OpenWrt support for Linksys MX4200

Maybe you right, but one mx4300 although have 2 gb of ram give me more problems then mx4200 v1. Maybe it is some problem with latest 24.10.5 ath11 driver but on the same spot mx4200 v1 worked more then 2 weeks without reboot. mx4300 give me constant problems. Just one, another is working fine.

Then it’s just a firmware problem. With mx4200v1, it is hardware related, because of RAM limitation. I mean, why did linksys brought out a second version of this router, and the only change was more ram ? Because users were reporting OOM issues, even with linksys firmware.

That is probably true, but that doesnt mean this router is for scrap yard. It is wifi 6 router and can be used. But not if you plan to use it as gateway or server node. Don’t give it too much work and it will work great, especially considering prices.

Edit:

And one more thing. As those routers have ram limitation the probably case is that they were not abused by the previous owners because they will simply crah. I just dismantled my mx4300 and there is burned plastic inside. That is obvious sign that it was pushed beyond limits by previous owner. That why I said to people that they can buy them, use zram and give them light duties and they will work fine. It will not be perfect but for the price on used market, it is very good router.

Oh, they definitely are useful, you just can’t expect fireworks from them. Another problem with mx4200 v1 and v2 and with mx4300 is cooling. They tend to run hot. My units run about 55 to 63 degrees celcius, and that’s now, in the winter. During summer, it’s even worse. They don’t have beefy radiators, like MX5300.

Yes they are. Just like people. If you put the right person on the right place it will do it job perfectly. This is the same with anything else including this linksys mx4200 v1 router.

As cooling goes even my gl-mt6000 is running hot, but it is hot to touch. Not sure if it is designed for or not.

I was thinking for a some time to buy a fan that you can connect to usb port. Aliexpress is full of them and just put it below router, use something to put below fan so it can have enough air to suck in and cool the router. It could be even automated with home assistant.

Yeah, i have gl-mt6000 too. And the annoying thing about it is, that it’s hotter on the bottom. Everytime i’m using it i have to put it on bigger feet, so it runs cooler, but it’s not bad. It can withstand high temperatures.

Probably it can but just to be on a safe side. Buying cooler that can be attached to usb port and put it beneath it would be better solution. The same goes with linksys router. I was checking this things out and i think it could be doable.

Just trigger the fan when router report to home assistant temperature that is above some threshold and turn it off when temp drops.

You made my point. Like I said, why buy all the trouble you listed out with a v1? A v2 with 1 GB of memory or an MX4300 with 2 GB of memory avoids that trouble.

Some users expect their AP’s to be capable of handling multiple VLANs (e.g., lan, guest IOT), many SSID’s (e.g., lan, guest, iot, 2.4 GHz, 5GHz) and a household full of many users and many clients without running out of memory. If that is not you, and you enjoy tinkering and setting up work around fixes and don’t mind the occasional reboot interruption on your network, then by all means enjoy your v1.

I personally think there are better options. I received two MX4200 v1’s with 512 MB of memory from Woot for $15 each shipped, and even at that price, they were too much trouble for me. To each their own.

On the other hand, my Reyee RG E5 AP (MT7622 SoC) with only 256 MB of memory handles multiple VLAN’s many SSID’s and many clients in my home with 52% of its memory free. A second RT3200 AP (also MT7622 SoC) in our home does the same with 512 MB and 62% of its memory free.

Qualcomm units are simply memory hogs, and Linksys did not specify enough of it on the MX4200 v1. That might explain why the v1 was quickly followed by the essentially identical v2 with twice as much memory, and next the essentially identical MX4300 shortly thereafter with twice as much memory again - third time’s the charm.

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And the worst thing is, it continues on newer qualcomm CPUs, ipq50xx suffers from the same problem. I wonder, if the ath12k drivers are the same.

it is very hard to find.

I’m that user and have multiple vlans over 2.4 and 5 ghz radio.

I agree with you, but not on this price level.

The point was there are great router especially considering the price. Just don’t give them heavy lifting. You are for usa and i’m from europe. Price here are a bit higher then in usa for routers. Here you can buy them for 30-50 € that is much more then 15 US.

If you don’t want to use them be my guest, but having multiple vlan ssid doesnt actually mean that every router in your house should and must have multiple vlan ssid.

Unlike your american houses, here house are build out of reinforcement concrete and bricks often with a steel handrail inside and out. And this all are the worst enemy of wifi. That is why house cheap routers can have their place here in eu because they can provide very fast wifi and for heavy vlans and routing there can be used routers that are better for that job.

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Do you have any examples? I run an ipq5018 device, Linksys SPNNX56, as main router, with three VLANs, different SSIDs incl 80211s mesh, adblock, wireguard, dns-over-https, and more on it and it runs perfectly fine.

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On AgustinLorenzo’s NSS builds, after 20 days of uptime on my MX4200 I noticed I was bottlenecked at 60mbps on LAN via librespeed. I rebooted the mesh node and tested via iperf3 and am getting 700-800mbps as expected. Strange, will check again soonā„¢ļø

just to report that i’m running rc1 (haven’t yet updated to rc2) for 6 days.
I had one reboot after one day so changed the logs to persist, nothing since then.
have zram setuped to 128mb, almost not touched, the memory is fluctuating a lot, but no OOMs (at least previously it was stuck when oom, not rebooting)