用ROS配置PPPOE服务器，连接 PPPOE服务器监听数据包如下：
07:50:52.398419 PPPoE PADI [Service-Name] [Host-Uniq 0x12150000]
07:50:52.398461 PPPoE PADO [Host-Uniq 0x12150000] [Service-Name] [AC-Name "MikroTik"] [Service-Name "pppoe"]
07:50:52.400079 PPPoE PADR [Service-Name] [Host-Uniq 0x12150000]
07:50:52.400120 PPPoE PADS [ses 0x12] [Host-Uniq 0x12150000] [Service-Name]
07:50:52.402604 PPPoE [ses 0x12] LCP, Conf-Request (0x01), id 1, length 16
07:50:52.402611 PPPoE [ses 0x12] LCP, Conf-Request (0x01), id 1, length 21
07:50:52.402611 PPPoE [ses 0x12] LCP, Conf-Ack (0x02), id 1, length 16
07:50:52.403494 PPPoE [ses 0x12] LCP, Conf-Ack (0x02), id 1, length 21
07:50:52.403502 PPPoE [ses 0x12] CHAP, Challenge (0x01), id 1, Value 3cca193423b93a6e8b13609aa4209bf1, Name MikroTik
07:50:52.406462 PPPoE [ses 0x12] LCP, Echo-Request (0x09), id 0, length 10
07:50:52.406467 PPPoE [ses 0x12] LCP, Echo-Reply (0x0a), id 0, length 10
07:50:52.408030 PPPoE [ses 0x12] CHAP, Response (0x02), id 1, Value 8fbdbac8f438f0c540fc21f801d0e6fe, Name user
07:50:52.408050 PPPoE [ses 0x12] CHAP, Success (0x03), id 1, Msg Welcome.PPPOE连接验证流程如下：
#https://www.haiyun.me
客户端开始连接发送广播包PADI寻找PPPOE服务器
PPPOE服务器接受到PADI广播包后，回复PADO注明主机名、服务类型。
客户端选择PPPOE服务器。
PPPOE服务器收到客户端发送的PADR消息后，给客户端分配会话ID并进行会话确认。
PPPOE服务器主动向客户端主动发起连接，发送一些随机字符串、id和PPPOE服务器的主机名作为连接信息。
客户端根据PPPOE服务器连接信息中字符串、id、主机名、账号密码计算出md5值发送给PPPOE服务器，同时明文发送账号。
PPPOE服务器确认验证信息是否正确，若正确定进行网络配置阶段，错误则断开链路。标签：pppoe, ros, adsl, pppoe连接验证详细流程