VPN+GRE+MGRE
2026/8/14 17:30:03 网站建设 项目流程
  • 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。

实验思路:

先把IP地址配好这是最基础的一步。让公网能通,配完R1能ping通R2/R3/R4的公网IP,说明公网通了。

配链路层协议:R1-R5用PAP认证(R1输账号密码),R2-R5用CHAP认证(更安全),R3-R5改成HDLC封装。配完串口协议变成UP。

建隧道:R1(中心),R2和R3(分支)搭MGRE。

跑RIP路由:在所有隧道口和业务口开启RIP,让各设备互相学习私网路由。配完每台设备都能看到去往其他网段的路由。

做NAT让电脑上网:R1到R4各自配ACL 2000放行自己的私网段,配完PC能ping通5.5.5.5上网成功了。

最后测一遍:PC之间互ping通,PC能访问R5环回。


  • 实验配置
  1. R1的配置

[Huawei]sys R1

[R1]interface GigabitEthernet0/0/0

[R1-GigabitEthernet0/0/0]ip address 192.168.1.254 255.255.255.0

[R1-GigabitEthernet0/0/0]interface Serial4/0/0

[R1-Serial4/0/0]link-protocol ppp

[R1-Serial4/0/0]ip address 15.1.1.1 255.255.255.0

[R1-Serial4/0/0]ppp pap local-user r1 password cipher 123456

[R1-Serial4/0/0]interface Tunnel0/0/0

[R1-Tunnel0/0/0]ip address 192.168.100.1 255.255.255.0

[R1-Tunnel0/0/0]tun

[R1-Tunnel0/0/0]tunnel-protocol gre

[R1-Tunnel0/0/0]tunnel-protocol gre p2mp

[R1-Tunnel0/0/0]source Serial4/0/0

[R1-Tunnel0/0/0]nhrp

[R1-Tunnel0/0/0]nhrp me

[R1-Tunnel0/0/0]nhrp ne

[R1-Tunnel0/0/0]nhrp network-id 100

[R1-Tunnel0/0/0]nhrp

[R1-Tunnel0/0/0]nhrp autjem

[R1-Tunnel0/0/0]nhrp authrn

[R1-Tunnel0/0/0]nhrp authen

[R1-Tunnel0/0/0]nhrp authentication cip

[R1-Tunnel0/0/0]nhrp authentication cipher 123456

[R1-Tunnel0/0/0]q

[R1]inter

[R1]interface Tun

[R1]interface Tunnel 0/0/1

[R1-Tunnel0/0/1]ip address 192.168.3.1 255.255.255.0

[R1-Tunnel0/0/1]tunn

[R1-Tunnel0/0/1]tunnel-protocol gre

[R1-Tunnel0/0/1]sour

[R1-Tunnel0/0/1]source 15.1.1.1

[R1-Tunnel0/0/1]des

[R1-Tunnel0/0/1]desti

[R1-Tunnel0/0/1]destination 45.1.1.1

[R1-Tunnel0/0/1]q

[R1]rip 1

[R1-rip-1]vers

[R1-rip-1]version 2

[R1-rip-1]network 192.168.1.0

[R1-rip-1]network 192.168.100.0

[R1-rip-1]network 192.168.3.0

[R1-rip-1]q

[R1]ip route-static 0.0.0.0 0 15.1.1.2

[R1]acl number 2000

[R1-acl-basic-2000]rule 5 permit source 192.168.1.0 0.0.0.255

[R1-acl-basic-2000]interface Serial4/0/0

[R1-Serial4/0/0]nat outbound 2000

[R1-Serial4/0/0]q

2、R2的配置

[Huawei]sys R2

[R2]inter

[R2]interface Gi

[R2]interface GigabitEthernet0/0/0

[R2-GigabitEthernet0/0/0]ip address 192.168.2.254 255.255.255.0

Aug 12 2026 21:48:04-08:00 R2 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP

on the interface GigabitEthernet0/0/0 has entered the UP state.

