5G mobile broadband avoid double NAT

[Lynx]

Can’t he set static routes and disable masquerading?

See here:

Double Nat Issue (LTE modem + OpenWrt router)

Continuing the discussion from Preventing double NAT: Does the above well-written guide from @mk24 apply to the situation I now have: 192.168.0.1 (OpenWrt Zyxel NR7101 LTE router) 192.168.1.1 (main OpenWrt router) ethernet cable connecting from LAN port of NR7101 to WAN port of OpenWrt router. I want to emulate a poor man's bridge mode like as described here: Assuming @mk24's guide applies to my situation then I can follow it all but can't seem to get it to work properly. When cr…

And here:

Dual Router Puzzle (LTE modem + main router)

I use a Zyxel NR7101 for its LTE modem and as far as I am aware, IP passthrough is not easily obtainable in OpenWrt, and hence I have adopted the following setup with upstream and downstream routers: 192.168.0.1 - Zyxel NR7101 (upstream router with LTE modem); 192.168.1.1 - RT3200 (downstream router); and ethernet cable connecting the LAN port of the Zyxel to WAN port of the RT3200, With help from @psherman, @trendy, @mk24 and @slh in this thread: I have avoided double NAT by disabling ma…