Report: 2x RT-AX68U in AiMesh (wireless backhaul) mode with v386.4 Alpha 1 RMerlin firmware.
Background: Customer has upgraded to nominal 600Mbps down, 100Mbps up, speeds (from 300/50Mbps) ISP is capable of sustained 650d/110u performance. Upgraded from 2x RT-AC86U in AiMesh wireless backhaul mode with identical firmware. Home on four levels and approximately 3,900 SqFt of usable area.
Executive summary: As expected, the newer RT-AX68U's excelled at throughput vs. the older design RT-AC86U's. Actually, surprisingly so. While the RT-AC86U could hit 150-210 Mbps download to the lowest level from the AiMesh node a floor and many walls above. The RT-AX86U could hit 350-430Mbps with a single router (before the AiMesh node was added) to this same device (current laptop, plugged into AC power) from two floors above and a few extra walls in between too.
Before installing at the customer's home, I tried to get the RT-AX68U to be added as a node to my (two) RT-AX86U's. It was running a very old 386.xx stock firmware (386.4069x, from memory). It could connect but would continually reset itself and effectively make the network unusable. Flashing to RMerlin 386.4 Alpha 1 made it correctly work with my RT-AX86U's without further issues on the wireless front.
On an interesting note, after I saw the performance was above my expectations on
my network, I tried using the WPS Button reset method for the RT-AX68U and could not successfully reset it. Using the GUI wasn't an issue (or the Reset Button itself). Maybe
@RMerlin needs to investigate this? And of course, it may have been already fixed in the latest GPL releases for this model.
While a single RT-AX68U proved very capable of replacing a 2x RT-AC86U setup, the customer insisted on having a second RT-AX68U installed as an AiMesh node. Again, I tested with the shipping firmware noted above, and the WPS Button reset worked every time. The node also connected immediately to the main router too with the stock firmware. After upgrading to the 386.4 Alpha 1 firmware, the WPS Button reset would not work on the node either.
With a beefy gaming desktop and an Intel AX200 Wi-Fi adaptor onboard through a couple of walls on the same floor as the main router, the speeds could easily hit the ISP's maximums (650/110). With random peaks (thanks to cable modems!) to 800Mbps or even higher).
For (nominally) $60 cheaper than an RT-AX86U, the RT-AX68U is a good match for less than 1Gbps service. I will be keeping a close eye on this installation to see if the performance and stability continue.
Compared to the slightly less expensive RT-AX58U (around $10 less here), the RT-AX68U is the better router by far.
Except for the WPS Button reset not working with this Alpha 1 build, the router has shown to be a very worthwhile upgrade over the previously recommended class leading AC-class RT-AC86U.
I don't recall reading about any WPS Button issues with this model and this Alpha 1 firmware? Should I try yet another example to test for hardware issues? (The performance and stability of the setup in the last week do not point to any such conclusions so far).