[R2-GigabitEthernet0/0/0]interface Serial4/0/0

[R2-Serial4/0/0]link-s

[R2-Serial4/0/0]link-p

[R2-Serial4/0/0]link-protocol ppp

[R2-Serial4/0/0]ip address 25.1.1.1 255.255.255.0

[R2-Serial4/0/0]ppp authentication-mode chap

[R2-Serial4/0/0]ppp chap user r2

[R2-Serial4/0/0]ppp chap password cipher 123456

[R2-Serial4/0/0]q

[R2]inte

[R2]interface Tunn

[R2]interface Tunnel 0/0/0

[R2-Tunnel0/0/0]ip address 192.168.100.2 255.255.255.0

[R2-Tunnel0/0/0]tunnel-p

[R2-Tunnel0/0/0]tunnel-protocol

[R2]interface Tunnel0/0/0

[R2-Tunnel0/0/0]tunnel-protocol gre p2mp

[R2-Tunnel0/0/0]source Serial4/0/0

[R2-Tunnel0/0/0]nhrp

[R2-Tunnel0/0/0]nhrp net

[R2-Tunnel0/0/0]nhrp network-id 100

[R2-Tunnel0/0/0]nhrp authentication cipher 123456

[R2-Tunnel0/0/0]nhrp entry 192.168.100.1 15.1.1.1 register

[R2-Tunnel0/0/0]rip 1

[R2-rip-1]version 2

[R2-rip-1]network 192.168.2.0

[R2-rip-1]network 192.168.100.0

[R2-rip-1]ip route-static 0.0.0.0 0 25.1.1.2

[R2]ip route-static 0.0.0.0 0 25.1.1.2

Error: The route already exists.

[R2]acl number 2000

[R2-acl-basic-2000]rule 5 permit source 192.168.2.0 0.0.0.255

[R2-acl-basic-2000]interface Serial4/0/0

[R2-Serial4/0/0]nat outbound 2000

[R2-Serial4/0/0]q

[R2]q

3、R3的配置

[Huawei]sysname R3

[R3]interface GigabitEthernet0/0/0

[R3-GigabitEthernet0/0/0]ip address 192.168.3.254 255.255.255.0

Aug 12 2026 22:06:51-08:00 R3 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP

on the interface GigabitEthernet0/0/0 has entered the UP state.

[R3-GigabitEthernet0/0/0]q

[R3]inter

[R3]interface S

[R3]interface Serial 4/0/0

[R3-Serial4/0/0]link-protocol hdlc

Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]

:Y

Aug 12 2026 22:07:21-08:00 R3 %%01IFNET/4/CHANGE_ENCAP(l)[1]:The user performed

the configuration that will change the encapsulation protocol of the link and th

en selected Y.

[R3-Serial4/0/0]ip address 35.1.1.1 255.255.255.0

[R3-Serial4/0/0]q

[R3]interface Tunnel0/0/0

[R3-Tunnel0/0/0]ip address 192.168.100.3 255.255.255.0

[R3-Tunnel0/0/0]tun

[R3-Tunnel0/0/0]tunnel-protocol ger

[R3-Tunnel0/0/0]tunnel-protocol gre

[R3-Tunnel0/0/0]tunnel-protocol gre p2mp

[R3-Tunnel0/0/0]source Serial4/0/0

Aug 12 2026 22:07:56-08:00 R3 %%01IFNET/4/LINK_STATE(l)[7]:The line protocol IP

on the interface Tunnel0/0/0 has entered the UP state.

[R3-Tunnel0/0/0]

[R3-Tunnel0/0/0]nhrp network-id 100

[R3-Tunnel0/0/0]nhrp authentication cipher 123456

[R3-Tunnel0/0/0]nhrp entry 192.168.100.1 15.1.1.1 register

[R3-Tunnel0/0/0]q

[R3]rip 1

[R3-rip-1]version 2

[R3-rip-1]network 192.168.3.0

[R3-rip-1]network 192.168.100.0

[R3-rip-1]q

[R3]ip rout

[R3]ip route-str

[R3]ip route-sta

[R3]ip route-static 0.0.0.0 0 35.1.1.2

[R3]acl number 2000

[R3-acl-basic-2000]rule 5 permit source 192.168.3.0 0.0.0.255

[R3-acl-basic-2000]interface Serial4/0/0

[R3-Serial4/0/0]nat outbound 2000

4、R4的配置

[R4]interface GigabitEthernet0/0/1

[R4-GigabitEthernet0/0/1]ip address 192.168.4.254 255.255.255.0

Aug 12 2026 22:22:37-08:00 R4 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP

on the interface GigabitEthernet0/0/1 has entered the UP state.

[R4-GigabitEthernet0/0/1]interface GigabitEthernet0/0/0

[R4-GigabitEthernet0/0/0]ip address 45.1.1.1 255.255.255.0

Aug 12 2026 22:22:57-08:00 R4 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP

on the interface GigabitEthernet0/0/0 has entered the UP state.

