将物理接口与虚拟模板接口关联

[RTA] interface virtual-template 1
[RTA-Virtual-Template1] ip address 1.1.1.1 24
[RTA] interface serial 2/0
[RTA-Serial2/0] ppp mp virtual-template 1
[RTA] interface serial 2/1
[RTA-Serial2/0] ppp mp virtual-template 1

[RTB] interface virtual-template 1
[RTB-Virtual-Template1] ip address 1.1.1.2 24
[RTB] interface serial 2/0
[RTB-Serial2/0] ppp mp virtual-template 1
[RTB] interface serial 2/1
[RTB-Serial2/0] ppp mp virtual-template 1
MP-Group方式配置（拓扑图同上）
RTA] interface mp-group 1
[RTA-Mp-group1] ip address 1.1.1.1 24
[RTA-Mp-group1] interface Serial2/0
[RTA-Serial2/0] ppp mp mp-group 1
[RTA-Mp-group1] interface Serial2/1
[RTA-Serial2/1] ppp mp mp-group 1

[RTB] interface mp-group 1
[RTB-Mp-group1] ip address 1.1.1.2 24
[RTB-Mp-group1] interface Serial2/0
[RTB-Serial2/0] ppp mp mp-group 1
[RTB-Mp-group1] interface Serial2/1
[RTB-Serial2/1] ppp mp mp-group 1

参考资料：H3CNE6.0 PPT  X00070003 第30章 配置PPP