My company is looking for a LTE router solution for LTE failover connections. I'm currently testing RUTX09 with firmware RUTX_R_00.02.03.1 and have it attached to a Palo Alto PA-220 firewall in my lab. I can't seem to get Bridged Mode to work and can't find any documentation on how it's supposed to be done.
Currently I have one SIM card for MOB1S1A1 (default) interface and I have tested that it works in NAT mode. In Bridged mode I assume that I need to insert the MAC address of the firewall interface (MAC address of PA-220 IF) connected to LAN side of the RUTX09. What I'm not sure of is whether I should have the LAN (default) interface configured with "Bridge interfaces" and whether I should have eth0 and qmimux0 in br-lan. I've tried all possible combinations but the result is always that when I do a DHCP renew on the PA-220 I can see with tcpdump on RUTX09 that DHCP requests are coming in to interface eth0 and br-lan bridge but they don't seem to get passed to qmimux0.
If I could get more information or a sample configuration, I would be very grateful. Alternative if someone could explain how the bridging is done on RutOS (which components used, how DHCP queries are passed/relied), I can probably figure out the rest.