When running a test on the router I got the error “The internet service provider is not responding to PPPoE packets”
Taken literally, the message means the router is working well enough to attempt to start the PPP session and log the lack of response, so more often this indicates a problem with the connectivity external to your router.
Presumably all other aspects of the Fritz!box are working normally (LAN wired ports and Wi-Fi, DHCP) otherwise you would not have access to the logs?
In which case sending a replacement router is trial and error if they have run out of things to test, such as resetting to router to defaults (which I would not recommend if you have loss of service, only if the router itself becomes unresponsive).
One of the options if you are on FTTP with an ONT should have been to have a laptop or desktop setup the PPPoE login details plugged directly into connection bypassing the router and see if you have the same type of error in which case it's unlikely to be the router's fault.
Other than that cannot really say as we don't know what else they have had you try.
prlzx on Zen: FTTC (VDSL) at ~40Mbps / 10Mbps
with IP4/6 (no v6? - not true Internet)
Edited by prlzx (Mon 10-Jul-23 17:17:12)