Hi,
My HFC connection started having short period of dropouts 20+ times a day for about a month or so. I use ASUS RT-AC68U for my router, and the modem is one provided by TPG.
Here I grab logs for a day. As you can see, each dropout lasts only for few seconds to up to a minute.
Jun 13 03:25:27 WAN Connection: Fail to connect with some issues.
Jun 13 03:25:28 WAN Connection: WAN was restored.
Jun 13 11:29:29 WAN Connection: Fail to connect with some issues.
Jun 13 11:29:40 WAN Connection: WAN was restored.
Jun 13 11:53:43 WAN Connection: Fail to connect with some issues.
Jun 13 11:53:45 WAN Connection: WAN was restored.
Jun 13 11:54:08 WAN Connection: Fail to connect with some issues.
Jun 13 11:54:22 WAN Connection: WAN was restored.
Jun 13 11:54:30 WAN Connection: Fail to connect with some issues.
Jun 13 11:55:05 WAN Connection: WAN was restored.
Jun 13 11:55:23 WAN Connection: Fail to connect with some issues.
Jun 13 11:56:34 WAN Connection: WAN was restored.
Jun 13 12:00:13 WAN Connection: Fail to connect with some issues.
Jun 13 12:00:27 WAN Connection: WAN was restored.
Jun 13 16:00:05 WAN Connection: Fail to connect with some issues.
Jun 13 16:02:02 WAN Connection: WAN was restored.
Jun 13 18:05:39 WAN Connection: Fail to connect with some issues.
Jun 13 18:05:52 WAN Connection: WAN was restored.
Jun 13 18:06:05 WAN Connection: Fail to connect with some issues.
Jun 13 18:06:36 WAN Connection: WAN was restored.
Jun 13 18:06:43 WAN Connection: Fail to connect with some issues.
Jun 13 18:07:01 WAN Connection: WAN was restored.
Jun 13 18:07:09 WAN Connection: Fail to connect with some issues.
Jun 13 18:07:14 WAN Connection: WAN was restored.
Jun 13 18:07:33 WAN Connection: Fail to connect with some issues.
Jun 13 18:07:42 WAN Connection: WAN was restored.
Jun 13 18:07:50 WAN Connection: Fail to connect with some issues.
Jun 13 18:08:02 WAN Connection: WAN was restored.
Jun 13 19:12:53 WAN Connection: Fail to connect with some issues.
Jun 13 19:12:55 WAN Connection: WAN was restored.
Jun 13 19:58:50 WAN Connection: Fail to connect with some issues.
Jun 13 19:59:17 WAN Connection: WAN was restored.
Jun 13 19:59:25 WAN Connection: Fail to connect with some issues.
Jun 13 19:59:48 WAN Connection: WAN was restored.
Jun 13 20:00:10 WAN Connection: Fail to connect with some issues.
Jun 13 20:00:25 WAN Connection: WAN was restored.
Jun 13 20:00:38 WAN Connection: Fail to connect with some issues.
Jun 13 20:00:40 WAN Connection: WAN was restored.
Jun 13 20:00:54 WAN Connection: Fail to connect with some issues.
Jun 13 20:01:16 WAN Connection: WAN was restored.
Jun 13 20:22:47 WAN Connection: Fail to connect with some issues.
Jun 13 20:22:48 WAN Connection: WAN was restored.
Jun 13 20:23:02 WAN Connection: Fail to connect with some issues.
Jun 13 20:23:14 WAN Connection: WAN was restored.
Jun 13 20:23:22 WAN Connection: Fail to connect with some issues.
Jun 13 20:24:34 WAN Connection: WAN was restored.
Jun 13 20:38:20 WAN Connection: Fail to connect with some issues.
Jun 13 20:38:24 WAN Connection: WAN was restored.
Jun 13 20:38:38 WAN Connection: Fail to connect with some issues.
Jun 13 20:38:55 WAN Connection: WAN was restored.
Jun 13 20:39:04 WAN Connection: Fail to connect with some issues.
Jun 13 20:39:06 WAN Connection: WAN was restored.
Jun 13 21:11:03 WAN Connection: Fail to connect with some issues.
Jun 13 21:11:04 WAN Connection: WAN was restored.
Jun 13 21:46:40 WAN Connection: Fail to connect with some issues.
Jun 13 21:46:52 WAN Connection: WAN was restored.
Jun 13 21:47:06 WAN Connection: Fail to connect with some issues.
Jun 13 21:47:11 WAN Connection: WAN was restored.
Jun 13 21:47:19 WAN Connection: Fail to connect with some issues.
Jun 13 21:47:27 WAN Connection: WAN was restored.
Jun 13 21:47:35 WAN Connection: Fail to connect with some issues.
Jun 13 21:47:47 WAN Connection: WAN was restored.
Jun 13 22:35:35 WAN Connection: Fail to connect with some issues.
Jun 13 22:35:38 WAN Connection: WAN was restored.
Jun 13 22:35:49 WAN Connection: Fail to connect with some issues.
Jun 13 22:35:56 WAN Connection: WAN was restored.
Jun 13 22:36:10 WAN Connection: Fail to connect with some issues.
Jun 13 22:36:10 WAN Connection: WAN was restored.
Jun 13 22:36:24 WAN Connection: Fail to connect with some issues.
Jun 13 22:36:28 WAN Connection: WAN was restored.
Jun 13 22:36:47 WAN Connection: Fail to connect with some issues.
Jun 13 22:37:00 WAN Connection: WAN was restored.
Jun 13 22:37:14 WAN Connection: Fail to connect with some issues.
Jun 13 22:37:20 WAN Connection: WAN was restored.
Jun 13 22:38:03 WAN Connection: Fail to connect with some issues.
Jun 13 22:38:11 WAN Connection: WAN was restored.
Jun 13 22:38:19 WAN Connection: Fail to connect with some issues.
Jun 13 22:38:20 WAN Connection: WAN was restored.
Jun 13 22:38:28 WAN Connection: Fail to connect with some issues.
Jun 13 22:38:31 WAN Connection: WAN was restored.
Jun 13 22:38:39 WAN Connection: Fail to connect with some issues.
Jun 13 22:38:42 WAN Connection: WAN was restored.
Jun 13 22:38:50 WAN Connection: Fail to connect with some issues.
Jun 13 22:38:51 WAN Connection: WAN was restored.
Jun 13 22:38:59 WAN Connection: Fail to connect with some issues.
Jun 13 22:39:11 WAN Connection: WAN was restored.
Jun 13 22:39:49 WAN Connection: Fail to connect with some issues.
Jun 13 22:39:51 WAN Connection: WAN was restored.
Jun 13 22:39:59 WAN Connection: Fail to connect with some issues.
Jun 13 22:40:01 WAN Connection: WAN was restored.
Jun 13 22:40:09 WAN Connection: Fail to connect with some issues.
Jun 13 22:40:12 WAN Connection: WAN was restored.
Jun 13 22:40:25 WAN Connection: Fail to connect with some issues.
Jun 13 22:40:27 WAN Connection: WAN was restored.
Jun 13 23:52:33 WAN Connection: Fail to connect with some issues.
Interestingly my router does not tell anything more than "Failed to connect with some issues", and those 'micro dropouts' seem not require re-establishing the connection but recovers by itself.
As a comparison, I also post logs from a 'connection down' event below. Hope you can see it's very different from what I posted above. But this type of event happens much less often (once or twice a month) and I'm okay with having those occasionally.
May 17 12:34:26 WAN Connection: Fail to connect with some issues.
May 17 12:34:30 WAN Connection: WAN(0) link down.
May 17 12:34:35 WAN Connection: WAN(0) link up.
May 17 12:34:35 rc_service: wanduck 179:notify_rc restart_wan_if 0
May 17 12:34:40 pppd[21809]: Connected to xx:xx:xx:xx:xx:xx via interface vlan2
May 17 12:34:40 WAN Connection: Fail to connect with some issues.
May 17 12:34:42 wan: finish adding multi routes
May 17 12:34:50 WAN Connection: WAN(0) link down.
May 17 12:35:01 zcip client: configured xxx.xxx.xxx.xxx
May 17 12:35:05 WAN Connection: WAN(0) link up.
May 17 12:35:05 rc_service: wanduck 179:notify_rc restart_wan_if 0
May 17 12:35:09 pppd[22033]: Connected to xx:xx:xx:xx:xx:xx via interface vlan2
May 17 12:35:10 WAN Connection: Fail to connect with some issues.
May 17 12:35:11 wan: finish adding multi routes
May 17 12:35:21 WAN Connection: WAN(0) link down.
May 17 12:35:31 zcip client: configured xxx.xxx.xxx.xxx
May 17 12:35:40 WAN Connection: WAN(0) link up.
May 17 12:35:40 rc_service: wanduck 179:notify_rc restart_wan_if 0
May 17 12:35:44 pppd[22282]: Connected to xx:xx:xx:xx:xx:xx via interface vlan2
May 17 12:35:46 WAN Connection: Fail to connect with some issues.
May 17 12:35:46 wan: finish adding multi routes
May 17 12:35:51 WAN Connection: WAN was restored.
May 17 12:36:05 zcip client: configured xxx.xxx.xxx.xxx
Does anyone have any idea about the 'micro dropouts'? I feel the physical connection has some problem but I'm not 100% sure.
