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Very slow data rate / throughput on wireless Aruba access points, RADIUS authenticated.

Posted on 2016-09-07
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Last Modified: 2016-10-09
Hello Experts,

We have 13 access points from Aruba (model number 225) and Aruba controller (model 7010).

We have a corporate SSID which is published only to domain-joined laptops via GPO. Then its also RADIUS authenticated.

We also have a Guest SSID which is broadcasted normally and secured with a WPA key.

All the APs and the laptops are fairly new and support 802.11 ac 40MHz

The Corporate internet line is separate 100Mbps
The Guest internet line is separate 100Mbps

When I connect to the guest internet via wifi, I am getting speeds of up to 75Mbps when users are connected.
When I connect to the corporate internet via wifi I am getting speeds of only up to 7Mbps when users are connected.
When I connect to the corporate internet via LAN, just to check, I am getting speeds of up to 60Mbps.

I also tried to connect a cable directly to the Aruba controller and tried the speeds and its good @ 65 to 75 Mbps.

I checked on the Aruba controller dashboard and was surprised to see that all the corporate clients are connected to n 40 Mhz even if the AP is broadcasting ac 40Mhz.

Please if someone could assist?

Thanks
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Question by:Falcon IT
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Author Comment

by:Falcon IT
ID: 41787732
Additionally, please let me know if you need any screenshots..
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Expert Comment

by:gheist
ID: 41789074
Can you state the problem?
You are just describing how WiFi works so far.
75Mbps is common WiFi-N rate (very few chips support MIMO and 40GHz, or 5GHz band) and if you have many clients it should not come as big surprise that they share bandwidth?
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Author Comment

by:Falcon IT
ID: 41789150
Apologies gheist,

In the above, the problem is "When I connect to the corporate internet via wifi I am getting speeds of only up to 7Mbps when users are connected."

Hope you got it.
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Expert Comment

by:gheist
ID: 41789923
65 to 75 could be interface speed:
https://en.wikipedia.org/wiki/IEEE_802.11
7mbps is realistic transfer rate in a multi-tenant wifi
Are you suere you compare apples to apples?
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Author Comment

by:Falcon IT
ID: 41796320
Not sure if you got it..

The wireless AP supports 802.11 ac, which supports speeds of upto 1300 Mbps. Given that there might be some interference etc, i agree we cannot expect that speed.

Also the internet line from the ISP is 100Mbps, so the speed should be atleast 75 Mbps during a normal day.

If one SSID works without RADIUS at good speed, why does the other doesnt work?

Everything is the same, the only different is the RADIUS auth for corporate wifi.
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Accepted Solution

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gheist earned 500 total points (awarded by participants)
ID: 41807256
Radius does not authenticate each packet.
Can you try netalyzer.icsi.berkeley.edu in both configs? Sometimes solution is very simple omission.
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Expert Comment

by:gheist
ID: 41835690
No diagnostics attempted
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