RT-AC87U has started randomly dropping and reconnecting in the past day

[dougiejones]

As the title says, my router has curiously developed this problem. Thought it was the ISP so I called them up, but they swear it's the router or modem. No idea why it might be doing this.

Some other info:
-Connection is wired
-Never had any issues like this before now
-Most of the time when this happens, the bars on the router all show blue and the router hub/menu shows it as connected
-One of two router/modem setups in the house. The other one has been working fine and has zero problems

Here's a log, if it does any good:

Apr 18 20:47:42 rc_service: ip-up 1930:notify_rc start_firewall
Apr 18 20:47:43 miniupnpd[2002]: shutting down MiniUPnPd
Apr 18 20:47:43 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 18 20:47:43 miniupnpd[2063]: version 1.9 started
Apr 18 20:47:43 miniupnpd[2063]: HTTP listening on port 46725
Apr 18 20:47:43 miniupnpd[2063]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:00:34 disk_monitor: Got SIGALRM...
Apr 18 21:27:47 rc_service: httpd 276:notify_rc start_autodet
Apr 18 21:27:50 rc_service: httpd 276:notify_rc restart_wan_if 0
Apr 18 21:27:51 rc_service: httpd 276:notify_rc start_webs_update
Apr 18 21:27:51 rc_service: waitting "restart_wan_if 0" via httpd ...
Apr 18 21:27:52 kernel: Attempt to kill tasklet from interrupt
Apr 18 21:27:54 wan: [wan0_hwaddr] == [AC:9E:17:49:63:90]
Apr 18 21:27:54 wan: [deconfig] udhcpc done[286]
Apr 18 21:27:55 pppd[2630]: pppd 2.4.7 started by admin, uid 0
Apr 18 21:27:55 pppd[2630]: Connected to 00:00:5e:00:01:51 via interface eth0
Apr 18 21:27:55 pppd[2630]: Connect: ppp0 <--> eth0
Apr 18 21:27:58 pppd[2630]: PAP authentication failed
Apr 18 21:27:59 pppd[2630]: Connection terminated.
Apr 18 21:28:07 WAN Connection: Failed to authenticate ourselves to peer.
Apr 18 21:28:08 DualWAN: skip single wan wan_led_control - WANRED off
Apr 18 21:28:08 nat: apply redirect rules
Apr 18 21:28:08 rc_service: httpd 276:notify_rc restart_wan_if 0
Apr 18 21:28:09 kernel: Attempt to kill tasklet from interrupt
Apr 18 21:28:11 wan: [wan0_hwaddr] == [AC:9E:17:49:63:90]
Apr 18 21:28:11 pppd[2751]: pppd 2.4.7 started by admin, uid 0
Apr 18 21:28:11 pppd[2751]: Connected to 00:00:5e:00:01:51 via interface eth0
Apr 18 21:28:11 pppd[2751]: Connect: ppp0 <--> eth0
Apr 18 21:28:11 wan: [deconfig] udhcpc done[286]
Apr 18 21:28:14 pppd[2751]: PAP authentication succeeded
Apr 18 21:28:14 pppd[2751]: peer from calling number 00:00:5E:00:01:51 authorized
Apr 18 21:28:14 pppd[2751]: local IP address 173.185.76.237
Apr 18 21:28:14 pppd[2751]: remote IP address 98.20.104.1
Apr 18 21:28:14 pppd[2751]: primary DNS address 166.102.165.13
Apr 18 21:28:14 pppd[2751]: secondary DNS address 207.91.5.20
Apr 18 21:28:14 rc_service: ip-up 2756:notify_rc start_firewall
Apr 18 21:28:15 miniupnpd[2063]: shutting down MiniUPnPd
Apr 18 21:28:15 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 18 21:28:15 wan: finish adding multi routes
Apr 18 21:28:15 rc_service: ip-up 2756:notify_rc stop_upnp
Apr 18 21:28:15 rc_service: waitting "start_firewall" via ip-up ...
Apr 18 21:28:15 miniupnpd[2790]: version 1.9 started
Apr 18 21:28:15 miniupnpd[2790]: HTTP listening on port 50346
Apr 18 21:28:15 miniupnpd[2790]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:28:16 rc_service: ip-up 2756:notify_rc start_upnp
Apr 18 21:28:16 rc_service: waitting "stop_upnp" via ip-up ...
Apr 18 21:28:16 miniupnpd[2790]: shutting down MiniUPnPd
Apr 18 21:28:17 miniupnpd[2792]: version 1.9 started
Apr 18 21:28:17 miniupnpd[2792]: HTTP listening on port 37069
Apr 18 21:28:17 miniupnpd[2792]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:28:18 rc_service: httpd 276:notify_rc start_autodet
Apr 18 21:28:30 WAN Connection: WAN was restored.
Apr 18 21:28:31 rc_service: httpd 276:notify_rc restart_wan_if 0
Apr 18 21:28:32 rc_service: httpd 276:notify_rc start_webs_update
Apr 18 21:28:32 rc_service: waitting "restart_wan_if 0" via httpd ...
Apr 18 21:28:32 rc_service: zcip 2816:notify_rc start_firewall
Apr 18 21:28:32 rc_service: waitting "restart_wan_if 0" via httpd ...
Apr 18 21:28:33 kernel: Attempt to kill tasklet from interrupt
Apr 18 21:28:35 wan: [wan0_hwaddr] == [AC:9E:17:49:63:90]
Apr 18 21:28:35 wan: [deconfig] udhcpc done[286]
Apr 18 21:28:35 pppd[2858]: pppd 2.4.7 started by admin, uid 0
Apr 18 21:28:36 zcip client: configured 0.0.0.0
Apr 18 21:28:37 miniupnpd[2792]: shutting down MiniUPnPd
Apr 18 21:28:37 nat: apply nat rules (/tmp/nat_rules__eth0)
