Create Guest Network On Xiaomi Mi Router Ax1800 Fixed

If this worked, stop here. If your guests see "Connected, no internet" or "Authentication error," proceed to Part 2.

| Issue | Symptom | Root Cause | | |-------|---------|------------|--------------------| | No IP assigned | Devices stuck on “Obtaining IP address” | DHCP server for guest network crashes or conflicts with main DHCP range. | Static IP Range: Set Guest DHCP range outside main pool. Main: 192.168.31.100–200 Guest: 192.168.33.50–150 (different subnet) | | Guest sees main LAN devices | Security breach | AP isolation disabled or incorrect VLAN tagging. | Enable AP Isolation: In Guest Wi-Fi settings, check “Allow guests to access each other” → NO . “Allow guests to access local network” → NO . | | Slow / intermittent speed | High latency, packet loss | Co-channel interference with main 2.4 GHz network. | Fixed Channel: Set main Wi-Fi to channel 1,6,11 (e.g., ch6). Set Guest Wi-Fi to same channel (AX1800 forces same radio). Reduce beacon interval to 100ms. | | Clients disconnect every 30 min | Logout loop | Default DHCP lease time too short (2 hours). | Increase Lease Time: Via SSH or config file → Set dhcp_lease_time=86400 (24 hours). Not exposed in GUI – requires advanced access. | | No internet for guests | DNS failure | Router’s DNS proxy doesn’t forward guest subnet. | Manual DNS: In Guest settings, set Primary DNS 8.8.8.8 , Secondary 1.1.1.1 . Disable “Use same DNS as main network”. | create guest network on xiaomi mi router ax1800 fixed

Check for updates and install the latest stable firmware version. Fix 3: Guests Can't Get an IP Address (DHCP Lease Error) If this worked, stop here

(Optional) You may see options to set (how long the network remains active) or Bandwidth limits for guests. Save Changes : Click Save to finish the setup. Troubleshooting "Fixed" Issues | Static IP Range: Set Guest DHCP range outside main pool

Method 1: Create Guest Network via the Mi Home App (Recommended)

To make sure your new network is running perfectly, let me know:

Enter the default gateway IP address into the URL bar: 192.168.31.1 (or type miwifi.com ). Enter your administrator password to log in. Step 2: Locate Wi-Fi Settings Click on from the top menu bar. Select Wi-Fi Settings from the sub-menu. Step 3: Configure Guest Network