LAN 拨号，PPPOE会话总是重建，见日志。

zhx200808

刷了固件后，启用lan拨号，总是掉线，设备日志现实PPPOE会话在不停重建
Jan  1 00:12:57 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:02 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:07 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:12 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:17 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:21 (none) daemon.crit syslog: Clear IP addresses.  PPP connection DOWN.
Jan  1 00:13:22 (none) daemon.crit syslog: Clear IP addresses.  Connection DOWN.
Jan  1 00:13:23 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:26 (none) daemon.notice syslog: PPP: Start to connect ...
Jan  1 00:13:26 (none) daemon.crit syslog: PPP server detected.
Jan  1 00:13:26 (none) daemon.crit syslog: PPP session established.
Jan  1 00:13:26 (none) daemon.crit syslog: PPP LCP UP.
Jan  1 00:13:27 (none) daemon.crit syslog: Received valid IP address from server.  Connection UP.
Jan  1 00:13:30 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:32 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:37 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:42 (none) daemon.debug syslog: ATCPOLL: No Data
Jan  1 00:13:47 (none) daemon.debug syslog: ATCPOLL: No Data
大神给诊断下
这个ATCPOLL是个啥玩意儿