Bringing up USB tethering connection manually via SSH?

[joshf87]

I have an RT-AC3100, in short, my main and only means of a decent internet connection is to use my phone via USB tethering.

The issue is that I disconnect my phone from the router a lot (hotplugging or disabling tethering before disconnecting the cable, makes no difference). Sometimes I can connect/disconnect it many times and enable the USB tethering option on the phone and the internet will work fine but sometimes the internet won't come up until I reboot or power cycle the router, which can be inconvenient for all the devices connected to it.

In this latest instance, the web interface said everything was fine but the Internet LED was still red and there was no internet connectivity:

The log kept repeating the lines about adding multi routes:

Apr 14 07:04:38 rc_service: ntp 812:notify_rc restart_diskmon
Apr 14 07:04:38 disk_monitor: Finish
Apr 14 07:04:39 rc_service: ntp 812:notify_rc restart_upnp
Apr 14 07:04:39 rc_service: waitting "restart_diskmon" via ntp ...
Apr 14 07:04:39 disk_monitor: be idle
Apr 14 07:04:40 miniupnpd[868]: shutting down MiniUPnPd
Apr 14 07:04:40 miniupnpd[894]: HTTP listening on port 55452
Apr 14 07:04:40 miniupnpd[894]: Listening for NAT-PMP/PCP traffic on port 5351
Apr 14 07:05:28 crond[363]: time disparity of 611205 minutes detected
Apr 14 18:44:50 dnsmasq-dhcp[356]: DHCPREQUEST(br0) 192.168.2.102 c8:60:00:c2:f0:df
Apr 14 18:44:50 dnsmasq-dhcp[356]: DHCPACK(br0) 192.168.2.102 c8:60:00:c2:f0:df HTPC-2
Apr 14 18:44:51 dnsmasq-dhcp[356]: DHCPREQUEST(br0) 192.168.2.180 00:1f:bc:11:ed:2e
Apr 14 18:44:51 dnsmasq-dhcp[356]: DHCPACK(br0) 192.168.2.180 00:1f:bc:11:ed:2e Z170-ClassK
Apr 14 23:04:39 disk_monitor: Got SIGALRM...
Apr 15 05:53:24 dnsmasq-dhcp[356]: DHCPREQUEST(br0) 192.168.2.180 00:1f:bc:11:ed:2e
Apr 15 05:53:24 dnsmasq-dhcp[356]: DHCPACK(br0) 192.168.2.180 00:1f:bc:11:ed:2e Z170-ClassK
Apr 15 05:55:41 dnsmasq-dhcp[356]: DHCPREQUEST(br0) 192.168.2.102 c8:60:00:c2:f0:df
Apr 15 05:55:41 dnsmasq-dhcp[356]: DHCPACK(br0) 192.168.2.102 c8:60:00:c2:f0:df HTPC-2
Apr 15 15:37:14 kernel: usb 2-2: USB disconnect, address 3
Apr 15 15:37:14 kernel: rndis_host 2-2:1.0: usb0: unregister 'rndis_host' usb-0000:00:0b.1-2, RNDIS device
Apr 15 15:37:14 lldpd[445]: removal request for address of 192.168.42.242%12, but no knowledge of it
Apr 15 15:37:14 hotplug: remove net usb0.
Apr 15 15:37:14 kernel: usb 2-2: new high speed USB device using ehci_hcd and address 4
Apr 15 15:37:14 wan: finish adding multi routes
Apr 15 15:37:14 WAN_Connection: Ethernet link down.
Apr 15 15:37:15 DualWAN: skip single wan wan_led_control - WANRED off
Apr 15 15:37:19 kernel: usb 2-2: USB disconnect, address 4
Apr 15 15:43:13 kernel: usb 2-2: new high speed USB device using ehci_hcd and address 5
Apr 15 15:43:19 kernel: usb 2-2: USB disconnect, address 5
Apr 15 15:43:20 kernel: usb 2-2: new high speed USB device using ehci_hcd and address 6
Apr 15 15:43:20 kernel: rndis_host 2-2:1.0: usb0: register 'rndis_host' at usb-0000:00:0b.1-2, RNDIS device, ba:81:df:42:d8:9e
