Your Wi-Fi router is leaking airtime to legacy devices, and here is the 10-second fix

Published Aug 23, 2026, 2:30 PM EDT Jasmine is Software and PC Hardware Author at XDA with years of tech reporting experience ranging from AI chatbots right down to gaming hardware, she's covered just about everything. Whether it's breaking news about the latest AMD NPUs or creating video tutorials on social media platforms, Jasmine has contributed to the world of AI and tech in a variety of ways including interviewing the CEO of Razer, AMD's Director of Product Marketing and the VP of Lenovo. Passionate about gaming and PC technology, she has built countless computers, keyboards and other peripherals - knowing them inside and out. Even though you have a modern Wi-Fi 6, 6E, or 7 router and high-spec endpoints capable of gigabit wireless throughput, your network might still suffer from random latency spikes, package jitter, and sluggish page loads. This is down to airtime starvation. Wi-Fi is a shared half-duplex medium. It doesn't matter how fast your gaming rig or laptop is if the wireless radio spectrum is tied up waiting for slow legacy transmissions. Almost every consumer router ships with backward compatibility stretching back to 1999, ensuring it meets 802.11b legacy standards and broadcasts discovery beacons and management frames at an agonizingly slow 1–2 Mbps. Backward compatibility is actively poisoning your wireless performance. By raising the minimum basic data rate or disabling legacy 802.11b rates in your router settings, you can instantly eliminate beacon overhead, free up airtime for modern devices, and cut wireless latency across your entire network in under 10 seconds. How does Wi-Fi actually work? It's a half-duplex medium To understand why this happens, you need to understand the physics of Wi-Fi airtime and management overhead. Under the hood, Wi-Fi is half-duplex. This means it's carrier-sense multiple access with collision avoidance. Only one device can transmit on a given channel at any time. That's for both broadcasting and receiving. Every Wi-Fi router broadcasts beacon frames about 10 times per second, at 100ms intervals, to announce its SSID, supported rates, and security parameters. To ensure ancient hardware from 25 years ago can discover the network, routers transmit these beacons and broadcast frames at the lowest possible baseline speed of 1Mbps using legacy DSSS modulation. By transmitting a 500-byte beacon at 1Mbps, this consumes 54 times more radio airtime than transmitting at a modern rate like 54Mbps or 144Mbps. On a busy 2.4 GHz band with multiple SSIDs like a main, guest, and IoT, legacy beacon traffic alone can devour 15% to 30% of your total wireless capacity before a single actual data packet is transferred. Your devices might be causing issues Staying connected isn't always the best option Mesh Wi-Fi can also improve coverage outside your home You also might fall victim to the sticky edge trap and modulation collapse. This is because distant clients can drag down your cell. When a smartphone or smart plug drifts to the edge of your property, it negotiates lower modulation and coding scheme rates. If the router permits a 1Mbps fallback, that distant device stays connected while taking massive time slices to send tiny packets, while all the other devices wait in a queue and experience latency and other networking issues. All while the device that is still connected and dragging everyone else down barely gets a usable signal anyway. By raising the minimum data rate cutoffs, the bottom tier falls back. Instead of clinging to a broken high-latency connection, the perimeter devices disconnect cleanly and roam to a closer access point or switch over to cellular data, which should hopefully rectify this problem. What settings should you adjust to fix the problem? This depends on your router's firmware If you're hoping to fix this problem, then there are a few toggles to look out for across popular router firmware interfaces. The main settings to watch for are the minimum data rate setting, the basic rate setting, and the 802.11b support setting, which sometimes appears as multi-cast rate under your advanced wireless settings. Different firmware implementations are available depending on your router. If you have an Asus router, then you can use Asus RWT or Asus Merlin to adjust your settings. Go to Wireless, then Professional, then Modulation Scheme, and set it to OFDM only, or set Basic Rate to 12 or 24 Mbps. If you're running UniFi/Omada SDN firmware, go to Settings -> Wi-Fi -> Advanced -> 2.4 GHz -> Minimum Data Rate Control, and slide from 1Mbps up to 12Mbps; for a higher-density network, 6Mbps can work too. If you're on OpenWRT then go to Network, then Wireless, then Edit Device, then Advanced Settings, and then set Min Transmission Power and Prune Legacy Rates to exclude 1 to 5.5 and 11 Mbps. This should automatically set your rate to 12 Mbps and higher. If you're using TP-Link or Netgear, then you can disable legacy 802.11b/g mode in favor of 802.11n/ac/ax mixed. This should disable the legacy mode altogether and hopefully stop your router from broadcasting at these legacy rates. The rate you set will depend on the band you are using. If you're on the 2.4GHz band, setting a minimum rate of 12Mbps should be safe for virtually all modern IoT. Or if you want to be ultra-conservative, then set it to 6Mbps to ensure that all of your devices are still accessible and function correctly. If you're running on a 5GHz band, then you can set your minimum rate to 12Mbps or 24Mbps, but this should be reserved for 802.11a/n/ac/ax clients only. Don't let your network fumble It might be choking itself Consumer networking gear is essentially held hostage by conservative defaults designed to prevent customer support tickets for hardware that belongs in a museum. You might not even own or still use any of this legacy hardware, but your router still has the settings there in place just in case. You can fix this problem by opening your router's web portal right now and turning off 802.11b legacy rates. Bump your minimum basic data rate to 12 Mbps and unlock the low-latency, responsive Wi-Fi your hardware was designed to deliver.