拓扑图如下图所示：
配置如下所示：
PPPOE server配置
[PPPOE SERVER]local-user 123 class network //配置账户和密码
[PPPOE SERVER-luser-network-jiance]password simple 123
[PPPOE SERVER-luser-network-jiance]service-type ppp
[PPPOE SERVER]domain system //配置域
[PPPOE SERVER-isp-system]authentication ppp local
[PPPOE SERVER]ip pool 1 20.1.1.2 20.1.1.10 //分配给客户端的地址池
[PPPOE SERVER]interface Virtual-Template 1
[PPPOE SERVER-Virtual-Template1]ppp authentication-mode chap domain system //配置验证方式
[PPPOE SERVER-Virtual-Template1]ip address 20.1.1.1 24
[PPPOE SERVER-Virtual-Template1]remote address pool 1
[PPPOE SERVER]interface GigabitEthernet 0/0
[PPPOE SERVER-GigabitEthernet0/0]pppoe-server bind virtual-template 1 //关联物理接口
PPPOE client的配置：
[pppoe client]dialer-group 1 rule ip permit //创建拨号规则
[pppoe client]interface Dialer 1 //创建虚拟拨号接口
[pppoe client-Dialer1]dialer bundle enable
[pppoe client-Dialer1]dialer-group 1
[pppoe client-Dialer1]ppp chap user 123
[pppoe client-Dialer1]ppp chap password simple 123
[pppoe client-Dialer1]ip address ppp-negotiate
[pppoe client]interface GigabitEthernet 0/0 //拨号口关联物理接口
[pppoe client-GigabitEthernet0/0]pppoe-client dial-bundle-number 1
[pppoe client]ip route-static 0.0.0.0 0 Dialer 1 //V7设备需要通过IP流触发拨号才行，而V5设备只要配置成功PPPOE就会发起拨号连接，所以V7设备成功配置拨号之后需要ping。
Ping 8.8.8.8 (8.8.8.8): 56 data bytes, press CTRL_C to break
%Oct 6 13:38:14:243 2017 pppoe client IFNET/3/PHY_UPDOWN: Physical state on the interface Virtual-Access0 changed to up.
Request time out
--- Ping statistics for 8.8.8.8 ---
[pppoe client-Dialer1]dialer timer idle 0 //如果希望自动触发拨号，可以采用配置PPPOE的永久在线模式来实现。