Apr 15 15:43:20 hotplug: add net usb0.
Apr 15 15:43:20 hotplug: Got net usb0, vid 0x22b8, pid 0x2e24.
Apr 15 15:43:22 hotplug: set net usb0.
Apr 15 15:43:25 WAN_Connection: Ethernet link up.
Apr 15 15:43:30 wan: finish adding multi routes
Apr 15 15:43:36 wan: finish adding multi routes
Apr 15 15:43:41 wan: finish adding multi routes
Apr 15 15:43:46 wan: finish adding multi routes
Apr 15 15:43:51 wan: finish adding multi routes
Apr 15 15:43:56 wan: finish adding multi routes
Apr 15 15:44:01 wan: finish adding multi routes
Apr 15 15:44:07 wan: finish adding multi routes
Apr 15 15:44:12 wan: finish adding multi routes
Apr 15 15:44:17 wan: finish adding multi routes
Apr 15 15:44:22 wan: finish adding multi routes
Apr 15 15:44:28 wan: finish adding multi routes
Apr 15 15:44:33 wan: finish adding multi routes
Apr 15 15:44:38 wan: finish adding multi routes
Apr 15 15:44:44 wan: finish adding multi routes
Apr 15 15:44:49 wan: finish adding multi routes
Apr 15 15:44:54 wan: finish adding multi routes
Apr 15 15:44:59 wan: finish adding multi routes
Apr 15 15:45:04 wan: finish adding multi routes
Apr 15 15:45:10 wan: finish adding multi routes
Apr 15 15:45:15 wan: finish adding multi routes
Apr 15 15:45:20 wan: finish adding multi routes
Apr 15 15:45:25 wan: finish adding multi routes
Apr 15 15:45:30 wan: finish adding multi routes
Apr 15 15:45:35 wan: finish adding multi routes
Apr 15 15:45:41 wan: finish adding multi routes
Apr 15 15:45:46 wan: finish adding multi routes
Apr 15 15:45:51 wan: finish adding multi routes
Apr 15 15:45:56 wan: finish adding multi routes
Apr 15 15:46:01 wan: finish adding multi routes
Apr 15 15:46:07 wan: finish adding multi routes
Apr 15 15:46:12 wan: finish adding multi routes
Apr 15 15:46:17 wan: finish adding multi routes
Apr 15 15:46:22 wan: finish adding multi routes
Apr 15 15:46:27 wan: finish adding multi routes
Apr 15 15:46:32 wan: finish adding multi routes
Apr 15 15:46:38 wan: finish adding multi routes
Apr 15 15:46:43 wan: finish adding multi routes
Apr 15 15:46:48 wan: finish adding multi routes
Apr 15 15:46:53 wan: finish adding multi routes
Apr 15 15:46:58 wan: finish adding multi routes
Apr 15 15:47:04 wan: finish adding multi routes
Apr 15 15:47:09 wan: finish adding multi routes
Apr 15 15:47:14 wan: finish adding multi routes
Apr 15 15:47:19 wan: finish adding multi routes
Apr 15 15:47:24 wan: finish adding multi routes
Apr 15 15:47:29 wan: finish adding multi routes
Apr 15 15:47:35 wan: finish adding multi routes
Apr 15 15:47:40 wan: finish adding multi routes
Apr 15 15:47:45 wan: finish adding multi routes
Apr 15 15:47:50 wan: finish adding multi routes
Apr 15 15:47:55 wan: finish adding multi routes
Apr 15 15:48:01 wan: finish adding multi routes

That isn't always the case.. the log may not say anything new at the time when reconnecting the phone, and this bug isn't anything new to 384, 382, or even 380. I tried seeing if I could fix it in SSH but I got as far as "ip link set usb0 up", which at least turns off the red LED but still no internet.