Configuring an OpenWrt router behind an ISP provided router

@ZBastien were you ever able to get this working? I am trying to do the same thing you did but i am having issues. My isp touter is also with the dhcp active and i have my openwrt router Im connected isp lan to openwrt wan.

I have moved your post to a new thread since the previous topic was 5 years old! A lot has changed in that time, so what was relevant then may not be now. (besides, the user you tagged hasn't been active on the forum in nearly a year).

Please describe the issues you are having and how you are testing things. We'll also need to see your configuration:

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:
Remember to redact passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall
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