M4 will only connect to internet via existing router, not direct to modem
I just purchased a pair for M4's to replace my old Archer C2.
If I connect the M4 directly to the fibre modem, setup will fail at the "checking internet connection" step (app reports no internet connection, red light on M4).
If I connect the M4 to the C2, and the C2 to the modem, then the internet works just fine. Both the M4 and C2 correctly default to a very standard dynamic IP setup. No credentials are required by the ISP.
Things I have tried:
- Updating M4 firmware to latest version.
- Swapping to the other M4 unit.
- Selecting "Skip this step" when the internet connection check fails, and manually attempting to swap the DNS server to 8.8.8.8. At first I was unable to perform this step (all the WAN options were blank and uneditable), but I've since managed to change this by accessing the setting while the M4 is connected to the C2, then reconnecting the M4 to the modem. No change.
- Using the MAC spoofing feature to match the address of the C2, just in case the modem or ISP cared about that. No change. It's possible this feature does not work the way I expect it to?
- Different Ethernet cables. No change.
- Different power-on orders for the various components. Doesn't matter if the router is powered on and stable before the M4, or after, or both at the same time.
I spent several hours on this last night, and am kinda running out of things to try here. Any thoughts?