L2TP VPN典型组网配置案例3（远程系统通过PPPOE拨号后再进行L2TP VPN拨号）

1、第一阶段调试（基础网络配置）：

R1：

<H3C>sys

System View: return to User View with Ctrl+Z.

[H3C]sysname R1

[R1]local-user ninglihua class network

New local user added.

[R1-luser-network-ninglihua]password simple ninglihua

[R1-luser-network-ninglihua]service-type ppp

[R1-luser-network-ninglihua]quit

[R1]domain name system

[R1-isp-system]authentication ppp local

[R1-isp-system]quit

[R1]ip pool ninglihua 192.168.10.2 192.168.10.100

[R1]ip pool ninglihua gateway 192.168.10.1

[R1]int Virtual-Template 1

[R1-Virtual-Template1]ip address 192.168.10.1 255.255.255.0

[R1-Virtual-Template1]ppp authentication pap domain system

[R1-Virtual-Template1]remote address pool ninglihua

[R1-Virtual-Template1]quit

[R1]int gi 0/0

[R1-GigabitEthernet0/0]pppoe-server bind virtual-template 1

[R1-GigabitEthernet0/0]quit

[R1]int gi 0/1

[R1-GigabitEthernet0/1]des <connect to ISP>

[R1-GigabitEthernet0/1]ip address 202.1.100.2 30

[R1-GigabitEthernet0/1]nat outbound

[R1-GigabitEthernet0/1]quit

[R1]ip route-static 0.0.0.0 0.0.0.0 202.1.100.1

ISP：

<H3C>sys

System View: return to User View with Ctrl+Z.

[H3C]sysname ISP

[ISP]int gi 0/0

[ISP-GigabitEthernet0/0]des <connect to R1>

[ISP-GigabitEthernet0/0]ip address 202.1.100.1 30

[ISP-GigabitEthernet0/0]quit

[ISP]int gi 0/1

[ISP-GigabitEthernet0/1]des <connect to R2>

[ISP-GigabitEthernet0/1]ip address 202.2.100.1 30

[ISP-GigabitEthernet0/1]quit

R2：

<H3C>sys

System View: return to User View with Ctrl+Z.

[H3C]sysname R2

[R2]vlan 100

[R2-vlan100]quit

[R2]int vlan 100

[R2-Vlan-interface100]ip address 172.16.100.1 24

[R2-Vlan-interface100]quit

[R2]int gi 0/0

[R2-GigabitEthernet0/0]port link-mode bridge

[R2-GigabitEthernet0/0]port link-type access

[R2-GigabitEthernet0/0]port access vlan 100

[R2-GigabitEthernet0/0]quit

[R2]acl basic 2000

[R2-acl-ipv4-basic-2000]rule 0 permit source any

[R2-acl-ipv4-basic-2000]quit

[R2]int gi 0/1

[R2-GigabitEthernet0/1]des <connect to ISP>

[R2-GigabitEthernet0/1]ip address 202.2.100.2 30

[R2-GigabitEthernet0/1]nat outbound 2000

[R2-GigabitEthernet0/1]quit

[R2]ip route-static 0.0.0.0 0.0.0.0 202.2.100.1

第一阶段测试：

内网1终端进行宽带PPPOE拨号：

内网2终端填写IP地址：

内网1终端能PING通内网2的外网地址，PING不同内网2的私网地址：

内网2终端能PING通内网1的外网地址，PING不同内网1的私网地址：

2、第二阶段配置

L2TP VPN LNS关键配置点：

[R2]local-user weijianing class network

New local user added.

[R2-luser-network-weijianing]password simple weijianing

[R2-luser-network-weijianing]service-type ppp

[R2-luser-network-weijianing]quit

[R2]domain name system

[R2-isp-system]authentication ppp local

[R2-isp-system]quit

[R2]ip pool weijianing 172.16.200.2 172.16.200.254

[R2]ip pool weijianing gateway 172.16.200.1

[R2]int Virtual-Template 1

[R2-Virtual-Template1]ip address 172.16.200.1 255.255.255.0

[R2-Virtual-Template1]ppp authentication chap domain system

[R2-Virtual-Template1]remote address pool weijianing

[R2-Virtual-Template1]quit

[R2]l2tp enable

[R2]l2tp-group 1 mode lns

[R2-l2tp1]tunnel name LNS

[R2-l2tp1]undo tunnel authentication

[R2-l2tp1]allow l2tp virtual-template 1

[R2-l2tp1]quit

内网1的终端设置VPN拨号：

输入用户名、密码，点击连接：

VPN拨号连接成功：

内网1终端能PING内网2的终端：

内网2的终端也可以PING通内网1的终端：

由于内网1的终端拨号过来后，LNS为其分配了IP地址，因此内网2终端PING的是分配后的IP地址，根据内网1拨号后获取的IP地址为172.16.200.3，所以内网2的终端PING的是172.16.200.3

当前内网1的终端是经过了PPPOE宽带拨号后再进行L2TP VPN拨号来实现两次拨号来访问L2TP VPN的私网

至此，L2TP典型组网配置3已完成！