Apr 18 21:28:38 miniupnpd[2911]: version 1.9 started
Apr 18 21:28:38 miniupnpd[2911]: add_filter_rule() : chain FUPNP not found
Apr 18 21:28:38 miniupnpd[2911]: Failed to redirect 9308 -> 192.168.1.214:9308 protocol UDP
Apr 18 21:28:38 miniupnpd[2911]: HTTP listening on port 39881
Apr 18 21:28:38 miniupnpd[2911]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:28:39 rc_service: ip-up 2756:notify_rc start_firewall
Apr 18 21:28:40 miniupnpd[2911]: shutting down MiniUPnPd
Apr 18 21:28:40 nat: apply nat rules (/tmp/nat_rules__eth0)
Apr 18 21:28:41 miniupnpd[2982]: version 1.9 started
Apr 18 21:28:41 miniupnpd[2982]: add_filter_rule() : chain FUPNP not found
Apr 18 21:28:41 miniupnpd[2982]: Failed to redirect 9308 -> 192.168.1.214:9308 protocol UDP
Apr 18 21:28:41 miniupnpd[2982]: HTTP listening on port 56926
Apr 18 21:28:41 miniupnpd[2982]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:28:50 WAN Connection: Fail to connect with some issues.
Apr 18 21:28:50 DualWAN: skip single wan wan_led_control - WANRED off
Apr 18 21:28:50 nat: apply redirect rules
Apr 18 21:28:56 rc_service: zcip 3029:notify_rc start_firewall
Apr 18 21:28:56 zcip client: configured 169.254.157.248
Apr 18 21:28:57 miniupnpd[2982]: shutting down MiniUPnPd
Apr 18 21:28:57 nat: apply nat rules (/tmp/nat_rules__eth0)
Apr 18 21:28:57 miniupnpd[3049]: version 1.9 started
Apr 18 21:28:57 miniupnpd[3049]: add_filter_rule() : chain FUPNP not found
Apr 18 21:28:57 miniupnpd[3049]: Failed to redirect 9308 -> 192.168.1.214:9308 protocol UDP
Apr 18 21:28:57 miniupnpd[3049]: HTTP listening on port 47484
Apr 18 21:28:57 miniupnpd[3049]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:29:00 nat: apply redirect rules
Apr 18 21:29:01 rc_service: httpd 276:notify_rc restart_wan_if 0
Apr 18 21:29:01 pppd[2858]: Unable to complete PPPoE Discovery
Apr 18 21:29:01 kernel: Attempt to kill tasklet from interrupt
Apr 18 21:29:03 wan: [wan0_hwaddr] == [AC:9E:17:49:63:90]
Apr 18 21:29:03 pppd[3083]: pppd 2.4.7 started by admin, uid 0
Apr 18 21:29:03 pppd[3083]: Connected to 00:00:5e:00:01:51 via interface eth0
Apr 18 21:29:04 pppd[3083]: Connect: ppp0 <--> eth0
Apr 18 21:29:06 pppd[3083]: PAP authentication succeeded
Apr 18 21:29:06 pppd[3083]: peer from calling number 00:00:5E:00:01:51 authorized
Apr 18 21:29:07 pppd[3083]: local IP address 67.140.122.250
Apr 18 21:29:07 pppd[3083]: remote IP address 98.20.104.1
Apr 18 21:29:07 pppd[3083]: primary DNS address 166.102.165.13
Apr 18 21:29:07 pppd[3083]: secondary DNS address 207.91.5.20
Apr 18 21:29:07 rc_service: ip-up 3097:notify_rc start_firewall
Apr 18 21:29:07 miniupnpd[3049]: shutting down MiniUPnPd
Apr 18 21:29:08 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 18 21:29:08 wan: finish adding multi routes
Apr 18 21:29:08 rc_service: ip-up 3097:notify_rc stop_upnp
Apr 18 21:29:08 rc_service: waitting "start_firewall" via ip-up ...
Apr 18 21:29:08 miniupnpd[3147]: version 1.9 started
Apr 18 21:29:08 miniupnpd[3147]: HTTP listening on port 60080
Apr 18 21:29:08 miniupnpd[3147]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:29:09 rc_service: ip-up 3097:notify_rc start_upnp
Apr 18 21:29:09 rc_service: waitting "stop_upnp" via ip-up ...
Apr 18 21:29:09 miniupnpd[3147]: shutting down MiniUPnPd
Apr 18 21:29:10 miniupnpd[3149]: version 1.9 started
Apr 18 21:29:10 miniupnpd[3149]: HTTP listening on port 37318
Apr 18 21:29:10 miniupnpd[3149]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:29:15 rc_service: zcip 3163:notify_rc start_firewall
Apr 18 21:29:15 zcip client: configured 169.254.157.248
Apr 18 21:29:16 miniupnpd[3149]: shutting down MiniUPnPd
Apr 18 21:29:16 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 18 21:29:17 miniupnpd[3181]: version 1.9 started
Apr 18 21:29:17 miniupnpd[3181]: HTTP listening on port 57910
Apr 18 21:29:17 miniupnpd[3181]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:29:20 WAN Connection: WAN was restored.
Apr 18 21:29:30 rc_service: ip-up 3097:notify_rc start_firewall
Apr 18 21:29:30 miniupnpd[3181]: shutting down MiniUPnPd
Apr 18 21:29:31 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 18 21:29:31 miniupnpd[3247]: version 1.9 started
Apr 18 21:29:31 miniupnpd[3247]: HTTP listening on port 57575
Apr 18 21:29:31 miniupnpd[3247]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 21:31:50 rc_service: httpd 276:notify_rc start_sig_check
Apr 18 21:31:52 rc_service: httpd 276:notify_rc start_webs_update
Apr 18 21:31:52 rc_service: waitting "start_sig_check" via httpd ...
Apr 18 21:32:07 rc_service: skip the event: start_webs_update.

