How to change the IP address of a Xiaomi router's LAN port? Changed 192.168.31.1 to 31.2 or 31.1 to avoid pitfalls. After I made the changes, I added three things
incident started when helping a friend move their phone. Their optical modem switched from routing mode to bridging, and Xiaomi AX3000T connected to handle dialing. But the installer accidentally said, "Your router's network segment collided with our upper-layer devices, better fix it." My friend opened 192.168.31.1 and searched for a long time but couldn't find the entry point for changing the IP. Call me. Xiaomi's LAN port entry point is indeed hidden, and before modifying, you need to figure out which network segment to switch to; if you change it wrong, you won't be able to access the backend.
later, I went to his home to remotely video guide the modifications, and casually pulled out my own camera to review it as well. This article will clearly explain "why it was changed, where it was changed, what it was changed to, and what needs to be added after the changes." If you just want to access the backend and don't need to change your IP, just check the 192.168.31.1 login portal.
first clarify: the LAN port IP is the router's "house number." Usually, there are three reasons to change it
router's LAN port IP is the backend address you enter in your browser, and it's also the basis for assigning subnets to the devices below. Xiaomi's default is 192.168.31.1. Honestly, this 31 network segment has a much lower chance of overlapping with the mainstream 192.168.1.1 and 192.168.0.1, so most family users don't need to change at all.
there are basically three situations where you really need to take action:
| what's going on | how do I change it | how I felt after stepping on it |
| the optical modem can be changed to bridge, the router's dial-up | can be changed or not, and if the segment doesn't clash, don't touch it | . A friend's home is occupied by upper-layer devices occupying 31 subnets, so they had to |
| two routers cascaded together (one mounted below as an AP or secondary router) | two devices are switched to different network segments. For example, if 31.1 and 31.2 | are not changed, the next machine will not get the correct gateway, and the device will be intermittent and unresponsive. |
| the company's VPN or remote office software network segment happens 31 | to be changed to a segment other than the common one. For example, 192.168.50.1 | colleagues outside 31.x can't connect to the company intranet, and after an overnight search, it turns out to be a network segment conflict |
pay attention to a pitfall: the is more important than the segment you change to the action itself. If you change it to 192.168.1.1, and the upper-layer optical modem also manages 192.168.1.1, then you're in conflict—how to determine whether the current 31.1 is connected to the optical modem or router is detailed in my IP conflict troubleshooting article. The principle for choosing a network segment is simple: avoid the address of any device at home.
Where to
change: Xiaomi's backend entry is hidden deeper than others, but not in the mobile app
to get to the point: this setting can only be changed in the webpage backend; there's no entry in the Mijia app. At first, my friend spent ages searching through the toolbox in the Mijia app, but it was all in vain. You can operate it on your phone too—open 192.168.31.1 in your browser and use it as a web page.
I wrote the AX3000T latest firmware as I wrote. The old firmware locations differ slightly but are largely the same:
- open
192.168.31.1, enter the management password to enter the backend (if you forgot the password, check the article on password recovery, don't rush to reset it). - At the top, go to 'Common Settings' → 'LAN Settings'. Some firmware versions call it 'LAN Settings'
- find the 'LAN IP address' field. By default 192.168.31.1
- change it to the new address you want, such as 192.168.31.2, and click 'Save'
The moment
is saved, the router will restart the network service, which lasts about ten seconds to half a minute. During this time, the page will freeze and spin, so don't keep clicking save—wait for it to jump on its own. After the jump, you'll find your browser is still stuck on the old page and can't refresh—that's normal, because the backend address has changed. You need to manually enter a new IP in the address bar, like 192.168.31.2, to re-enter.
Three things to do after
changes: missing even one will cause a monster problem
changing the LAN port IP doesn't mean saving is done; the following three steps are the key. At my friend's place, after the first change, I got stuck on the third step. His two phones just couldn't get online, and in fact, they cached the old gateway information.
the first item, confirm that the DHCP allocation range has changed accordingly. normally, Xiaomi will automatically adjust the DHCP pool to a new network segment (for example, 192.168.31.100-254), but to be safe, check the DHCP switch and address pool in the backend "LAN Settings." If your home has previously manually turned off DHCP or configured static IPs for your device, then you have to manually change all static IPs—there's no way to be lazy.
second item, reconnect all lower hanging equipment once. connected phones and computers still remember the old gateway 192.168.31.1, a fake issue appearing where WiFi is full but webpages cannot be opened — I wrote about this kind of "no network at full bar" troubleshooting in the article WiFi no internet connection. The fastest method is to "forget this network" on your phone and reconnect; the computer can disable it and then enable the wireless network card.
the third item, check the upper-level link. if this Xiaomi still has a main router (for example, used as an AP), the new network segment should be offset from the main router's segment. Also, there are specific points to how to connect the LAN port IP and which port to plug into the network cable in AP mode. The details of how to connect router as a switch are covered in the article using the router as a switch. If this device is the main router dial-up, just make sure the WAN port status is normal.
What to do if you can't access the backend after correcting
errors: Two self-help methods, none of which you need to reset
most common mishaps are changing the IP to a network segment that conflicts with existing devices, or accidentally entering the wrong data, causing the backend to "lose contact" after saving. Don't panic, these two moves can basically save you :
first trick: guess the new address. you lose whatever you change. For example, if you originally want to change it to 31.2 but actually save 31.20, then try all the common options. If your phone is connected to a router, check the IP listed in the WiFi details section under "Gateway" or "Router"—that is the current backend address. This method is the most accurate.
second trick: use the Mi Home app as a backup. Although the app can't change the LAN port IP, the device detail page shows the router's current internal network address and can directly redirect to the webpage backend. The premise is that this router has previously been linked to your Mi Home account—so my habit is to bind the Mi Home first thing a new router. When something goes wrong, it's like a lifeline. For what remote management can do, check out my post Mi Home App Remote Management.
if both attempts fail, then consider long-pressing Reset to restore the factory. Restoring all factory settings to zero, reconfiguring WiFi names and passwords, and reconnecting smart devices one by one—a significant cost—if you have many smart devices at home, you can imagine the scene of reconnecting the 62 devices I had in that post. So before changing your IP, write down the new address in your memo—this habit is worth a hundred times of regret.
three most frequently asked questions, answered all at once
"After changing to 31.2, can the original 192.168.31.1 still be used?" cannot. If the LAN port IP is changed, it's changed; the old address is invalid, and entering the old address in the browser either won't open or it will be accessed on another device (if your optical modem happens to be 31.1). Remember to update your favorites.
"Will changing the LAN port IP affect internet speed?" won't. This is purely a change to the address book and has nothing to do with wireless speed or bandwidth. If your internet speed isn't good, check the four points in the speed check article—don't rush to reckless treatments.
"After switching to bridge via optical modem, does the router's LAN port IP have to be changed accordingly?" not necessary, and in most cases it doesn't need to be changed. Only when the upper-layer devices occupy the 31 network segment (like a friend's operator-customized environment) should it be avoided. There are many more important aftermath matters for optical modem bridging itself. In my article modifying optical modem bridge, I listed four items, all of which had higher priority than IP changes.
Finally, summarize the order: first think carefully about why you want to change it→ choose a network segment that won't cause collisions→ change it in the web's backend LAN settings→ save it, then log in again with the new address→ perform a DHCP check, reconnect the device, and confirm the upstream link three steps. That time at my friend's house, it took only about ten minutes from finding the entrance to finishing everything, and the slowest part was just rework after a crash. Get the order right, this job takes ten minutes.
