ASUS XD4 struggles with heavy network traffic and constant noise.
ASUS XD4 struggles with heavy network traffic and constant noise.
Hey there. I'm dealing with an ASUS XD4 3-pack mesh router connected through a hardwired TP Link switch. The problem is that the 2.4GHz band is packed (over 30 devices, mostly Sonoff gear like switches, hubs, Google speakers, etc.), and my Sonoff equipment keeps dropping connections. I checked my noisy area with WiFi Man on an Android phone—CH13 is mostly unused, so I switched to CH13 and narrowed it down to just 20MHz. I also capped each 2.4GHz client at 1Mbps. That improved things a lot; before I missed at least five devices. Now everything works fine with all devices connected. When a network command comes from the hub, the Sonoff devices respond correctly and reconnect within about 15-20 seconds. My current setup has phones, TVs, Xbox, and a 5GHz device (phone, tablet, kids' tablet) all working perfectly. Any tips or advice would be greatly appreciated. Also, I'm considering replacing one node with an extra router—maybe add at least one RT-AX59U as the main unit and use the XD4 for mesh APs? Could that fix the 2.4GHz issue?
Which country are you in? CH13 isn't allowed everywhere and even where permitted, it can interfere with channels on channel 11, making it risky to use. It's usually safer to fully overlap with an existing network rather than partially, since WiFi systems detect complete clashes but struggle with partial overlaps.
I've noticed these client devices still can't maintain a connection to channel 13 even when visible. This suggests the issue lies elsewhere. Effective interference removal requires users adjusting their wireless equipment to focus coverage. Simply increasing router power or assuming full output is often ineffective. IoT devices require minimal bandwidth and will pause if they detect disruption. However, many devices generate small amounts of data that together can cause noticeable delays. A well-designed multi-AP setup with targeted antenna settings—covering only the needed zone while preventing overlap—tends to perform best. Be aware though, this approach may add extra noise on crowded channels, potentially affecting neighbors too. My strategy involves lowering each AP's antenna output, isolating IoT gadgets in dedicated VLANs linked to specific SSIDs, and restricting them to nearby access points instead of allowing unrestricted movement.
The aim is to reduce 2.4 GHz interference. Adjust the transmit power on the 2.4 GHz band so it’s sufficient for your devices but not excessive. Focus it only where needed. This might involve changing settings in advanced modes or replacing certain hardware, though I’m unsure about the differences between the routers you mentioned. It seems this process likely requires some experimentation. I don’t understand how Sonoff works to verify if changes are normal, since it could be typical. Many home sensors operate without constant connection because they don’t need it, and their batteries last longer. If your devices use smart switches like I assume Sonoff is, they’re simpler. Transmit power can often be managed at the main node (or even child nodes) via frequency settings in advanced configurations. When checking client lists for each ASUS AI Mesh node, you’ll see a chain icon next to each client. Clicking it lets you bind the client to a mesh node without needing VLANs—though OP can enable isolated guest networks if desired. XD4 supports “guest networks” that offer similar security as VLANs. Edited December 2, 2023 by NobleGamer Clarified statement to OP
Hey there. In Serbia, the wireless rules and restrictions are still evolving, especially after switching from CH13 to CH4. For Wi-Fi, full coverage isn't realistic, so you're right about the limited overlap. You can't easily ask neighbors to lower their signal strength. Following your suggestion, I've lowered the power on all XD4s from Performance to Balance. I've also set up roaming assistance for clients with weak signals (around -70dBm or less). The main challenge seems to be the signal quality inside the apartment—some rooms have weaker connections due to obstacles like switches in walls or kitchen cabinets. The size of the space is about 100 square meters, which can cause signal loss for certain devices. I've separated the 2.4GHz and 5GHz bands on different networks, tried creating a guest network with LAN access on 2.4GHz to shift some traffic, but results haven't improved much. The specs you shared show differences in speeds between bands, especially on the 2.4GHz channel, which might affect performance in that range. Let me know if this makes sense or if you need further clarification.
The RT-AX59U appears to be slightly better than the XD4 when considering certain conditions. It features a 2.4 GHz antenna with either a 3x3 or 4x4 configuration, while the 5.4 GHz side has a 3x3 antenna. The 2.4 GHz band supports 256QAM, which is unusual and could potentially deliver up to 400 Mbps at a 2x2 setup—though it's unclear if this reduces interference. The conflicting specifications in the manual make it confusing.
Routers usually stick to the US channel lineup—1, 6, 11—and it’s generally wiser to choose one of those. There are some rogue devices that completely disregard these settings when they auto-configure, or beginners who aren’t familiar with how channel sizes affect performance. For instance, someone on channel 4 close by is causing major issues: it forces users on channels 1 and 6 to experience interference instead of clear signals. This happens because overlapping channels are treated as background noise, leading to constant clashes and reduced speed or unpredictable latency for everyone involved. The only real advantage remains low-bandwidth IoT devices, which should remain quiet, but streaming video content will quickly become problematic.
I performed a factory reset on the main XD4 router. Because other nodes required a restart as well, I didn’t do it myself, which caused all clients to connect instantly to the main router. It seems my network setup was overly complex—no extra XD4 nodes were needed, and everything is receiving signals properly. Also, the SSID and PASS settings on the switches next to the router are binding MAC addresses, so they weren’t connecting even with the same credentials. Thanks for the helpful feedback.
I’ll include these points for clarity. Sonoff switches often use Multicast for quick discovery and control, which can slow Wi-Fi to around 1Mbps during transmission or reception. To prevent this slowdown, ASUS routers like the ASUSWRT have an option called IGMP Snooping in Advanced Settings. This tells the router to treat multicast traffic as regular (Unicast) data, keeping speeds higher and improving wireless performance. However, it might affect devices that can’t handle these changes, such as certain Sonoff switches.
Try it out if you want to see the difference. Adding more Wi-Fi nodes on your network could worsen the impact of multicast traffic, especially in a mesh setup. Also, avoid using Roaming Assistant on ASUS routers. It adjusts client power levels when devices enter low-power mode, which can lead the router to disconnect the client and reduce connectivity. This is similar to a “disconnect if signal weak” safety feature.