使用中继路由完成DHCP实现客户机互通

原創

Ora.

2020-05-26 14:58

根据图示拓扑图，完成图中给出的条件，完成客户机获取IP，且各客户机可以互通

设置客户机PC1-5 ip配置为DHCP
例：PC1

框选图内全部设备，点击启动

理清思路，将该拓扑图理解成三个部分，方便后期命令的输入，也便于学习

区域①的命令
首先设置二层交换机SW1
创建vlan10 20，为vlan10 20划分端口，1、3口划分vlan10，2、4口划分给vlan20

[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 e0/0/3
[SW1-Ethernet0/0/3]p l a
[SW1-Ethernet0/0/3]p d v 10

[SW1-Ethernet0/0/3]int e0/0/2
[SW1-Ethernet0/0/2]p l a
[SW1-Ethernet0/0/2]p d v 20

[SW1-Ethernet0/0/2]int e0/0/4
[SW1-Ethernet0/0/4]p l a
[SW1-Ethernet0/0/4]p d v 20

为SW1与R1相连的g0/0/1口设置trunk，允许通过全部vlan

[SW1]int g0/0/1
[SW1-GigabitEthernet0/0/1]p l t
[SW1-GigabitEthernet0/0/1]p t a v all

到此，二层交换机SW1的命令结束，区域①结束

开始区域②的部分

设置路由器R3，给端口设置ip，开始DHCP服务，并将DHCP分配工作指向IP地址14.0.0.2

[Huawei]
[Huawei]sys R3
[R3]dhcp enable
[R3]int g0/0/3
[R3-GigabitEthernet0/0/3]ip add 15.0.0.1 24
[R3-GigabitEthernet0/0/3]dhcp select relay
[R3-GigabitEthernet0/0/3]dhcp relay server-ip 14.0.0.2

顺手把端口 g0/0/2的ip分配一下
[R3-GigabitEthernet0/0/2]ip add 12.0.0.2 24

区域②的步骤完成，接下来做区域③，区域③的命令较为繁琐，要细心的做

路由器R1的命令，第一步分配端口的ip
sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys R1
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip add 14.0.0.1 24
[R1-GigabitEthernet0/0/0]int g0/0/2
[R1-GigabitEthernet0/0/2]ip add 12.0.0.1 24
接下来开启DHCP服务
[R1]dhcp enable

给g0/0/1端口做单臂路由.10 .20
[R1]int g0/0/1.10
[R1-GigabitEthernet0/0/1.10]d t v 10
[R1-GigabitEthernet0/0/1.10]ip add 192.168.10.1
[R1-GigabitEthernet0/0/1.10]a b e
[R1-GigabitEthernet0/0/1.10]dhcp select relay
[R1-GigabitEthernet0/0/1.10]dhcp relay server-ip 14.0.0.2

[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 relay
[R1-GigabitEthernet0/0/1.20]dhcp relay server-ip 14.0.0.2

设置默认路由，吓一跳端口是R3的g0/0/2
[R1]ip route-static 0.0.0.0 0.0.0.0 12.0.0.2

设置路由器R2的命令，划分ip地址池，且允许DHCP服务

sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys R2
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip add 14.0.0.2 24

划分地址池 15 网段
[R2]ip pool DHCP15.0.0.0
Info:It’s successful to create an IP address pool.
[R2-ip-pool-DHCP15.0.0.0]network 15.0.0.1 mask 24
[R2-ip-pool-DHCP15.0.0.0]network 15.0.0.1 mask 24
[R2-ip-pool-DHCP15.0.0.0]gateway-list 15.0.0.1
[R2-ip-pool-DHCP15.0.0.0]dns-list 8.8.8.8 2.2.2.2

根据要求，需要移出100-254，给PC5划分ip为.88，先查看PC5的mac地址

继续在路由器R3的地址池DHCP15中输入命令
移除100-254
[R2-ip-pool-DHCP15.0.0.0]excluded-ip-address 15.0.0.100 15.0.0.254
绑定mac地址
[R2-ip-pool-DHCP15.0.0.0]static-bind ip-address 15.0.0.88 mac-address 5489-98A
9-1BDE

划分DHCP vlan 10和20的地址池
[R2]ip pool DHCPvlan10
Info:It’s successful to create an IP address pool.
[R2-ip-pool-DHCPvlan10]net
[R2-ip-pool-DHCPvlan10]network 192.168.10.0 mask 24
[R2-ip-pool-DHCPvlan10]gateway-list 192.168.10.1
[R2-ip-pool-DHCPvlan10]dns-list 8.8.8.8 2.2.2.2

[R2]ip pool DHCPvlan20
Info:It’s successful to create an IP address pool.
[R2-ip-pool-DHCPvlan20]net
[R2-ip-pool-DHCPvlan20]network 192.168.20.0 .mask 24
[R2-ip-pool-DHCPvlan20]gateway-list 192.168.20.1
[R2-ip-pool-DHCPvlan20]dns-list 8.8.8.8 2.2.2.2