Router#sho run

Building configuration...

Current configuration : 1822 bytes

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version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

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hostname Router

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boot-start-marker

boot-end-marker

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logging message-counter syslog

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no aaa new-model

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dot11 syslog

ip source-route

ip cef

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no ip domain lookup

no ipv6 cef

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multilink bundle-name authenticated

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vpdn enable  //激活VPDN

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vpdn-group pppoe  //创建VPDN组，命名为pppoe

 request-dialin  

  protocol pppoe  //协议选择PPPoE

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voice-card 0

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archive

 log config

  hidekeys

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interface GigabitEthernet0/0

 no ip address

 duplex auto

 speed auto

 media-type rj45

 pppoe enable group global  //在接ADSL猫的接口下激活pppoe

 pppoe-client dial-pool-number 1  //将接口加入到拨号池1

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interface GigabitEthernet0/1

 ip address 192.168.0.1 255.255.255.252

 ip nat inside  //接内网核心交换机的接口，作为NAT的源接口

 ip virtual-reassembly

 duplex auto

 speed auto

 media-type rj45

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interface Dialer1  //创建拨号口

 ip address negotiated  //IP地址协商

 ip mtu 1492  //MTU指定为1492

 ip nat outside  //这里需要特别注意，有的同学可能会把NAT的出口配置在连接ADSL猫的物理接口下，那是行不通的~

 ip virtual-reassembly

 encapsulation ppp  //封装PPP

 dialer pool 1  

 dialer idle-timeout 0

 dialer-group 1

 ppp authentication chap callin  //PPP的认证方式chap，这里的callin要尤其注意，callin不加的话会报错，我就在这里卡了2个小时才搞明白。。。

 ppp chap hostname XXXXXXXXXXX //ADSL帐户的用户名

 ppp chap password 0 XXXXXXXX  //ADSL帐户的密码

 ppp pap sent-username 02584550430 password 0 84550430  //其实PAP的这个我觉得可以不写。。。

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ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 Dialer1  //一条默认路由，出口指向拨号口1

ip route 192.168.2.0 255.255.255.0 GigabitEthernet0/1

ip route 192.168.3.0 255.255.255.0 GigabitEthernet0/1

ip route 192.168.4.0 255.255.255.0 GigabitEthernet0/1

ip route 192.168.5.0 255.255.255.0 GigabitEthernet0/1

ip route 192.168.6.0 255.255.255.0 GigabitEthernet0/1

no ip http server

no ip http secure-server

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ip nat inside source list 1 interface Dialer1 overload  //NAT配置，注意复用参数~

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access-list 1 permit 192.168.0.0 0.0.255.255

dialer-list 1 protocol ip permit

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control-plane

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line con 0

 exec-timeout 0 0

 logging synchronous

line aux 0

line vty 0 4

 login

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scheduler allocate 20000 1000

end