Suddenly very big speed difference between LAN, and my WIFI access point

Started by rmf01, March 30, 2025, 08:51:38 PM

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Hello OPNsense Community!

I'm posting here, for help since I couldn't really find my answers... My Problem is the following:

Randomly, my AP's speed suddenly went down really bad.. I've read some similar topics here, but there, I couldn't really find the solution I've been looking for, since many post said like "it's obviously the AP's problem, not OPNsense related" and so on... I could accept it, but the fact, that it was good before, and had a decent speed, and now it's slow...

Anyways, too much talking... I'm new, to posting here, but I'll try to write as many infos about my setup, that I could think of, that can help here...+ I'll upload here my LAN speed test and my Speedtest on connected wireless to my AP..

I'm connected to my AP with 6Ghz, and relatively not far away.. there are only 1 SSID not near here, so that can't be an issue suddenly..

My AP's info is the following:

TP-Link Deco XE200

-it's WIFI 6E
-has 10GBs eth port on it
-Can do the following speed
   2,5GHZ - 1148 Mbps
   5GHZ - 4804 Mbps
   6GHZ - 4804 Mbps
So in total, around 10,8 Gpbs

I'll link it's page here: ( https://www.tp-link.com/hu/home-networking/deco/deco-xe200/ )


My Speedtest on LAN was the following:

Download - 1504Mbps
Upload - 290Mbps

My Speedtest on the Acces Point at 6Ghz was the following:

Download - 94Mbps
Upload - 93,8 Mbps

That device is end of life on the US website...

The fact that the eth port is 10Gb capable does not mean that it's effectively running at that speed.
You should be able to check that on either end. Maybe even light indicators.
Swap cables. Test between 2 machines on your LAN. Test from a machine directly wired to OPN.
Process of elimination...

EricPerl is correct.  First thing I noticed in your post is that it looks as one of the devices has their NIC negotiating at 100Mb speed.  Check the cabling and reboot (power off/on) both devices.