DVPN 和GRE组合应用典型配置

DVPN和GRE配合使用典型组网

 

 

一、 组网需求

    如下图所示，总部需要与分支A通过DVPN构建虚拟私有网络，与分支B通过GRE构建虚拟私有网络，这样总部与分支A及分支B共同构建一个大的VPN网络。在该网络中需要实现：

?        Server对接入DVPN的分支A进行身份认证；

?        分支A对需要接入的Server也进行身份认证。

 

二、 组网图

 

 

    

三、 配置步骤

1.     配置Server

配置Ethernet0/0/0接口

[Server] interface Ethernet0/0/0

[Server-Ethernet0/0/0] ip address 201.1.1.1 255.255.255.0

[Server-Ethernet0/0/0] quit

配置Ethernet0/0/1接口

[Server] interface Ethernet0/0/1

[Server-Ethernet0/0/1] ip address 10.0.1.1 255.255.255.0

[Server-Ethernet0/0/1] quit

配置Server的身份pre-shared-key。

[Server] dvpn server pre-shared-key 123456

配置DVPN policy

[Server] dvpn policy testpolicy

[Server-Policy-testpolicy] authentication-client method chap domain dvpn

[Server-Policy-testpolicy] data algorithm-suite 7

[Server-Policy-testpolicy] session algorithm-suite 12

[Server-Policy-testpolicy] quit

配置DVPN使用的验证域使用本地验证

[Server] domain dvpn

[Server-isp-domain] access-limit disable

[Server-isp-domain] state active

[Server-isp-domain] quit

配置DVPN本地用户

[Server] local-user dvpnuser

[Server-luser-dvpnuser] password simple dvpnuser

[Server-luser-dvpnuser] service-type dvpn

[Server-luser-dvpnuser] quit

配置DVPN使用的Tunnel0接口

[Server] interface tunnel 0

[Server-Tunnel0] tunnel-protocol udp dvpn

[Server-Tunnel0] dvpn interface-type server

[Server-Tunnel0] ip address 10.0.0.1 255.255.255.0

[Server-Tunnel0] source Ethernet0/0/0

[Server-Tunnel0] dvpn dvpn-id 1

[Server-Tunnel0] dvpn policy testpolicy

[Server-Tunnel0] quit

配置GRE使用的Tunnel1接口

[Server] interface tunnel 1

[Server-Tunnel1] ip address 10.1.0.1 255.255.255.0

[Server-Tunnel1] destination 211.1.1.3

[Server-Tunnel1] source Ethernet0/0/0

[Server-Tunnel1] quit

配置路由信息

[Server] ip route-static 0.0.0.0 255.255.255.0 201.1.1.2

[Server] ip route-static 10.1.2.0 255.255.255.0 tunnel1

[Server] ip route-static 10.0.2.0 255.255.255.0 10.0.0.2

 

2.     配置分支A

配置Ethernet0/0/0接口通过DHCP获取地址

[Client1] interface Ethernet0/0/0

[Client1-Ethernet0/0/0] ip address 201.1.2.1 255.255.255.0

[Client1-Ethernet0/0/0] quit

配置Ethernet0/0/1接口

[Client1] interface Ethernet0/0/1

[Client1-Ethernet0/0/1] ip address 10.0.2.1 255.255.255.0

[Client1-Ethernet0/0/1] quit

配置dvpn-class

[Client2] dvpn class testserver

[Client1-class-testserver] public-ip 201.1.1.1

[Client1-class-testserver] authentication-server method pre-share

[Client1-class-testserver] pre-shared-key 123456

[Client1-class-testserver] local-user dvpnuser password simple dvpnuser

[Client1-class-testserver] quit

配置Tunnel0接口属性

[Client1] interface tunnel 0

[Client1-Tunnel0] ip address 10.0.0.2 255.255.255.0

[Client1-Tunnel0] tunnel-protocol udp dvpn

[Client1-Tunnel0] source Ethernet0/0/0

[Client1-Tunnel0] dvpn interface-type client

[Client1-Tunnel0] dvpn server testserver

[Client1-Tunnel0] dvpn vpn-id 1

[Client1-Tunnel0] quit    

配置静态路由

[Client1] ip route-static 0.0.0.0 255.255.255.0 201.1.2.2

[Client1] ip route-static 10.0.1.0 255.255.255.0 10.0.0.1

[Client1] ip route-static 10.1.2.0 255.255.255.0 10.0.0.1  

 

3.     配置分支B

配置Ethernet0/0/0接口

[Client2] interface Ethernet0/0/0

[Client2-Ethernet0/0/0] ip address 201.1.3.1 255.255.255.0

[Client2-Ethernet0/0/0] quit

配置Ethernet0/0/1接口

[Client2] interface Ethernet0/0/1

[Client2-Ethernet0/0/1] ip address 10.1.2.1 255.255.255.0

[Client2-Ethernet0/0/1] quit

配置Tunnel0接口属性

[Client2] interface tunnel 0

[Client2-Tunnel0] ip address 10.1.0.2 255.255.255.0

[Client2-Tunnel0] source Ethernet0/0/0

[Client2-Tunnel0] destination 201.1.1.1

[Client2-Tunnel0] quit

配置静态路由

[Client2] ip route-static 0.0.0.0 255.255.255.0 201.1.3.2

[Client2] ip route-static 10.0.1.0 255.255.255.0 10.0.0.1

[Client2] ip route-static 10.0.2.0 255.255.255.0 10.0.0.2

 

四、 配置关键点

1、只需要在Server端配置Policy，DVPN建立成功后，会下发给分支；

2、DVPN支持加密，GRE不支持加密；

3、  GRE两端配置需要固定IP，DVPN支持NAT穿越。