GRE VPN和MGRE VPN综合练习
- 实验拓扑
- 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、R2、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、对四台PC和五台路由器进行IP地址的配置
2、R1和R5间使用PPP的PAP认证,R5为主认证方 R5上配置aaa服务创建用户及密码R1在接口上选择身份验证模式PAP
3、R2与R5之间使用ppp的CHAP认证,R5为主认证方 R5上配置aaa R2在接口上选择身份验证模式CHAP
4、分别在R3R5上做HDLC封装
5、将公网内的网络实现全网通
6、R1、R2、R3构建一个MGRE环境,R1为中心站点,
7、R1、R4间为点到点的GRE
8、使用rip动态路由协议使所有私网地址和隧道地址进行路由学习
9、在R1\R2\R3\R4上做NAT地址转换技术(一对多)
四、实验步骤
1、IP地址配置
R1
[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ip add 192.168.1.254/24
[r1-GigabitEthernet0/0/0]int s3/0/0
[r1-Serial3/0/0]ip add 15.1.1.1 24
R2
[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]
[r2-GigabitEthernet0/0/0]ip add 192.168.2.254 24
[r2-GigabitEthernet0/0/0]int s 3/0/1
[r2-Serial3/0/1]ip add 25.1.1.1 24
R3
[r3]int g 0/0/0
[r3-GigabitEthernet0/0/0]ip add 192.168.3.254 24
[r3-GigabitEthernet0/0/0]int s 4/0/0
[r3-Serial4/0/0]ip add 35.1.1.1 24
R4
[r4]int g 0/0/0
[r4-GigabitEthernet0/0/0]ip add 192.168.4.254 24
[r4-GigabitEthernet0/0/0]int g 0/0/1
[r4-GigabitEthernet0/0/1]ip add 45.1.1.1 24
R5
[ISP]int Serial 3/0/0
[ISP-Serial3/0/0]ip add 15.1.1.2 24
[ISP-Serial3/0/0]int s 3/0/1
[ISP-Serial3/0/1]ip add 25.1.1.2 24
[ISP-Serial3/0/1]int s 4/0/0
[ISP-Serial4/0/0]ip add 35.1.1.2 24
[ISP-Serial4/0/0]int g 0/0/1
[ISP-GigabitEthernet0/0/1]ip add 45.1.1.2 24
[ISP-GigabitEthernet0/0/1]int l 0
[ISP-LoopBack0]ip add 5.5.5.5 24
2、R1和R5间使用PPP的PAP认证,R5为主认证方
首先需要在R5上通过aaa服务建立用户和密码,进入对应接口选择身份验证模式
[ISP]aaa
[ISP-aaa]local-user liu password cipher 111
[ISP-aaa]local-user liu service-type ppp
[ISP]int Serial 3/0/0
[ISP-Serial3/0/0]ppp authentication-mode pap
然后我们先不在R1上做认证,重启链路看看效果
可以看到因为R1上没做pap认证导致接口的链路层协议down
所以在R1上也要做pap认证
[r1-Serial3/0/0]ppp pap local-user liu password cipher 111
然后我们再来测试一下
这里我们可以很明显的观察到物理层和数据链路层双up
3、R2与R5之间使用ppp的CHAP认证,R5为主认证方
首先需要在R5上通过aaa服务建立用户和密码,进入对应接口选择身份验证模式
[ISP]aaa
[ISP-aaa]local-user liu password cipher 111
[ISP-aaa]local-user liu service-type ppp
[ISP]int s 3/0/1
[ISP-Serial3/0/1]ppp authentication-mode chap
然后再R2上做chap认证
[r2]int s 3/0/1
[r2-Serial3/0/1]ppp chap user liu
[r2-Serial3/0/1]ppp chap password cipher 111
4、R3与R5之间使用HDLC封装
[ISP]int s 4/0/0
[ISP-Serial4/0/0]link-protocol hdlc
Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]
:y
[r3]int s 4/0/0
[r3-Serial4/0/0]link-protocol hdlc
Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]
:y
5、将公网内的网络实现全网通
在R1\R2\R3\R4做一条指向公网的缺省路由
[r1]ip route-static 0.0.0.0 0 15.1.1.2
[r2]ip route-static 0.0.0.0 0 25.1.1.2
[r3]ip route-static 0.0.0.0 0 35.1.1.2
[r4]ip route-static 0.0.0.0 0 45.1.1.2
6、R1、R2、R3构建一个MGRE环境,R1为中心站点,
1)首先要分别在R1\R2\R3上做隧道接口
R1
[r1]int Tunnel 0/0/0
[r1-Tunnel0/0/0]ip add 10.1.1.1 24
[r1-Tunnel0/0/0]tunnel-protocol
[r1-Tunnel0/0/0]tunnel-protocol gre p2mp
[r1-Tunnel0/0/0]source 15.1.1.1
Jul 25 2024 21:32:15-08:00 r1 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
on the interface Tunnel0/0/0 has entered the UP state.
