(Troubleshooting) GL.iNET Flint 2 GL-MT6000 Wi-Fi Issues

I am using OpenWRT 23.05.5 ( Main router) and OpenWRT 23.05.4( GL.iNET Flint 2 GL-MT6000) acting as a Dumb AP to provide Wi-Fi Access to Wi-Fi Clients).

I am using the generic-squashfs-combined-efi.img.gz on the main router and whatever the community package is for the Flint2.

GL.iNET Flint 2 GL-MT6000
https://openwrt.org/toh/gl.inet/gl-mt6000

===

Network setup is as follows...

ISP Fiber Line to Home.
ISP Fiber Line to home to ISP Fiber Modem.
ISP Fiber Modem to Ethernet to Router (eth2 Wan).
Router Ethernet card(eth0,eth1) to Dumb AP(Flint2) with OpenWRT 23.05.4 via Ethernet cable from (eth1 - Main router) to (eth2-Flint2).
Flint2 acts as a dumb AP for Wifi Access.
Client Machines showing the issue are on Wifi connecting to the Flint2 AP.
No issues at all with any of the wired clients.
SQM is off at the moment.

I have confirmed the main router is not the problem, nor is my ISP the issue, and all Ethernet interfaces are working as intended. My issue is entirely caused by the Wireless Systems on the Flint2 not operating properly. I've rebooted the device, multiple times, changes channels for the WiFi bands, rebooted the wi-fi only, etc. If I connect a device via a wire direct, everything works properly, zero issues with a wire. On Wi-Fi however, for some unexplained reason, when just days ago I will getting 700-800 Mbps off WiFi in the 5 GHz range, I am now only getting 23-34 mbps of bandwidth.

The issue I am having is with the Flint2's Wifi Systems and I have no idea what is going on or why I am all of a sudden my wifi traffic is so bandwidth limited with only 2 clients on the Wi-Fi.

==

These were the results of my iperf3 test from a Wi-Fi client, sitting right next to, and I mean right next to as in centimeters away, the Wi-Fi AP.

[x@x ~]$ iperf3 -c 192.168.1.2
Connecting to host 192.168.1.2, port 5201
[  5] local 192.168.1.228 port 53636 connected to 192.168.1.2 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  3.50 MBytes  29.3 Mbits/sec    0    202 KBytes       
[  5]   1.00-2.00   sec  4.12 MBytes  34.6 Mbits/sec    0    358 KBytes       
[  5]   2.00-3.00   sec  3.50 MBytes  29.4 Mbits/sec    0    512 KBytes       
[  5]   3.00-4.00   sec  3.50 MBytes  29.3 Mbits/sec    0    667 KBytes       
[  5]   4.00-5.00   sec  2.75 MBytes  23.1 Mbits/sec    0    789 KBytes       
[  5]   5.00-6.00   sec  2.75 MBytes  23.1 Mbits/sec    0    902 KBytes       
[  5]   6.00-7.00   sec  2.62 MBytes  22.0 Mbits/sec    0   1.02 MBytes       
[  5]   7.00-8.00   sec  2.75 MBytes  23.1 Mbits/sec    0   1.18 MBytes       
[  5]   8.00-9.00   sec  2.75 MBytes  23.1 Mbits/sec    0   1.34 MBytes       
[  5]   9.00-10.00  sec  4.12 MBytes  34.6 Mbits/sec    0   1.49 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  32.4 MBytes  27.2 Mbits/sec    0             sender
[  5]   0.00-10.01  sec  30.1 MBytes  25.2 Mbits/sec                  receiver

iperf Done.
[x@x ~]$ 

As you can see the Flint2's WiFi Bandwidth being provided just isn't where it should be. I should be in the 500Mbps+ range at least and the device is only operating at 34 Mbps at it's best. I can't for the life of me figure out what happened or why I went from the proper bandwidth figures to just 34 Mbps from one day to the next with no changes being made from one day to the next when the issue surfaced.

Power might have gone out but does that cause issues with the AP's file system I need to correct using some command or something?

Please any help would be appreciated before I just give up and reflash the thing. This is the 2nd time this router has exhibited this behvior. It works fine for a few weeks and bam, stuck at 34 Mbps again, forcing me to reflash to fix everything again.

Install latest snapshot release - a lot of Mediatek related fixes are included in this

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Will do, flashing now. Hope I don't have to do this again in 1 week.

An aside note about my upgrade strategy

I have three access points + one router (without wifi)

  • The router runs on a stable release and I only upgrade when no severe issues are reported on the forum within two weeks
  • The access points (EAP615) run on a snapshot release and are refreshed as soon as I see relevant fixes in https://git.openwrt.org/?p=openwrt/openwrt.git;a=summary (although not all at the same time - I refresh one access point to see if it remains stable and if so after two days I refresh the others)
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I upgraded, I still have the same limitations. Stuck at 25-35 mbps.

About to take this wifi router out to shoot it. Piece of junk just doesn't want to work no matter what I do and I didn't do anything to it. It worked one day and then not the next. No changes made or anything. Ugh. So unbelievably frustrating.

I finally got it dude. Thank you for the suggestion for the snapshot builds.

I had to flash it a few times but it works now. Have no idea what happened but I got my bandwidth back and it's thanks to you ed8. Thank you so much man. I was so stressed out by this.

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