ahmad:tdgeek:khull: Don't believe so - Apple does not support VLAN tagging
Sorry, in answer to the OP, as per what Khull said. You need to connect the AEBS/TC to the ONT connected router
So would that mean I have to put the ONT connected router into some "dumb bridge" mode?
Its not completely dumb so you still have to check if there are anything like DHCP and DNS that you also want to turn off or set to be relayed from the router (the router thats still functioning as a router and connected to the ONT).
It sounds like bridge mode doesn't turn off the Apple's DHCP, which makes it allocate IP numbers instead of passing all that to the router. If there's no way to stop it, try setting the router to allocate higher LAN numbers such as x.x.x.100 to x.x.x.200, so that it doesn't allocate the same numbers as the Apple.