一，实验拓扑
二，实验要求
1、R5为ISP，只能进行Ip地址配置，其所有地址均配为公有IP地址;
2、R1和R5间使用PPP的PAP认证，R5为主认证方; R2与R5之间使用ppp的cHAP认证，R5为主认证方;
R3与R5之间使用HDLC封装;
3、R1、82、R3构建一个MGRE环境，R1为中心站点，R1、R4间为点到点的GRE;
4、整个私有网络基本RIP全网可达；
5、所有Pc设置私有IP为源IP，可以访问R5环回,达到全网通。
三，实验思路
1，各路由器配IP地址
2，进行PAP认证,R5为主认证,R1为被认证
3，进行CHAP认证,R5为主认证,R2为被认证
4，R3、R5进行HDLC封装
5，使用静态缺省，使公网通
6，R1、R2和R3之间构建隧道------MGRE，
7，使用 RIP实现私网通
8，使用NAT协议
四，实验步骤
一，配置IP地址
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip add 192.168.1.254 24
[R1-GigabitEthernet0/0/0]int s4/0/0
[R1-Serial4/0/0]ip add 15.1.1.1 24
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip add 192.168.2.254 24
[R2-GigabitEthernet0/0/0]int s4/0/0
[R2-Serial4/0/0]ip add 25.1.1.2 24
[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip add 192.168.3.254 24
[R3-GigabitEthernet0/0/0]int s4/0/0
[R3-Serial4/0/0]ip add 35.1.1.3 24
[R4]int g0/0/0
[R4-GigabitEthernet0/0/0]ip add 45.1.1.4 24
[R4-GigabitEthernet0/0/0]int g0/0/1
[R4-GigabitEthernet0/0/1]ip add 192.168.4.254 24
[R5]int s4/0/1
[R5-Serial4/0/1]ip add 15.1.1.5 24
[R5-Serial4/0/1]int s3/0/1
[R5-Serial3/0/1]ip add 25.1.1.5 24
[R5-Serial3/0/1]int s4/0/0
[R5-Serial4/0/0]ip add 35.1.1.5 24
[R5-Serial4/0/0]int g0/0/0
[R5-GigabitEthernet0/0/0]ip add 45.1.1.5 24
[R5]int l0\n[R5-LoopBack0]ip add 5.5.5.5 24
二，PAP认证R5为主R1被
[R5]aaa
[R5-aaa]local-user wangdaye password cipher wdy12345
[R5-aaa]local-user wangdaye service-type ppp
[R5-aaa]quit
[R5]int s4/0/1
[R5-Serial4/0/1]ppp authentication-mode pap
[R5-Serial4/0/1]quit\n
[R1]int s4/0/0
[R1-Serial4/0/0]ppp pap local-user wangdaye password cipher wdy12345
[R1-Serial4/0/0]shutdown
[R1-Serial4/0/0]undo shutdown
测：在R1上pingR5上的地址
三，配置CHAP认证,R5为主,R2为被
[R5]int s3/0/1
[R5-Serial3/0/1]ppp authentication-mode chap
[R5-Serial3/0/1]quit[R2]int s4/0/0
[R2-Serial4/0/0]ppp chap user wangdaye
[R2-Serial4/0/0]ppp chap password cipher wdy12345
[R2-Serial4/0/0]shutdown
[R2-Serial4/0/0]undo shutdown
测：
四，R3heR5HDLC封装
[R3]int s4/0/0
[R3-Serial4/0/0]link-protocol hdlc
[R5]int s4/0/0
[R5-Serial4/0/0]link-protocol hdlc
测：
五，静态缺省公网通
[R1]ip route-static 0.0.0.0 0 15.1.1.5
[R2]ip route-static 0.0.0.0 0 25.1.1.5
[R3]ip route-static 0.0.0.0 0 35.1.1.5
[R4]ip route-static 0.0.0.0 0 45.1.1.5
六，R1、R2和R3间构建隧道---MGRE
[R1]int t0/0/0
[R1-Tunnel0/0/0]ip add 10.1.1.1 24
[R1-Tunnel0/0/0]tunnel-protocol gre p2mp
[R1-Tunnel0/0/0]source 15.1.1.1
