求助-外网PPPOE掉线后有时候就拨不上了

小明

WAN口接入方式是PPPOE，有时候掉线后就拨不上了，但不是每次都这样。出现这个情况后，把WAN口的线拔了重插或重启路由器就可以恢复正常。
拨号日志：
从1月3日的23:14拨上之后，一直到了6日的5:45掉线，之后就一直是Timeout waiting for PADO packets 和Unable to complete PPPoE Discovery，
一直到10点25重插了WAN口的线之后就拨上了。

2020-01-06 10:25:46	wan1	remote LL address fe80::4ad5:39ff:fe4d:7880
2020-01-06 10:25:46	wan1	local LL address fe80::d169:5436:5598:f2ff
2020-01-06 10:25:46	wan1	peer from calling number 485:39:4D:78:80 authorized
2020-01-06 10:25:46	wan1	PAP authentication succeeded
2020-01-06 10:25:46	wan1	Remote message: SUCCESS
2020-01-06 10:25:46	wan1	syncppp not active
2020-01-06 10:25:43	wan1	wan1" class="" style="box-sizing: border-box; padding: 10px 6px; transition: all 0.4s ease 0s; border-bottom-color: rgb(221, 221, 221);">Connect: wan1_ad <--> wan1
2020-01-06 10:25:43	wan1	Using interface wan1_ad
2020-01-06 10:25:43	wan1	Connected to 48:d5:39:4d:78:80 via interface wan1
2020-01-06 10:25:43	wan1	PPP session is 16772
2020-01-06 10:25:38	wan1	Unable to complete PPPoE Discovery
2020-01-06 10:25:38	wan1	Timeout waiting for PADO packets
2020-01-06 10:25:18	wan1	Unable to complete PPPoE Discovery
2020-01-06 10:25:18	wan1	Timeout waiting for PADO packets
2020-01-06 10:24:58	wan1	Unable to complete PPPoE Discovery
2020-01-06 10:24:58	wan1	Timeout waiting for PADO packets
2020-01-06 10:24:38	wan1	Unable to complete PPPoE Discovery
2020-01-06 10:24:38	wan1	Timeout waiting for PADO packets
2020-01-06 10:24:23	wan1	pppd 2.4.7 started by root, uid 0
2020-01-06 10:24:01	wan1	Unable to complete PPPoE Discovery
2020-01-06 10:24:01	wan1	Timeout waiting for PADO packets
2020-01-06 10:23:40	wan1	Unable to complete PPPoE Discovery
2020-01-06 10:23:40	wan1	Timeout waiting for PADO packets
2020-01-06 10:23:20	wan1	Unable to complete PPPoE Discovery
2020-01-06 10:23:20	wan1	Timeout waiting for PADO packets

2020-01-06 5:46:41	wan1	Unable to complete PPPoE Discovery
2020-01-06 5:46:41	wan1	Timeout waiting for PADO packets
2020-01-06 5:46:21	wan1	Unable to complete PPPoE Discovery
2020-01-06 5:46:21	wan1	Timeout waiting for PADO packets
2020-01-06 5:46:01	wan1	Unable to complete PPPoE Discovery
2020-01-06 5:46:01	wan1	Timeout waiting for PADO packets
2020-01-06 5:45:41	wan1	Unable to complete PPPoE Discovery
2020-01-06 5:45:41	wan1	Timeout waiting for PADO packets
2020-01-06 5:45:21	wan1	Modem hangup
2020-01-06 5:45:21	wan1	Sent PADT
2020-01-06 5:45:21	wan1	Connect time 3270.4 minutes.
2020-01-06 5:45:21	wan1	Connection terminated.
2020-01-06 5:45:15	wan1	Connect time 3270.4 minutes.
2020-01-06 5:45:15	wan1	Serial link appears to be disconnected.
2020-01-06 5:45:15	wan1	No response to 20 echo-requests
2020-01-03 23:14:51	wan1	secondary DNS address 202.99.166.4
2020-01-03 23:14:51	wan1	primary DNS address 202.99.160.68

小明

近期网络非常卡，今天线路测速发现上行只有0.5Mbps，折腾了半天也没解决，最后迫不得已降回了3.2.9版本（后来还是有问题）。掉线后拨不上的问题在以前的版本中也存在
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折腾了一天，解绑了爱快云，恢复出厂，重新绑定，上行速率的问题好像是解决了。