A RT-AC86U (lovely device) The Zyxel VM1312 contains the BCM63168U chipset (Broadcom) the DSL-AC68U uses a MediaTek chipset for DSL which for UK users has caused many issues and G.inp is not usually supported.
So use Zyxel as Modem (Bridge) then uses RT-AC86U (as primary AiMesh) and set DSL-AC68U as Child/Node (AiMesh) the latest DSL-AC68U firmware supports AiMesh for child /node option.
Version 184.108.40.206.384_81140 (from ASUS download Servers)
I was using AiMesh and it worked well ;-)
BTW – on the rear of the RT-AC86U, there is a label with a year of manufacture on it, I cannot recall but I seem to remember units made in 2017 may have had (some) 2.4GHz wifi radio issues and others have reported that on occasions the router will not restart after it has been UI rebooted ?
No such thing as the perfect router, but that’s the price for mass production
In a completely sane world, madness is the only freedom (J.G.Ballard).
RT-AC86U: Especially 2018 versions may be troublesome, 2.4G issues seems to be introduced in 2018 while early 2017 and latest 2019 are ok. In my opinion if you think about buy an 86U you should take a new one manufatured 2019 (or later ).
Hanging after reboot is a known problem for all 86U, some have it more often than others with no reason. Latest firmwares could help but still seen in some case.
Thats why it would be helpful if someone brave with an 86U and more often seen it to test if GT-AC2900 firmware on it would solve it – then we would know it could be solved with firmware if Asus is willing to fix or that it is a hardware design failure.
DSL-AC68U: Good to hear that it can be reused as Aimesh node now with offical firmware!
Is it only enhanced to support Wireless backhaul or can it be used with LAN-backhaul too???
Have you tested both?
What I can remember they only did wifi-backhaul still missing wired.