[R4-GigabitEthernet0/0/0]interface Tunnel0/0/0

[R4-Tunnel0/0/0]ip address 192.168.3.2 255.255.255.0

[R4-Tunnel0/0/0]tunn

[R4-Tunnel0/0/0]tunnel-protocol gre

[R4-Tunnel0/0/0]source

[R4-Tunnel0/0/0]source 45.1.1.1

[R4-Tunnel0/0/0]destination 15.1.1.1

[R4-Tunnel0/0/0]q

[R4]rip 1

[R4-rip-1]ver

[R4-rip-1]version

[R4-rip-1]version 2

[R4-rip-1]net

[R4-rip-1]network 192.168.4.0

[R4-rip-1]network 192.168.3.0

[R4-rip-1]q

[R4]ip route-static 0.0.0.0 0 45.1.1.2

[R4]

Aug 12 2026 22:24:27-08:00 R4 %%01IFNET/4/LINK_STATE(l)[2]:The line protocol IP

on the interface Tunnel0/0/0 has entered the UP state.

[R4]acl number 2000

[R4-acl-basic-2000]rule 5 per

[R4-acl-basic-2000]rule 5 permit sour

[R4-acl-basic-2000]rule 5 permit source 192.168.4.0 0.0.0.255

[R4-acl-basic-2000]q

[R4]interface GigabitEthernet0/0/0

[R4-GigabitEthernet0/0/0]nat outbound 2000

[R4-GigabitEthernet0/0/0]q

[R4]q

[R4]int g0/0/0

[R4-GigabitEthernet0/0/0]ip add 45.0.0.4 24

[R4-GigabitEthernet0/0/0]int l0

[R4-LoopBack0]ip add 192.168.4.4 24

5、R5的配置

Huawei]sysname R5

[R5]interface Loopback0

[R5-LoopBack0]ip address 5.5.5.5 255.255.255.0

[R5-LoopBack0]interface Serial4/0/0

[R5-Serial4/0/0]link-

[R5-Serial4/0/0]link-protocol hdlc

Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]

:Y

Aug 12 2026 22:28:52-08:00 R5 %%01IFNET/4/CHANGE_ENCAP(l)[0]:The user performed

the configuration that will change the encapsulation protocol of the link and th

en selected Y.

[R5]interface Serial4/0/0

[R5-Serial4/0/0]ip address 35.1.1.2 255.255.255.0

[R5-Serial4/0/0]q

[R5]interface Serial4/0/1

[R5-Serial4/0/1]link-protocol ppp

[R5-Serial4/0/1]ip address 15.1.1.2 255.255.255.0

[R5-Serial4/0/1]

Aug 12 2026 22:38:57-08:00 R5 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol PPP

IPCP on the interface Serial4/0/1 has entered the UP state.

[R5-Serial4/0/1]ppp authentication-mode pap

[R5-Serial4/0/1]interface Serial3/0/1

[R5-Serial3/0/1]link-protocol ppp

[R5-Serial3/0/1]ip address 25.1.1.2 255.255.255.0

[R5-Serial3/0/1]

Aug 12 2026 22:39:35-08:00 R5 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol PPP

IPCP on the interface Serial3/0/1 has entered the UP state.

[R5-Serial3/0/1]ppp authentication-mode chap

[R5-Serial3/0/1]interface GigabitEthernet0/0/0

[R5-GigabitEthernet0/0/0]ip address 45.1.1.2 255.255.255.0

Aug 12 2026 22:39:47-08:00 R5 %%01IFNET/4/LINK_STATE(l)[2]:The line protocol IP

on the interface GigabitEthernet0/0/0 has entered the UP state.

[R5-GigabitEthernet0/0/0]q

[R5]aaa

[R5-aaa]loce

[R5-aaa]loca

[R5-aaa]local-user r1 passwor

[R5-aaa]local-user r1 password cip

[R5-aaa]local-user r1 password cipher 123456

Info: Add a new user.

[R5-aaa]loce

[R5-aaa]loca

[R5-aaa]local-user r1 servi

[R5-aaa]local-user r1 service-type ppp

[R5-aaa]local-user r2 password cipher 123456

Info: Add a new user.

[R5-aaa]local-user r2 service-type ppp

[R5-aaa]q

[R5]q

配置各个PC

  1. 测试:私网互通
  2. 测试:访问公网

3、NAT配置

4、MGRE注册

5、R1PAP认证

6、R2CHAP认证

7、接口状态

用了display ip interface brief命令发现所有配置接口Physical和Protocol均为UP

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