各个路由器配置
R1
配置IP
[R1-GigabitEthernet0/0/0]ip add 192.168.1.2 24
[R1-Serial4/0/0]ip add 15.1.1.1 24
配置缺省
[R1]ip route-static 0.0.0.0 0 15.1.1.2
接受认证
[R1-Serial4/0/1]ppp pap local-user tao password cipher tao
配置隧道地址
[R1-Tunnel0/0/0]ip add 10.1.2.1 24
选择协议
[R1-Tunnel0/0/0]tunnel-protocol gre p2mp
封装接口
[R1-Tunnel0/0/0]source Serial 4/0/0
加入100域
[R1-Tunnel0/0/0]nhrp network-id 100
实现RIP全网可达
[r1]int t 0/0/0
[r1-Tunnel0/0/0]nhrp entry multicast dynamic
[r1-Tunnel0/0/0]q
[r1]rip
[r1-rip-1]v 2
[r1-rip-1]undo summary
[r1-rip-1]network 192.168.1.0
[r1-rip-1]network 10.0.0.0
[r1-rip-1]q
[r1]int t 0/0/0
[r1-Tunnel0/0/0]undo rip split-horizon
配置NAT
[r1]acl 2000
[r1-acl-basic-2000]rule permit source 192.168.1.0 0.0.0.255
[r1]int s 4/0/0
[r1-Serial4/0/0]nat outbound 200
R2
配置IP
[R2-GigabitEthernet0/0/0]ip add 192.168.2.2 24
[R2-Serial4/0/0]ip add 25.1.1.2 24
配置缺省
[R2]ip route-static 0.0.0.0 0 25.1.1.1
接受认证
[R2-Serial4/0/0]ppp chap user xun
[R2-Serial4/0/0]ppp chap password cipher xun
配置隧道地址
[R2-Tunnel0/0/0]ip add 10.1.2.2 24
选择协议
[R2-Tunnel0/0/0]tunnel-protocol gre p2mp
封装接口
[R2-Tunnel0/0/0]source Serial 4/0/0
加入100域
[R2-Tunnel0/0/0]nhrp network-id 100
实现RIP全网可达
[r2]rip
[r2-rip-1]v 2
[r2-rip-1]undo summary
[r2-rip-1]network 192.168.2.0
[r2-rip-1]network 10.0.0.0
配置NAT
[r2]acl 2000
[r2-acl-basic-2000]rule permit source 192.168.2.0 0.0.0.255
[r2]int s 4/0/0
[r2-Serial4/0/0]nat outbound 2000
R3
配置IP
[R3-GigabitEthernet0/0/0]ip add 192.168.3.2 24
[R3-Serial4/0/0]ip add 35.1.1.2 24
配置缺省
[R3]ip route-static 0.0.0.0 0 35.1.1.1
进行HDLC封装
[R3-Serial4/0/0]link-protocol hdlc
配置隧道地址
[R3-Tunnel0/0/0]ip add 10.1.2.3 24
选择协议
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp
封装接口
[R3-Tunnel0/0/0]source Serial 4/0/0
加入100域
[R3-Tunnel0/0/0]nhrp network-id 100
实现RIP全网可达
[r3]rip
[r3-rip-1]v 2
[r3-rip-1]undo summary
[r3-rip-1]network 192.168.3.0
[r3-rip-1]network 10.0.0.0
配置NAT
[r3]acl 2000
[r3-acl-basic-2000]rule permit source 192.168.3.0 0.0.0.255
[r3]int s 4/0/0
[r3-Serial4/0/0]nat outbound 2000
R4
配置IP
[R4-GigabitEthernet0/0/1]ip add 192.168.4.2 24
[R4-GigabitEthernet0/0/0]ip add 45.1.1.2 24
配置缺省
[R4]ip route-static 0.0.0.0 0 45.1.1.1
配置隧道地址
[r4]int t 0/0/1
[r4-Tunnel0/0/1]ip add 10.1.1.4 24
[r4-Tunnel0/0/1]tunnel-protocol gre
[r4-Tunnel0/0/1]source 45.1.1.4
[r4-Tunnel0/0/1]destination 15.1.1.1
实现RIP全网可达
[r4]rip
[r4-rip-1]v 2
[r4-rip-1]undo summary
[r4-rip-1]network 192.168.4.0
[r4-rip-1]network 10.0.0.0
配置NAT
[r4]acl 2000
[r4-acl-basic-2000]rule permit source 192.168.2.0 0.0.0.255
[r4]int g 0/0/0
[r4-GigabitEthernet0/0/0]nat outbound 2000
R5
配置IP
[R5-LoopBack0]ip add 5.5.5.5 24
[R5-Serial4/0/1]ip add 15.1.1.2 24
[R5-Serial3/0/1]ip add 25.1.1.1 24
[R5-Serial4/0/0]ip add 35.1.1.1 24
[R5-GigabitEthernet0/0/0]ip add 45.1.1.1 24
进入aaa模式，添加用户，密码
[R5-aaa]local-user tao password cipher tao（与R1）
[R5-aaa]local-user xun password cipher xun（与R2）
选择认证方式
[R5-Serial4/0/1]ppp authentication-mode pap
[R5-Serial3/0/1]ppp authentication-mode CHAP
进行HDLC封装
[R5-Serial4/0/0]link-protocol hdlc