I posted a topic about my phone disconnecting frequently in ethernet but I ve just discovered that the internet on my PC, also by ethernet cable, was divided by 3. (the test was done by connecting the PC directly to the ISP's box and speedtest.net)
Firmware 4.7.2 but I guess it is the same problem with 4.3.21. 4.3.24
Provided you don't have any wired network issues (bad cables, wrong NIC interface settings, network loops, duplicate names etc), other features like AdGuard filters, DNS configuration etc that consume additional resources or routing rules can affect speed.
When I troubleshoot, I always start with the basics and disable all optional features to get a baseline.
Do you have any custom settings or features enabled?
EDIT - I looked through your earlier thread and it does seem like you've got a somewhat complicated setup... Plenty of variables to check. Also, you mention that you are using your ISP's box in your setup as both modem and bridge relaying to your Opal? I am not familiar with UK internet providers, but in the US they are not known for providing the best devices that plays nice with 3rd party equipment...
EDIT 2 - If I understand correctly, your Opal is in Bridge Mode with your ISP's box as the source. I would enable WiFi on the ISP box and test speed from that connection while standing in the same location that the Opal is placed. I would want to confirm that the Opal itself can get good speed from the ISP box. Because if it has trouble there, obviously everything else downstream will suffer as well.
I did a hard reset yesterday, and then I only did three things once I set the password:
Disable Wi-Fi
Add 9.9.9.9 as DNS
Enable anti-DNS rebinding
Then I use the same cable for testing and non-testing, cat 5 cable but it was also the same with a cat 8 that I tested, and you should know that this assembly gave me all the speed before so if it comes from the box you would have to imagine that it recently started to mismanage the router whereas before it was going very well.
The box in bridge mode doesn't have Wi-Fi, I think. I didn't understand, do you want to connect the box to the router via Wi-Fi? Because I don't have a Wi-Fi card on the PC side.
Typically, 'Bridge Mode' refers to bridging two devices together via a WiFi connection. So your ISP box would send out WiFi and your Opal would take that WiFi signal and turn it back into a wired network like a 'backwards' AP. You can connect them via ethernet cable, but either way, Bridge Mode disables all the routing logic and other features and basically turns your Opal into a basic ethernet switch. I'm guessing there must be more to it than that, otherwise why use a router for such a simple task?
Again, I am not familiar with UK ISP's. But if your ISP box is still doing the routing then what I think you may want is the Drop-In Gateway feature instead.
So, my internet stays divided by 3 and it s normal ?
Notice that when I set the routeur on bridge mode, my internet is back with full speed... what proves it is not cables, connections, computer, speedtest in cause...
Trying to understand your different setups. But I'm still confused.
Setup 1: ISP box -ethernet- PC => full speed 500Mbps
Setup2 : ISP box - ethernet to OPAL WAN - OPAL in repeater mode - OPAL LAN - ethernet - PC => speed 140Mbps
OPAL is in Network mode router, access point or extender and has 2 clients : PC via ethernet LAN, and phone via wifi (I assume this , or does phone also have ethernet?)
I assume "Network mode = extender", because the OPAL has no "Network mode = bridge"
"Extender" and "Access point" are similar to "bridge", but not exactly the same as "bridge".
The "repeater" itself (wifi uplink) is NOT used in your setup.
If you want pure bridge function, then a tweak is needed for the OPAL.
Start from network mode "router" (convenient for access from PC)
Disable the DHCP server on the LAN side (Set interface IP as a static client IP address in the ISP-box range only for later admin access)
The 2 LAN ethernet ports are in the same switch VLAN eth0.1 and are bridged via the LAN-bridge with both Home wifi radio's wlan0 and wlan1 (Not the Guest wifi, and for sure not the WAN ethernet)
This tweak (=stop DHCP server) and using a LAN ethernet port as uplink, makes the OPAL just a switched/bridged ethernet-wifi converter.
Oooh well, this might be very close to the Network mode = access point, but this mode uses the WAN ethernet port AFAIK.
Anyway I get pure bridge function because I have my internet speed back at 500
And more of this, if doubts, it stops the connection on my PC and so I must create a new connection for the ISPs box... and then I lose all access to the Web interface, and there is even a special way to restore the Router Mode with the reset button.
So all that is specific of a bridge mode.
To be clearer, the setup used to get back 500 Mbps and of which I am talking here was
ISP's Box > ethernet > WAN OPAL (Bridged) > LAN OPAL > ethernet > PC
NB : my phone is also connected to opal by ethernet and an USB-A adapter + an OTG adapter.