 

[dougiejones]

And another:

Apr 18 22:05:26 rc_service: httpd 276:notify_rc restart_wan_if 0
Apr 18 22:05:26 WAN Connection: Fail to connect with some issues.
Apr 18 22:05:26 DualWAN: skip single wan wan_led_control - WANRED off
Apr 18 22:05:27 nat: apply redirect rules
Apr 18 22:05:28 kernel: Attempt to kill tasklet from interrupt
Apr 18 22:05:30 wan: [wan0_hwaddr] == [AC:9E:17:49:63:90]
Apr 18 22:05:30 pppd[4503]: pppd 2.4.7 started by admin, uid 0
Apr 18 22:05:30 pppd[4503]: Connected to 00:00:5e:00:01:51 via interface eth0
Apr 18 22:05:30 pppd[4503]: Connect: ppp0 <--> eth0
Apr 18 22:05:34 pppd[4503]: PAP authentication succeeded
Apr 18 22:05:34 pppd[4503]: peer from calling number 00:00:5E:00:01:51 authorized
Apr 18 22:05:34 pppd[4503]: local IP address 173.185.65.34
Apr 18 22:05:34 pppd[4503]: remote IP address 98.20.104.1
Apr 18 22:05:34 pppd[4503]: primary DNS address 166.102.165.13
Apr 18 22:05:34 pppd[4503]: secondary DNS address 207.91.5.20
Apr 18 22:05:34 rc_service: ip-up 4508:notify_rc start_firewall
Apr 18 22:05:34 miniupnpd[4207]: shutting down MiniUPnPd
Apr 18 22:05:35 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 18 22:05:35 wan: finish adding multi routes
Apr 18 22:05:35 rc_service: ip-up 4508:notify_rc stop_upnp
Apr 18 22:05:35 rc_service: waitting "start_firewall" via ip-up ...
Apr 18 22:05:35 miniupnpd[4542]: version 1.9 started
Apr 18 22:05:35 miniupnpd[4542]: HTTP listening on port 36433
Apr 18 22:05:35 miniupnpd[4542]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 22:05:36 rc_service: ip-up 4508:notify_rc start_upnp
Apr 18 22:05:36 rc_service: waitting "stop_upnp" via ip-up ...
Apr 18 22:05:36 miniupnpd[4542]: shutting down MiniUPnPd
Apr 18 22:05:37 miniupnpd[4544]: version 1.9 started
Apr 18 22:05:37 miniupnpd[4544]: HTTP listening on port 57492
Apr 18 22:05:37 miniupnpd[4544]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 22:05:41 rc_service: zcip 4558:notify_rc start_firewall
Apr 18 22:05:41 zcip client: configured 169.254.157.248
Apr 18 22:05:42 miniupnpd[4544]: shutting down MiniUPnPd
Apr 18 22:05:42 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 18 22:05:43 miniupnpd[4576]: version 1.9 started
Apr 18 22:05:43 miniupnpd[4576]: HTTP listening on port 60161
Apr 18 22:05:43 miniupnpd[4576]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 18 22:05:46 WAN Connection: WAN was restored.

