XIAOMI AX1800 Mesh Network

Solved
Hello everyone,
I have two XIAOMI AX1800 routers that I want to set up in a mesh network, one connected to the other via a 15m Ethernet cable.
I easily configure the first router, which creates a 192.168.31.xxx network (1 for this router)
When I try to add the second one as they call a new Mesh node, it says it can't find it. Even placing them side by side, with or without an Ethernet cable between the two.
On the other hand, I can configure this second router as a new one, and it creates a 192.168.21.xxx network (1 for it) and becomes a member of the other's network (IP 192.168.31.140)
I should add that the first router is on European ROM (set to France as the country) and the second one is on Chinese ROM. I think the only difference is the list of available WIFI channels ???
Do you see any way to create this Mesh network? Do I need to flash the router's ROM from Chinese ROM to European ROM? If so, where can I find the firmware?
Your opinions are welcome. Thanks a thousand in advance.

3 answers

  1. I found it!
    It was indeed the ROM number.
    By setting the router with the Chinese ROM as the main router, we can connect the one with the European ROM in a mesh network.
    At the first launch of the browser at the address of the secondary router, it complains, saying that the regions do not match. It suggests changing it. Miraculously, the region "China" appears in the list, even though it was missing when I tried to change it in the settings of the European ROM router before.
    On Miwifi, the network now appears mesh and I have 910 Mbps on a wired desktop / 500 Mbps on a laptop with an IPV6 card connected via WIFI throughout the house without difficulty transferring from one WIFI point to another / 320 Mbps on a smartphone connected via WIFI without IPV6
    I hope this can help some people, even if the problem is a bit borderline.

    Best regards.
    4
    1. Thank you for this information, which will certainly be useful to some, although the product is still quite marginal here, we can barely find it on Amazon, and only in an ugly white model.
      But it's true that on paper, it's a product that should be a hit in terms of performance/price compared to what's available in the field.
      Just one question, actually two...
      Do you know if there's a way to configure the mesh in access point mode instead of router mode? That would really be a plus.
      And... the wifi 6 (ax).
      Do you have wifi 6 devices (I’m not talking about the backhaul network between the two APs)?
      I'd like to know if a device connected via wifi 6 to the network does not hog the entire radio band at the expense of older devices that do not support it; I ask this question every time I have the opportunity on various forums and still have no answer.
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    2. Contributor
      @brupalaI read that AP mode is incompatible with mesh mode.
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    3. @brupalaSo here it is:

      - My two devices are connected via cable
      - I have an IPV6 network card on my laptop. << Wi-Fi card for laptop 802.11ax 2974, 5.1 mb/s, Windows 10, Bluetooth MU-MIMO, M.2 Wi-Fi 6, NGFF, Intel AX200NGW >>
      - I don't know if I can configure my devices as AP, and I admit I'm not going to tinker with my network anymore, which works better than I expected :)
      - Regarding your question about bandwidth, I ran a nperf test on my laptop at the same time as on my smartphone (Galaxy Note 9). This is just an example, of course.
      - The phone was at 260 Mbps instead of 300-310 alone
      - The laptop was at 500 instead of 850-900 alone
      So for me, there is no bandwidth cannibalization, provided that the laptop was indeed on IPV6 with the router.
      That said, in the miwifi settings, we can set the QoS for each of the clients. So I believe we can manage this.

      You understand that I did a bit of empirical testing to find the key to the problem, but I am not a network specialist. So I'm sorry if there are inaccuracies in my statements.

      Best regards,
      Gilles
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    4. Contributor
      @vaima120I think you are using the term "ipv6" when it should be "wifi 6".
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    5. @vaima120You insist on IPv6, but I don't think it matters in this case.
      Thank you for the tests,
      after all, 2 devices is not a lot, and well, it's nperf, so under these circumstances, we're testing the internet connection more than the Wi-Fi network itself.
      Also, doing iperf would also require a LAN connection that can keep up, like 10 Gbit/s
      it's a whole setup to put in place to flirt with the limits of ax technology.
      Thanks anyway, this gives me a first reference to discuss the topic.
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