[R1-Tunnel0/0/0]nhrp network-id 100\n
[R2]int t0/0/0
[R2-Tunnel0/0/0]ip add 10.1.1.2 24
[R2-Tunnel0/0/0]tunnel-protocol gre p2mp
[R2-Tunnel0/0/0]source Serial 4/0/0
[R2-Tunnel0/0/0]nhrp network-id 100
[R2-Tunnel0/0/0]nhrp entry 10.1.1.1 15.1.1.1 register
[R3]int t0/0/0
[R3-Tunnel0/0/0]ip add 10.1.1.3 24
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp
[R3-Tunnel0/0/0]source Serial 4/0/0
[R3-Tunnel0/0/0]nhrp network-id 100
[R3-Tunnel0/0/0]nhrp entry 10.1.1.1 15.1.1.1 register
R1和R4之间建---GRE
[R1]int t0/0/1
R1-Tunnel0/0/1]ip add 10.1.2.1 24
[R1-Tunnel0/0/1]tunnel-protocol gre
[R1-Tunnel0/0/1]source 15.1.1.1
[R1-Tunnel0/0/1]description 45.1.1.4
[R1-Tunnel0/0/1]quit
[R4]int t0/0/1
[R4-Tunnel0/0/1]ip add 10.1.2.4 24
R4-Tunnel0/0/1]tunnel-protocol gre
[R4-Tunnel0/0/1]source 45.1.1.4
[R4-Tunnel0/0/1]description 15.1.1.1
[R4-Tunnel0/0/1]quit
测试：R2,3,4 依次测试
七，通过RIP协议实现私网通
[R1]rip 1
[R1-rip-1]v 2
[R1-rip-1]undo summary
[R1-rip-1]net 192.168.1.0
[R1-rip-1]net 10.0.0.0 [R1-rip-1]quit
[R2]rip 1
[R2-rip-1]v 2
[R2-rip-1]undo summary
[R2-rip-1]net 192.168.2.0
[R2-rip-1]net 10.0.0.0 [R2-rip-1]quit
[R3]rip 1
[R3-rip-1]v 2
[R3-rip-1]undo summary
[R3-rip-1]net 192.168.3.0
[R3-rip-1]net 10.0.0.0 [R3-rip-1]quit
[R4]rip 1
[R4-rip-1]v 2
[R4-rip-1]undo summary
[R4-rip-1]net 192.168.4.0
[R4-rip-1]net 10.0.0.0
[R4-rip-1]quit
进入MGRE隧道，开启伪广播使GRE学习完路由
[R1]int Tunnel 0/0/0
[R1-Tunnel0/0/0]nhrp entry multicast dynamic
[R1-Tunnel0/0/0]undo rip split-horizon [R1-Tunnel0/0/0]quit
[R2]int t0/0/0
[R2-Tunnel0/0/0]undo rip split-horizon [R2-Tunnel0/0/0]quit\n\n[R3]int t0/0/0
[R3-Tunnel0/0/0]undo rip split-horizon [R3-Tunnel0/0/0]quit
测私网：
测全网通
8.配置NAT协议
[R1]acl 2000
[R1-acl-basic-2000]rule permit source 192.168.1.0 0.0.0.255
[R1-acl-basic-2000]quit
[R1]int s4/0/0
[R1-Serial4/0/0]nat outbound 2000
[R1-Serial4/0/0]quit
R2]acl 2000
[R2-acl-basic-2000]rule permit source 192.168.2.0 0.0.0.255
[R2-acl-basic-2000]quit\n[R2]int s4/0/0
[R2-Serial4/0/0]nat outbound 2000
[R2-Serial4/0/0]quit
[R3]acl 2000
[R3-acl-basic-2000]rule permit source 192.168.3.0 0.0.0.255
[R3-acl-basic-2000]quit
[R3]int s4/0/0
[R3-Serial4/0/0]nat outbound 2000
[R3-Serial4/0/0]quit
[R4]acl 2000
[R4-acl-basic-2000]rule permit source 192.168.4.0 0.0.0.255
[R4-acl-basic-2000]quit
[R4]int g0/0/0
[R4-GigabitEthernet0/0/0]nat outbound 2000
[R4-GigabitEthernet0/0/0]quit
测试：
