Extreme Networks

Laura4 · ‎02-17-2015

What are the 5Ghz non-DFS, non-overlapping channels?

hsachse · ‎02-17-2015

Like Ronald told you at 300 mbps PHY rate you could assume about 145-150mbps throughput with iperf (udp) for a device like a laptop with a wifi adapter 2x2:2 MIMIO or better. Most tablets only have 1x1:1 MIMO wifi adapter limiting there speed to around 65 mbps throughput.

For more deeper understanding of wifi throughput i would recommend you watching this video and the reading to background pdf:

http://www.wlanpros.com/wi-fi-stress-test-a-vendor-independent-access-point-analysis/

Still waiting for the second round of the wifi stress including the extreme wireless access points.

Ronald_Dvorak · ‎02-17-2015

Yes, that is correct, the medium air is shared with all devices on the same channel.
This is why you shouldn't have more then 1 AP in the same area with the same channel configured as they would share the medium.

Also please keep in mind that it's a half duplex medium so only one client could tx or you have a collision .... like a hub in the good old days.

As a result you'll never see a thruput of 300Mbps on your client... I assume about 150Mbs if you test with iperf (https://iperf.fr/) and more then one stream.

Laura4 · ‎02-17-2015

Thanks for all the info. Since we have the enterasys 3605 APs, there are 2 radios. one is set to g/n 20MHz and one is set to a/n 40MHz. When i get an AP up and running and attach to it, my transmit rate on my MacAir says its 300Mbps. Does that mean I am sharing that 300Mbps with everyone else that is on the same radio as me? I dont actually get 300 Mbps to my self, do I?

Each radio should be transmitting 300Mbps, which is just the connection from the wireless device to the Access Point.

hsachse · ‎02-17-2015

I only now there is one free open source project, but this even require a commercial spectrum analysis adapter. The cheapest solution would be to buy a standalone from a big competitor starting with C of Extreme and use there free available spectrum analyser software.

Another solution for a nice price is Metageek Chanalyzer. Maybe you could rent a spectrum analyzer because interpreting the results is the challenge for most beginners.

Laura4 · ‎02-17-2015

What is a good free spectrum analyzer program? or low cost