 

[joegreat]

As the title says, my router has curiously developed this problem. Thought it was the ISP so I called them up, but they swear it's the router or modem. No idea why it might be doing this.

The first guess would be (as yours) that the ISP has problems - of course they swear not, but still this would be my bet!

In the meantime you can restart (with power down for some minutes) the modem and router - and then wait an see!
Either one of your devices is dying (unlikely) or your ISP has temporary issues which they do not recognize yet - had this in the past with my ISP.
The last resort could be a failing cable (between ISP, modem or router).

 

[dougiejones]

It seemed to fix itself, but here I am again, as it's started reoccurring.

It's happened twice today. Here's a log of the latest time:

Apr 27 07:18:18 pppd[15752]: Serial link appears to be disconnected.
Apr 27 07:18:19 WAN Connection: Fail to connect with some issues.
Apr 27 07:18:20 DualWAN: skip single wan wan_led_control - WANRED off
Apr 27 07:18:20 nat: apply redirect rules
Apr 27 07:18:24 pppd[15752]: Connection terminated.
Apr 27 07:18:24 pppd[15752]: Modem hangup
Apr 27 07:18:34 pppd[15752]: Connected to 00:00:5e:00:01:51 via interface eth0
Apr 27 07:18:34 pppd[15752]: Connect: ppp0 <--> eth0
Apr 27 07:18:38 pppd[15752]: PAP authentication succeeded
Apr 27 07:18:38 pppd[15752]: peer from calling number 00:00:5E:00:01:51 authorized
Apr 27 07:18:38 pppd[15752]: local IP address 98.20.8.81
Apr 27 07:18:38 pppd[15752]: remote IP address 98.20.104.1
Apr 27 07:18:38 pppd[15752]: primary DNS address 166.102.165.13
Apr 27 07:18:38 pppd[15752]: secondary DNS address 207.91.5.20
Apr 27 07:18:38 rc_service: ip-up 9468:notify_rc start_firewall
Apr 27 07:18:39 wan: finish adding multi routes
Apr 27 07:18:39 rc_service: ip-up 9468:notify_rc stop_upnp
Apr 27 07:18:39 rc_service: waitting "start_firewall" via ip-up ...
Apr 27 07:18:39 miniupnpd[7808]: shutting down MiniUPnPd
Apr 27 07:18:40 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 27 07:18:40 miniupnpd[9502]: version 1.9 started
Apr 27 07:18:40 rc_service: ip-up 9468:notify_rc start_upnp
Apr 27 07:18:40 rc_service: waitting "stop_upnp" via ip-up ...
Apr 27 07:18:41 miniupnpd[9502]: HTTP listening on port 35997
Apr 27 07:18:41 miniupnpd[9502]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 27 07:18:41 miniupnpd[9502]: shutting down MiniUPnPd
Apr 27 07:18:42 miniupnpd[9504]: version 1.9 started
Apr 27 07:18:42 WAN Connection: WAN was restored.
Apr 27 07:18:42 miniupnpd[9504]: HTTP listening on port 55715
Apr 27 07:18:42 miniupnpd[9504]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 27 07:19:01 rc_service: ip-up 9468:notify_rc start_firewall
Apr 27 07:19:01 miniupnpd[9504]: shutting down MiniUPnPd
Apr 27 07:19:01 nat: apply nat rules (/tmp/nat_rules_ppp0_eth0)
Apr 27 07:19:02 miniupnpd[9588]: version 1.9 started
Apr 27 07:19:02 miniupnpd[9588]: HTTP listening on port 59521
Apr 27 07:19:02 miniupnpd[9588]: Listening for NAT-PMP/PCP traffic on port 5351

Curiously enough, at the start time, it was 7:18:18 which is exactly 2 hours after the last time it happened.