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Occasional Contributor II
Posts: 29
Registered: ‎07-02-2013

different signal strength for SSIDs from same AP

Hi, 

I have a couple of quesitons.

In a campus network where you have different ssids broadcasted from APs why is that some ssid show higher signal stregths compared to other and it keeps changing? 

 

We have a mix of 2.4 & 5 Ghz like normal campus wifi. The SNR threshold is set to 25 which sometime causes performance issues. What is the best threshold level and safest to support voip and video. 

 

Thanks.

MVP
Posts: 4,271
Registered: ‎07-20-2011

Re: different signal strength for SSIDs from same AP

Do you have different data rates assigned on each SSID ?

Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Occasional Contributor II
Posts: 29
Registered: ‎07-02-2013

Re: different signal strength for SSIDs from same AP

No, I don't have data rates assigned. SO it should be same for all. 

MVP
Posts: 4,271
Registered: ‎07-20-2011

Re: different signal strength for SSIDs from same AP

can you please share a screenshot of how each SSID profile configured ?

From the advanced tab
Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Guru Elite
Posts: 21,029
Registered: ‎03-29-2007

Re: different signal strength for SSIDs from same AP


falam wrote:

Hi, 

I have a couple of quesitons.

In a campus network where you have different ssids broadcasted from APs why is that some ssid show higher signal stregths compared to other and it keeps changing? 

 

We have a mix of 2.4 & 5 Ghz like normal campus wifi. The SNR threshold is set to 25 which sometime causes performance issues. What is the best threshold level and safest to support voip and video. 

 

Thanks.


Falam,

 

When you say SNR threshold, which parameter do you mean?  If it is the local probe request threshold in the SSID profile http://www.arubanetworks.com/techdocs/ArubaOS_64_Web_Help/Web_Help_Index.htm#ArubaFrameStyles/VirtualAPs/SSID_Profiles.htm?Highlight=threshold please change that to zero to disable it if you are having problems.

Depending on the application used to measure signal strength you will discover that there are anomalies depending on how the application scans and what frames it uses to report signal strengths.  The most reliable is probably a packet capture tool fixed to the channel that you are concerned about.



Colin Joseph
Aruba Customer Engineering

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