5 ms·

I get pretty much 80-85% of the advertised speed on my TPLink AV1300 just over 1 gig.

Symbiote 7y ago
With the same equipment, I get 30Mbit/s with the most convenient pair of sockets, and 90Mbit/s with a different pair. The apartment was completely rewired in 2015.
deleted 7y ago
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Thriptic 7y ago
I would say performance is so contingent on wiring quality that it cannot be reasonably assured. I tried out a TPLink system that claimed to be able to deliver 300 mb/sec and only managed 10. The fundamental problem is that you tend to want to place the units in areas with the highest potential for noise (eg near lots of electronics).
- luma 7y ago
  Your experience is typical even in the cleanest of AC power conditions. Powerline is hilariously oversold and regularly provides less than 25% of the advertised throughput. This blogger has some great examples: https://specklepattern.wordpress.com/2018/03/03/seven-generations-of-homeplug-powerline-adapters-compared/ https://specklepattern.wordpress.com/2018/03/03/seven-genera... The "2 gigabit" adapters top out at 470mbit when both sides are plugged into the same duplex receptacle. That number is cut in half when you move to another room, and it gets worse from there. Every Powerline vendor, without exception, are using funny math when coming up with their advertised throughput numbers. In no situation will they ever be able to provide 50% of their stated throughput, and more typically it's closer to 10%.
  - Nextgrid 7y ago
    In this case I should consider myself lucky. I'm getting ~300Mbps out of "AV1200" adapters.
  - kortex 7y ago
    They probably go to the Shop Vacuum Power Rating school of specs. Oh you hit 40A of inrush current for 30 ms? 4500W, call it 6 HP. They probably hit 2 gbps for 30ms on the same duplex with zero interference.
- deleted 7y ago
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luma 7y ago
Can you give some details on the test methodology used? You are more than doubling the throughput of any publicly-posted performance tests I've seen. If your tests show > 1gbit of throughput on a device which has a 1gbit port, something isn't adding up.
- pstrateman 7y ago
  Some of those devices have multiple Ethernet ports which can be bonded.
- dogma1138 7y ago
  The speed between the Ethernet over powerline nodes is independent of the Ethernet connection of the devices connected to them. You can see the link speed between the nodes in the TPlink app. They also support LAG, I have two of the 3 ports LAGed to a Switch. From what I can tell the biggest issue with these other than the wiring/noise issues is if people rely on them as a switch. I used to have 3 devices connected to them (AP, TV and Xbox) switching to LAG and a proper 1gbe TPlink switch that ironically costs more than the homeplug more or less solved my issues but ymmv. I also think that the UK residential power wiring that uses ring circuits might be better for homeplug usecases than other curicut types.
  - Nextgrid 7y ago
    Oh, so you're talking about the speed the adapter tells you. In my experience those speeds are about 2x what you'd get in reality over a TCP connection (using something like iperf3). If you have time, could you run iperf3 (brew/apt install iperf3) between two computers separated by the powerline devices?

With the same equipment, I get 30Mbit/s with the most convenient pair of sockets, and 90Mbit/s with a different pair. The apartment was completely rewired in 2015.

deleted 7y ago

[deleted]

Thriptic 7y ago

I would say performance is so contingent on wiring quality that it cannot be reasonably assured. I tried out a TPLink system that claimed to be able to deliver 300 mb/sec and only managed 10. The fundamental problem is that you tend to want to place the units in areas with the highest potential for noise (eg near lots of electronics).

luma 7y ago
Your experience is typical even in the cleanest of AC power conditions. Powerline is hilariously oversold and regularly provides less than 25% of the advertised throughput. This blogger has some great examples: https://specklepattern.wordpress.com/2018/03/03/seven-generations-of-homeplug-powerline-adapters-compared/ https://specklepattern.wordpress.com/2018/03/03/seven-genera... The "2 gigabit" adapters top out at 470mbit when both sides are plugged into the same duplex receptacle. That number is cut in half when you move to another room, and it gets worse from there. Every Powerline vendor, without exception, are using funny math when coming up with their advertised throughput numbers. In no situation will they ever be able to provide 50% of their stated throughput, and more typically it's closer to 10%.
- Nextgrid 7y ago
  In this case I should consider myself lucky. I'm getting ~300Mbps out of "AV1200" adapters.
- kortex 7y ago
  They probably go to the Shop Vacuum Power Rating school of specs. Oh you hit 40A of inrush current for 30 ms? 4500W, call it 6 HP. They probably hit 2 gbps for 30ms on the same duplex with zero interference.
deleted 7y ago
[deleted]

luma 7y ago

Can you give some details on the test methodology used? You are more than doubling the throughput of any publicly-posted performance tests I've seen. If your tests show > 1gbit of throughput on a device which has a 1gbit port, something isn't adding up.

pstrateman 7y ago
Some of those devices have multiple Ethernet ports which can be bonded.
dogma1138 7y ago
The speed between the Ethernet over powerline nodes is independent of the Ethernet connection of the devices connected to them. You can see the link speed between the nodes in the TPlink app. They also support LAG, I have two of the 3 ports LAGed to a Switch. From what I can tell the biggest issue with these other than the wiring/noise issues is if people rely on them as a switch. I used to have 3 devices connected to them (AP, TV and Xbox) switching to LAG and a proper 1gbe TPlink switch that ironically costs more than the homeplug more or less solved my issues but ymmv. I also think that the UK residential power wiring that uses ring circuits might be better for homeplug usecases than other curicut types.
- Nextgrid 7y ago
  Oh, so you're talking about the speed the adapter tells you. In my experience those speeds are about 2x what you'd get in reality over a TCP connection (using something like iperf3). If you have time, could you run iperf3 (brew/apt install iperf3) between two computers separated by the powerline devices?