一、 实验目的：

二、拓扑图：

三、实验思路：

1、合理规划ip地址

         骨干：192.168.1.0/27
         R1:192.168.1.32/27
                          192.168.1.32/28
                          192.168.1.48/28
         R2:192.168.1.64/27
                          192.168.1.64/28
                          192.168.1.80/28
         R3:192.168.1.96/27
         R4:192.168.1.128/27
                          192.168.1.128/28
                          192.168.1.144/28
         R5:192.168.1.160/27

2、配置ip地址

3、配置缺省地址：

[R1]ip route-static 0.0.0.0 0 192.168.1.2
[R2]ip route-static 0.0.0.0 0 192.168.1.10
[R3]ip route-static 0.0.0.0 0 192.168.1.14
[R4]ip route-static 0.0.0.0 0 192.168.1.22
[R5]ip route-static 0.0.0.0 0 12.1.1.2

4、配置下一跳使得全网可达：

R1:

R2:

R3:

R4:

R5:

5、使用DHCP自动获取IP地址：

[R3]dhcp enable 
[R3]ip pool a
[R3-ip-pool-a]net 192.168.1.96 mask 27
[R3-ip-pool-a]gateway-list 192.168.1.97
[R3-ip-pool-a]dns-list 8.8.8.8
[R3-ip-pool-a]q
[R3]int e0/0/0
[R3-Ethernet0/0/0]dhcp select global

6、修改优先级：

[R4]ip route-static 0.0.0.0 0 192.168.1.22 preference 70
[R5]ip route-static 192.168.1.0 255.255.255.252 192.168.1.21 pr 70
[R5]ip route-static 192.168.1.4 255.255.255.252 192.168.1.21 pr 70
[R5]ip route-static 192.168.1.8 255.255.255.252 192.168.1.21 pr 70
[R5]ip route-static 192.168.1.12 255.255.255.252 192.168.1.21 pr 70
[R5]ip route-static 192.168.1.32 255.255.255.224 192.168.1.21 pr 70
[R5]ip route-static 192.168.1.64 255.255.255.224 192.168.1.21 pr 70
[R5]ip route-static 192.168.1.96 255.255.255.224 192.168.1.21 pr 70
[R5]ip route-static 192.168.1.128 255.255.255.224 192.168.1.21 pr 70

7、配置空接口防环：

[R1]ip route-static 0.0.0.0 0 192.168.1.2
[R2]ip route-static 0.0.0.0 0 192.168.1.10
[R3]ip route-static 0.0.0.0 0 192.168.1.14
[R4]ip route-static 0.0.0.0 0 192.168.1.18
[R5]ip route-static 0.0.0.0 0 1.1.1.2

8、端口映射：

[R5-GigabitEthernet0/0/2]nat static protocol tcp global current-interface 23 ins ide 192.168.1.1 30

9、开启远程登录服务：