Question Changed router, now the powerline adapter does not work ?

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Jan 20, 2025
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I use a powerline adapter in order to use my PC and I recently upgraded my speed via Spectrem. Due to this they sent me a new modem and router and after setting it up and activating them, the powerline adapter gets little to no speed. Before the change I would get around 90 mbs if I did and speed test and now I am getting 8. The internet itself is faster as I have tested it on my laptop. I have reset the powerline adapters multiple times, changed outlets, tried all available ethernet ports on the back of the router, all to no improvement. The adapter is a TP-Link AV2000 and the router is whatever the router is that Spectrum gives you, Model: SAX2V1S.
 
The problem with wifi has nothing to do with the packet size really. The problem is if the packet is received with error the wifi radios request the data be retransmitted. It actually will attempt retransmission multiple times if needed. This can cause spikes over 100ms. Something like ethernet just drops the packet and the application level protocol like TCP will do the request for data retransmission.

For most application having the wifi do the retransmission is more efficient. Online games are the key exception.

The problem is games most times are already using UDP for their data transmission. They do not care about data retranmission. By the time the data would be retransmitted it is already out of date. So wifi is recovering lost data that has no value to a game.

It depends on what you are calling a CPU in a router. This gets messy because they sometime put the wifi radio and the cpu on the same silcon but they still function as 2 independent units. Years ago companies like HP or cisco used to make wifi radio chips. Now days there are 3 big companies that make the wifi chips like broadcom or mediatek.

What you find is there are 2 basic OS running. The one that ones on the main cpu is different depending on who makes the router. So asus and tplink etc are different even though they are all based on some form on linux distribution. The second OS is the one that does all the important work on the wifi chip. This software is provided by the wifi chipset vendor in a binary form kinda like a driver. The main OS loads this binary file into the wifi chip. The main router OS has very limited ability to affect the wifi data. This is mostly to make it easier for each manufacture and not have to their own FCC certifications. Used to be you could do all kinds of fun stuff like change the channels and power output to values that were not legal.

If you want to see this look at asus open source code they run on most their routers. All the important wifi functions are not in the actual code.
What this basically means is all devices that use the same wifi chip will perform identically at least wifi wise since the firmware is provided by the maker of the chipset no mater which manufacture makes teh router.
 
I use a powerline adapter in order to use my PC and I recently upgraded my speed via Spectrem. Due to this they sent me a new modem and router and after setting it up and activating them, the powerline adapter gets little to no speed. Before the change I would get around 90 mbs if I did and speed test and now I am getting 8. The internet itself is faster as I have tested it on my laptop. I have reset the powerline adapters multiple times, changed outlets, tried all available ethernet ports on the back of the router, all to no improvement. The adapter is a TP-Link AV2000 and the router is whatever the router is that Spectrum gives you, Model: SAX2V1S.
Take the router you had before, log into it and disable dhcp. Then connect one of its lan ports to the new router and plug the power line adaptor into another lan port on the old router. If it works just as good as before changing the router, then you've fixed it by establishing the isolated ground ethernet line. Because there are two types of grounding schemes and only one is compatible to ac line network adaptors. The other factor that could be in play is the ac adaptor on the new unit. If the old unit is the same voltage, try that adaptor. Because it might be that as well.
 
Take the router you had before, log into it and disable dhcp. Then connect one of its lan ports to the new router and plug the power line adaptor into another lan port on the old router. If it works just as good as before changing the router, then you've fixed it by establishing the isolated ground ethernet line. Because there are two types of grounding schemes and only one is compatible to ac line network adaptors. The other factor that could be in play is the ac adaptor on the new unit. If the old unit is the same voltage, try that adaptor. Because it might be that as well.
More techno bull crap. Show me the technical document that show any connection to ground on a ethernet cable. You will find many diagrams of the isolation chips that are used for ethernet. You likely never have read the IEEE standard for ethernet..where I have in detail. It clearly shows that ethenet is magnetically isolated from the equipment on both ends. Maybe you don't understand what magnetic isolation means.

Now that YOU are back on topic and not suggesting to use wifi mesh systems you pretty much just recommended what I did in my first post except I said to use a small switch.

It has to be something much more simple like the ethernet cable he is using is bad in some way or much more likely it is a fake ethernet cable that does not meet the standards. Some equipment does not tolerate out of spec cables.