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Frequent Contributor I
Posts: 63
Registered: ‎04-16-2010

RF and Roaming Optimization

I'm currently looking through the Aruba RF and Roaming Optimization for Aruba 802.11ac Networks document and while quite a few of the recommdations are straighforward, changing the Min and Max Transmit power is a bit more daunting and more damaging if its configured incorrectly.

 

Currently our environment is HD with AP's in corridors 50 feet apart and elsewhere between 40 - 60 feet apart, at the moment client density is low but we're just in the process of purchasing 500 mobile devices of varying types and are looking at allowing BYOD for employess. We have a mixture of 105 and 205 ap's with 515 in total onsite.

 

I had a look at the power being used on all our AP's and the a radios are 24db with the odd exception being slightly lower and the g radios are 19db again with the exception being slightly lower.

 

I configured an alert on Airwave to send an E-Mail when interference was => 70% and Time Busy was => 50% and since this alert has been implemented were gettting 5 or 6 of these alerts a day from varying AP's, when I've had a look at one of the AP's that's alerted the transmit power is changing every 5 minutes or so.

 

What I would like to know is to resolve these AP alert issues is changing the min and max power the way to go or can I try something else before that?

 

Thanks

 

Jon

 

 

Guru Elite
Posts: 21,289
Registered: ‎03-29-2007

Re: RF and Roaming Optimization

I am assuming you mean the guide here:  http://community.arubanetworks.com/aruba/attachments/aruba/Aruba-VRDs/28/1/RF%20and%20Roaming%20Optimization%20for%20Aruba%20802.11ac%20Networks.pdf

 

The guide mentions - "To efficiently control the RF characteristics of each band and implement the recommendations included in this guide, create separate ARM profiles and assign them to their individual Radio profiles".  Did you do that?  If so, what is your ARM min and max TX for each band?

 

Did you enable "Drop Broadcast and Multicast" for all Virtual APs like the guide mentioned?

 

Did you try "Cutting down the lower rates" like the guide mentioned?

 

 

 



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Frequent Contributor I
Posts: 63
Registered: ‎04-16-2010

Re: RF and Roaming Optimization

Colin

I've cut down the data rates and also dropped broadcast and multicast.

 

At the moment I've only created the two new ARM profiles for each of the radios, I just haven't implemented them yet as I wanted to get some feedback from the community on whether or not this is the next step to possibly resolve the issue I'm seeing.

 

Thanks

 

Jon

Guru Elite
Posts: 21,289
Registered: ‎03-29-2007

Re: RF and Roaming Optimization

jonchill,

 

The ARM transmit power on your access points probably is the biggest factor that determines if you have interference or high utilization.  I would configure that based on the guide.  Please see chapter 4, "RF considerations" about how to do this.

 



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

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