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Severe stability issues on my local network (lemmy.dbzer0.com)

submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]

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Hello Hivemind 🙃

i need some advice here as i am losing my mind.

I have a Fritz!Box6591 and 1Gbit/s internet. Now since yesterday my complete network is extremely unstable. IF i can get any connection, it's as fast as it should be. But connections break down within minutes.

If i let the network "rest" for a couple minutes with barely no activity, i can then access everything perfectly fine for a few minutes until everything breaks down again.

What i did:

-Deactivated my local DNS (AdGuard) on my router -Restarted (even with 15 min. of no power) EVERYTHING. Literally everything in my homenetwork.

Since it's not only the internet connection and not one specific device and not even one specific type of connection (two WiFi Devices can't properly connect between each other just as two different LAN Devices on either different Ports on the router or same router port on a switch) i don't really know what to do anymore.

Obviously my router is the only common denominator but i can't see any issues with it. It's not overheating, it's RAM & CPU usage is perfectly fine, it's not gone it powersaving mode, it doesn't throw me any errors.

I already did tracepath's to every device and there is no unexpected hop on some theoretical phantom device (if my DNS became buggy or something).

If i ping one of my servers from my PC. It says i have a latency of 1~3ms but it is obviously hanging really hard. It could have a delay of 15 seconds before the next line in ping appears but that will still claim it had a 2ms latency.

I don't know what to do anymore and where to begin. Any ideas?

EDIT: Here is quick sketch of my network

EDIT2: Found the culprit - https://lemmy.dbzer0.com/comment/324192

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[–] beaumains 1 points 2 years ago

Yo, I have also been having problems with a fritzbox 7490. I initially thought it was the cat6e in the walls but we're having wifi issues as well. Perhaps the devices they built are starting to fail? Flash getting old, capacitors getting swollen etc. I'm hanging out for a microtik replacement just needs approval from the minister of finance.