check you device with lsusb command (usbutils package):
:~# lsusb
Bus 001 Device 005: ID 1bbb:0195 T & A Mobile Phones
NOTE: change static IP address of your LAN to 10.0.0.1 instead of 192.168.1.1. Because on this address 192.168.1.1 you will have administration page of your LTE USB modem.
Plug LTE stick into router USB (With SIM-PIN1 deactivated, this avoids having to configure the PIN in OpenWRT config files)
Check that the LTE stick can be found:
lsusb
Expected result is a device 1bbb:0195, as this is the identifier for the IK40: Bus 001 Device 005: ID 1bbb:0195 ....some display text string....
Edit file /etc/config/network
You must modify the DHCP range ipaddr of interface lan to anything other than 192.168.1.x, as the range 192.168.1.1/24 will get claimed by the Alcatel IK40 once configured as interface. E.g. modify existing ipaddr value to:
Edit file /etc/config/firewall and locate config zone of option name wan and insert the line list network 'lte'
config zone
option name wan
list network 'wan'
list network 'wan6'
# insert the following line to assign the IK40 interface to the wan zone:
list network 'lte'
...
save files, unplug WAN Cable on router, reboot and it's done. Internet will now go via LTE stick.
Remember that the OpenWRT router now has a new LAN IP address (see step 4)
[optional] check routes on OpenWRT device, to see that Internet stuff now gets routed to usb0:
ip route
Output: default via 192.168.1.1 dev usb0 src 192.168.1.189 192.168.1.0/24 dev usb0 scope link src 192.168.1.189 192.168.2.0/24 dev br-lan scope link src 192.168.2.1
Thanks for the above writeup. Question: I want to use the USB LTE router as a fallback option to my fiber wan connection. Do you happen to know what else needs to be done in order to assign less priority to the LTE connection, so that only when you my main wan connection goes down, connectivity automatically transitions to LTE.