Asynchronous Powerline performance

[Todd Snigg]

I'm trying to make use of a pair of Zyxel PLA5456 AV2000 adapters and I'm getting interesting asynchronous performance. The write/upload is much faster (double) than the read/download. Using LAN Speed Test from Totusoft with both adapters plugged into the same powerstrip I get 230Mbps upload and 107Mbps download, even when I swap the network cables. I've controlled for the other hardware. If I plug directly into the NAS I'm using as the data repository (via a switch)I get 617Mbps upload and 737Mbps download using the same test. Is this normal for powerline adapters?

Thanks.

Todd

 

[degrub]

buffering ?

 

[thiggins]

I'm trying to make use of a pair of Zyxel PLA5456 AV2000 adapters and I'm getting interesting asynchronous performance. The write/upload is much faster (double) than the read/download. Using LAN Speed Test from Totusoft with both adapters plugged into the same powerstrip I get 230Mbps upload and 107Mbps download, even when I swap the network cables. I've controlled for the other hardware. If I plug directly into the NAS I'm using as the data repository (via a switch)I get 617Mbps upload and 737Mbps download using the same test. Is this normal for powerline adapters?

No. That degree of mismatch is not normal. Check our Powerline Charts.

The adapters might be too close together. Try putting them in different outlets in the same room. Also make sure you unplug any power adapters in the vicinity when you are running your tests. USB/cellphone adapters generate a lot of high-frequency noise that will reduce throughput.

 

[Todd Snigg]

Thanks for the feedback. It turns out there is an issue with the Win10 laptop I was using to run the tests. I got suspicious when my chromebook got much better download speeds on speedtest.net. I grabbed a different laptop and sure enough I get similar (and better) upload and download speeds on LAN Speed Test.

 

[Samir]

I have seen this on powerline before too as our 500av nanos have this asymmetrical quality sometimes in iperf tests. We also use lanspeedtest, but mainly to test network drive speeds versus network bandwidth--iperf is much better at that.