[r1-Tunnel0/0/0]nhrp network-id 100
R2、
[r2]int Tunnel 0/0/0
[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 3/0/1
Jul 25 2024 21:34:48-08:00 r2 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
on the interface Tunnel0/0/0 has entered the UP state.
[r2-Tunnel0/0/0]nhrp network-id 100
[r2-Tunnel0/0/0]nhrp entry 10.1.1.1 15.1.1.1 register
R3、
[r3]int Tunnel 0/0/0
[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
Jul 25 2024 21:39:50-08:00 r3 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
on the interface Tunnel0/0/0 has entered the UP state.
[r3-Tunnel0/0/0]nhrp network-id 100
[r3-Tunnel0/0/0]nhrp entry 10.1.1.1 15.1.1.1 register
2)用rip动态路由协议将私网网段搞通
[r2]rip 1
[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
其他同上
3)在R1上开启伪广播
[r1]int Tunnel 0/0/0
[r1-Tunnel0/0/0]nhrp entry multicast dynamic
4)关闭rip的水平分割
[r1-Tunnel0/0/0]undo rip split-horizon
7、R1、R4间为点到点的GRE
1)配置gre所需的隧道接口
[r1]int Tunnel 0/0/1
[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]destination 45.1.1.1
Jul 25 2024 23:27:01-08:00 r1 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
on the interface Tunnel0/0/1 has entered the UP state.
R4
[r4]int Tunnel 0/0/1
[r4-Tunnel0/0/1]ip add 10.1.2.2 24
[r4-Tunnel0/0/1]tunnel-protocol gre
[r4-Tunnel0/0/1]source 45.1.1.1
[r4-Tunnel0/0/1]destination 15.1.1.1
Jul 25 2024 23:28:05-08:00 r4 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
on the interface Tunnel0/0/1 has entered the UP state.
8、所有Pc设置私有IP为源IP,可以访问R5环回,达到全网通。
1)使用NAT技术,将私网转换成公网(一对多)
2)首先需要抓取私网流量
R1
[r1]acl 2000
[r1-acl-basic-2000]rule permit source 192.168.1.0 0.0.0.255
[r1-acl-basic-2000]q
[r1]int s 3/0/0
[r1-Serial3/0/0]nat outbound 2000
R2
[r2]acl 2000
[r2-acl-basic-2000]rule permit source 192.168.2.0 0.0.0.255
[r2-acl-basic-2000]q
[r2]int s 3/0/1
[r2-Serial3/0/1]nat outbound 2000
R3
[r3]acl 2000
[r3-acl-basic-2000]rule permit source 192.168.3.0 0.0.0.255
[r3-acl-basic-2000]q
[r3]int s 4/0/0
[r3-Serial4/0/0]nat outbound 2000
R4
[r4]acl 2000
[r4-acl-basic-2000]rule permit source 192.168.4.0 0.0.0.255
[r4-acl-basic-2000]q
[r4]int g 0/0/1
[r4-GigabitEthernet0/0/1]nat outbound 2000
测试: