
[R4]ospf 4
[R4-ospf-4]area 2
[R4-ospf-4-area-0.0.0.2]netw
[R4-ospf-4-area-0.0.0.2]network 0.0.0.0 255.255.255.255
Sw1:
[sw1]ospf 1
[sw1-ospf-1]area 2
[sw1-ospf-1-area-0.0.0.2]network 0.0.0.0 255.255.255.255
Sw2:
[sw2]ospf 2
[sw2-ospf-2]area 2
[sw2-ospf-2-area-0.0.0.2]network 0.0.0.0 255.255.255.255