要求：

需求:R1-R2-R3-R4-R5运行RIPV2
R6-R7运行RIPV1
1.使用合理地址规划网络，各自创建环回接口
2.R1创建环回172.16.1.1/24172.16.2.1/24 172.16.3.1/24
3.要求R3使用R2访问R1环回
4.减少路由条自数量,增加路由传递安全性
5.R5创建一个环回模拟运营商,不能宣告
6. R1 telnet R2环回实际telnet到R7上
7.R6-R7路由器不能学习到达R1环回路由
8.全网可达

实现：

*R1上写入RIP
[r1]rip	
[r1-rip-1]version 2
[r1-rip-1]network 12.0.0.0
[r1-rip-1]network 14.0.0.0
[r1-rip-1]network 1.0.0.0
[r1-rip-1]network 172.16.0.0
*R2上写入RIP
[r2]rip
[r2-rip-1]version 2	
[r2-rip-1]network 12.0.0.0
[r2-rip-1]network 23.0.0.0
[r2-rip-1]network 2.0.0.0
*R3上写入RIP
[r3]rip
[r3-rip-1]v 2
[r3-rip-1]network 23.0.0.0	
[r3-rip-1]network 34.0.0.0
[r3-rip-1]network 3.0.0.0
*R4上写入RIP
[r4]rip
[r4-rip-1] v 2
[r4-rip-1]network 14.0.0.0
[r4-rip-1]network 34.0.0.0
[r4-rip-1]network 45.0.0.0
[r4-rip-1]network 46.0.0.0
[r4-rip-1]network 4.0.0.0

*R6上写入RIP
[r6]rip 
[r6-rip-1]v 1
[r6-rip-1]network 6.0.0.0
[r6-rip-1]network 46.0.0.0
[r6-rip-1]network 67.0.0.0
*R7上写入RIP
[r7]rip 
[r7-rip-1]v 1	
[r7-rip-1]network 7.0.0.0
[r7-rip-1]network 67.0.0.0

1，在R7上做aaa认证和Telnet服务。
[r7]aaa
[r7-aaa]local-user malihua privilege level 15 password cipher 123456
Info: Add a new user.
[r7-aaa]local-user malihua service-type telnet 
[r7]user-interface vty 0 4
[r7-ui-vty0-4]authentication-mode aaa
2，在R6上测试
<r6>telnet 7.7.7.7
Username:malihua
Password:
<r7>——登陆成功
3，在R2上做端口映射
[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]nat server protocol tcp global interface loopback 0 23 inside 7.7.7.7 23
4，在R2上做开销值
[r2]acl 2000
[r2-acl-basic-2000]rule permit source 7.0.0.0 0
[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]rip metricout 2000 10
5，在R4上做开销值
[r2]acl 2000
[r2-acl-basic-2000]rule permit source 12.0.0.0 0
[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]rip metricout 2000 10