I installed latest Gargoyle firmware (gargoyle_1.9.2-ar71xx-generic-archer-c7-v2-squashfs-factory.bin) on Archer C7 v2 and would like to use it in bridge mode with my CGN2 cable modem/router. C7 works fine as an AP on the same network, but would like to move DHCP responsibility to C7 and get access to QoS.
I have followed instruction posted in "scenario modem". Bringing my CGN2 modem into bridge mode is straighforward. I completed the rest of instructions to the letter, but I don't get internet access in the end.
Tried and retried a couple of time with no avail - most likely it is something really simple that I am missing. I feel really frustated

Can anybody suggest what should I double check?
Thanks!