Hello friends, I come with SOLUTION! This is working with AC68U / AC1900P and should work with other routers, but may require slight modification.
robocfg vlan 1 ports "2 3 4 5t"
robocfg vlan 2 ports "1 5t"
nvram set lanports="2 3 4"
nvram set wanports=1
That gets the aimesh node working...