[网络协议]MGRE综合

题目：

拓扑结构：

公网ip：

12.0.0.0 24

15.0.0.0 24

20.0.0.0 24

25.0.0.0 24

实验思路：

1、配置ip地址

2、根据要求进行认证，修改r3与r5的协议

3、配置MGRE环境，以r1位中心，r2 ，r3为分支

4、r1与r4配置点对点管道

5、在各个路由器上启动rip协议（公网ip地址不宣告）

6、用easy nat 是电脑能访问r5环回

配置命令：

配置各个接口ip

r1

interface Serial4/0/0

ip address 12.0.0.1 255.255.255.0?

interface GigabitEthernet0/0/0

?ip address 1.1.1.2 255.255.255.0?

r2 r3 r4 r5依次配置

r1与r5ppp认证的pap认证（r5为主认证方）

r5

[r5]local-user hpc?password cipher 123

[r5local-user changan service-type ppp

[r2-Serial3/0/0]ppp authentication-mode pap

r1

[r1-Serial4/0/0]ppp pap local-user hpc password cipher 123（要重启端口验证）

r2与r5ppp认证的chap认证（r5为主认证方）

[r2-Serial3/0/1]ppp authentication-mode chap

[r2-Serial4/0/0]ppp chap user hpc

[r2-Serial4/0/0]ppp chap password cipher 123

r3与r5采用hdlc封装（2遍的协议都要修改）

[r3-Serial4/0/0]link-protocol hdlc

[r5-Serial4/0/0]link-protocol hdlc

构建MGRE环境（r1为中心站点）

写缺省指向r5

ip route-static 0.0.0.0 0 12.0.0.2
ip route-static 0.0.0.0 0 15.0.0.2

ip route-static 0.0.0.0 0?20.0.0.2
ip route-static 0.0.0.0 0 25.0.0.2

建立r1与r4的管道

r1

[r1]int Tunnel 0/0/0

[r1-Tunnel0/0/0]ip address 10.1.1.1 24

[r1-Tunnel0/0/0]tunnel-protocol gre

[r1-Tunnel0/0/0]source 12.0.0.1

[r1-Tunnel0/0/0]destination 25.0.0.1

r4

[r1]int Tunnel 0/0/0

[r1-Tunnel0/0/0]ip address 10.1.1.2?24

[r1-Tunnel0/0/0]tunnel-protocol gre

[r1-Tunnel0/0/0]source 25.0.0.1

[r1-Tunnel0/0/0]destination 12.0.0.1

建立r1与r2 r3的MGRE环境

[r1]int t 0/0/1

[r1-Tunnel0/0/1]ip address 10.1.2.1 24

[r1-Tunnel0/0/1]tunnel-protocol gre p2mp?

[r1-Tunnel0/0/1]source 12.0.0.1?

[r1-Tunnel0/0/1]nhrp network-id 100?

[r1-Tunnel0/0/1]nhrp entry multicast dynamic

[r1-Tunnel0/0/1]undo rip split-horizon

r2

[r2]int t 0/0/0

[r2-Tunnel0/0/0]ip address 10.1.2.2 24

[r2-Tunnel0/0/0]tunnel-protocol gre p2mp

[r2-Tunnel0/0/0]source?interface Serial4/0/0

[r2-Tunnel0/0/0]nhrp network-id 100?

[r2-Tunnel0/0/0]nhrp entry 10.1.2.1 12.0.0.1 register

r3

[r3]int t 0/0/0

[r3-Tunnel0/0/0]ip address 10.1.2.3 24

[r3-Tunnel0/0/0]tunnel-protocol gre p2mp

[r3-Tunnel0/0/0]source?interface Serial4/0/0

[r3-Tunnel0/0/0]nhrp network-id 100?

[r3-Tunnel0/0/0]nhrp entry 10.1.2.1 12.0.0.1 register

在r1 r2 r3 r4上启动rip

r1

rip 1
?version 2
?network 1.0.0.0
?network 10.0.0.0
r2

rip 1
?version 2
?network 2.0.0.0
?network 10.0.0.0
r3

rip 1
version 2
network 3.0.0.0
network 10.0.0.0

r4

rip 1
?version 2
?network 10.0.0.0
?network 4.0.0.0

用nat使电脑能ping通r5环回

r1

acl? 2000 ?
?rule 5 permit source 1.1.1.0 0.0.0.255

interface Serial4/0/0
?nat outbound 2000

r2、r3、r4依次宣告环回并在接口调用

实验结果图：

pc1

?pc:4：

?pc2：

?pc：

?