SR6616+端口聚合

pos口没有二三层聚合的概念，PPP协议的话应该用的是MP捆绑

举例：

# 创建MP-group接口，配置相应的IP地址。

<RouterA> system-view

[RouterA] interface mp-group 2/0/0

[RouterA-MP-group2/0/0] ip address 1.1.1.1 24

# 配置串口Serial2/1/1。

[RouterA-MP-group2/0/0] quit

[RouterA] interface serial 2/1/1

[RouterA-Serial2/1/1] link-protocol ppp

[RouterA-Serial2/1/1] ppp mp mp-group 2/0/0

[RouterA-Serial2/1/1] shutdown

[RouterA-Serial2/1/1] undo shutdown

[RouterA-Serial2/1/1] quit

# 配置串口Serial2/1/0。

[RouterA] interface serial 2/1/0

[RouterA-Serial2/1/0] link-protocol ppp

[RouterA-Serial2/1/0] ppp mp mp-group 2/0/0

[RouterA-Serial2/1/0] shutdown

[RouterA-Serial2/1/0] undo shutdown

[RouterA-Serial2/1/0] quit