Create Guest Network On Xiaomi Mi Router Ax1800 Fixed [top] Instant

Here’s a step-by-step guide to create a guest network on the Xiaomi Mi Router AX1800 and ensure it’s fixed (i.e., stable, isolated, with a permanent SSID/password — not subject to random changes).

3. The “Fixed” Report – Common Failure Points & Solutions

Many users report guest network instability (dropped connections, no DHCP, no internet). Below are verified fixes. create guest network on xiaomi mi router ax1800 fixed

| Issue | Symptom | Root Cause | Fixed Solution | |-------|---------|------------|--------------------| | 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”. | Here’s a step-by-step guide to create a guest

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.” set Primary DNS 8.8.8.8

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.

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
Share by: