skip navigation

Xiaomi Mi Router Ax1800 Fixed | Create Guest Network On

Technical Report: Creating and Troubleshooting Guest Networks on Xiaomi Mi Router AX1800 Go to product viewer dialog for this item.

This report provides a comprehensive guide to establishing a secure guest network on the Xiaomi Mi Router AX1800

. A guest network enhances security by creating a separate subnet for visitors, ensuring they cannot access your primary devices or local files. 1. Configuration Methods

You can set up a guest network using either the official mobile application or the web-based administration panel. Method A: Using the Mi Home / Xiaomi Home App

The mobile app is the most streamlined method for managing guest access. Launch the App: Open the Mi Home app (or Xiaomi Home) and log into your Mi account. Select Device: Tap on your Mi Router AX1800 from the device list.

Navigate to Toolbox: Select the Toolbox tab at the bottom, then tap More if "Guest Wi-Fi" is not immediately visible.

Enable Guest Wi-Fi: Tap on Guest Wi-Fi and toggle the switch to On. create guest network on xiaomi mi router ax1800 fixed

Set Credentials: Define a unique Network Name (SSID) (e.g., "Guest_WiFi") and a strong Password. Save: Tap Save or Done to activate the network. Method B: Using the Web Management Interface

This method provides more granular control over network settings.

Connect to Router: Ensure your computer or phone is connected to the 's primary network via Wi-Fi or Ethernet.

Access Admin Page: Open a web browser and enter 192.168.31.1 or router.miwifi.com.

Log In: Enter your administrator password. If you haven't set a custom one, it often defaults to your primary Wi-Fi password.

Find Guest Settings: Go to Settings > Wi-Fi Settings or Advanced > Guest Network. Fix 1: Check Operation Mode (Access Point Mode)

Configure: Toggle the Guest Network switch to On. You can choose to enable both 2.4 GHz and 5 GHz bands or just one (2.4 GHz is recommended for better range for guests).

Apply Changes: Enter the SSID and password, then click Save. 2. Best Practices for Guest Security

To maintain the integrity of your home network, implement these settings:

What is the Guest Wi-Fi feature of the Xiaomi Router BE3600?

Fix 1: Check Operation Mode (Access Point Mode)

If your Xiaomi AX1800 is set up as a secondary router (Access Point mode) connected to a main ISP modem, the Guest Network feature is often disabled automatically because the router is not handling the DHCP (IP assignment).

  1. Go to Common Settings > Internet Settings.
  2. Check if the mode is set to Wireless Repeater or Access Point (Wired).
  3. The Fix: You cannot use the native Guest Network feature in Access Point mode. You must set the router to Router Mode (PPPoE or Dynamic IP) to unlock the Guest Network feature.

4.2 Force 2.4 GHz Only (For Legacy Device Fix)

# Edit /etc/config/wireless
config wifi-iface 'guest'
        option device 'radio0'   # radio0 = 2.4 GHz on AX1800
        option network 'guest'
        option mode 'ap'
        option ssid 'YourHome_Guest'
        option encryption 'psk2'
        option key 'YourPassword'
        option isolate '1'       # AP isolation

Part 4: Firmware Update – The Ultimate Fix

If none of the above works, your router is likely running the launch firmware (1.0.11) which has a completely broken guest network stack. Go to Common Settings > Internet Settings

The Ultimate Fix: Manual Firmware Flash

  1. Download the latest stable firmware for the AX1800 (Chinese or Global model) from miwifi.com or community forums (e.g., 1.0.68).
  2. Connect via web interface (192.168.31.1).
  3. Go to System -> Manual firmware update.
  4. Upload the .bin file.
  5. Crucial: After update, do not restore from a backup. Manually reconfigure the Guest Network from scratch.

If you own the Chinese variant (RB01), flash the international firmware via the UART method (advanced users only) to unlock stable guest networking.

6. Troubleshooting “Fixed” Issues

| Problem | Fix | |--------|-----| | Guest network disappears after reboot | Disable Auto Maintenance in router settings | | SSID changes by itself | Turn off AIoT Auto-Scan or Smart Wi-Fi features | | Guests can see main network | Double-check: Allow Intranet Access = OFF | | Cannot find Guest Network in app | Update Mi Wi-Fi app or use web interface |

The Walled Garden: Fixing the Guest Network on a Xiaomi Mi Router AX1800

There is a quiet violence in a network that refuses to obey. You log into the Mi WiFi app or the web interface at 192.168.31.1, tap the Guest Network toggle, and watch it light up—green, hopeful. But your visitor’s phone just spins. No IP. No internet. Just the cruel infinity of “Obtaining IP address.”

This is the story of fixing the guest network on a Xiaomi Mi Router AX1800. But beneath the DHCP leases and SSID broadcasts lies something deeper: the anxiety of intrusion, the architecture of mistrust, and the strange peace of a walled garden finally holding firm.

5. Optional: Fix Guest Network IP Range

If you want the IP range fixed (not changing after router reboot):