My RUT240 was working fine in bridge mode to a Draytek 2860, then all of a sudden it wasn't. Checking Status/Routes I see that it isn't connecting to the WAN port MAC address of the Draytek, although it is entered correctly (it hasn't changed from when it was working) in the field on the Mobile page. I also tried Passthrough mode with the same result.
What can possibly have gone wrong here? I am using the latest firmware, have rebooted both devices in sequence (RUT240 first, then Draytek and vice versa). I am at a loss and it's driving me nuts!