Resolving IP Conflicts When Using Mobile Hotspots > 자유게시판

If you're relying on your smartphone as a Wi-Fi source you might notice that your network performance degrades suddenly. This is often due to router conflicts with mobile tethers. These conflicts happen because they simultaneously control network routing. Sometimes they end up using overlapping gateway addresses, which causes packet loss.

Start with reviewing your current IP assignments. Look at the DHCP pool your router is using. Most home routers default to 192.168.2.x. Now check the subnet your phone is assigning when it acts as a hotspot. Many mobile carriers use the same ranges, which causes network confusion. If both devices are using the overlapping IP scope, your devices can't tell how to route packets, read more leading to intermittent outages.

Shut down the mobile hotspot and observe network behavior. If it does, the problem is due to IP overlap. Now reconnect the tether and check if your smart home devices go offline. Sometimes your phone will assign itself the same IP as your router, causing DHCP exhaustion. You can check this by looking at your device's network details on your computer or phone. Look for messages about IP conflicts.

Many users encounter nested NAT. This occurs when your mobile tether acts as a router and your router is in router mode. This double layer can increase latency and block VoIP services that rely on UPnP. To fix this, you can try switching your router to access point mode. This turns your router into a wireless access point and lets your phone handle DHCP duties. Alternatively, you can turn off your router’s SSID and use only the phone’s hotspot, though this may decrease signal stability.

Adjust your mobile hotspot configuration. Some phones allow you to modify the subnet mask. If you're using a a crowded channel on your router, and your phone is using a conflicting frequency, signal degradation happens. Try switching your router to an auto-channel setting. You can use a Wi-Fi signal mapper to see what other networks are nearby.

Perform a full reboot of your network. Sometimes a factory reset of network services clears up stuck DHCP leases. After restarting, reestablish connections incrementally. If the problem returns once the phone resumes routing, you've confirmed the conflict. The best long term solution is to change your router’s subnet to a non-standard range. Try using 172.16.x.x, so it no longer overlaps with your phone's typical carrier allocation. This way, your home and mobile networks operate in parallel.