Wireless Access

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Frequent Contributor II
Posts: 144
Registered: ‎01-21-2015

How to reduce latency in wireless networks...

Hi folks,

We are facing high latency in wireless network.

When I am pinging Controller from client/ gateway its 50-60 ms.

However I enabled BC/MC optimization, Lower data rates- disabled, Band steering enabled.

 

any suggestion how to reduce it ???

 

 

rana
Aruba Employee
Posts: 571
Registered: ‎04-17-2009

Re: How to reduce latency in wireless networks...

Could be co-channel interference. Check your channel Busy times with the following command:

 

show ap debug radio-stats ap-name Home-225 radio 1 advanced | include Busy

 

Where Home-225 is your AP Name and radio 1 is 2.4Ghz radio. If you want to check the 5Ghz, use radio 0.

Thanks,

Zach Jennings
Frequent Contributor II
Posts: 144
Registered: ‎01-21-2015

Re: How to reduce latency in wireless networks...

[ Edited ]

Thanks ,

I can confirm you that Co-channel interface is not there.

We are running 200 AP-215 and in dashboard its showing only 2 or 3 radio in red colour under Channel Busy.

However we are getting this latency all over the campus.

Also if co-channel interface is there what changes needs to be done ??

rana
Guru Elite
Posts: 21,294
Registered: ‎03-29-2007

Re: How to reduce latency in wireless networks...

Rana,

 

Why don't you tell us what you already checked, so we do not suggest it? There is a long list of things that we can check; please help us save you some time.

 



Colin Joseph
Aruba Customer Engineering

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

MVP
Posts: 4,301
Registered: ‎07-20-2011

Re: How to reduce latency in wireless networks...

Do you have Drop broadcast / multicast enabled on the VAP ?
Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Frequent Contributor II
Posts: 144
Registered: ‎01-21-2015

Re: How to reduce latency in wireless networks...

Sorry Colin,

The followings I did to minimize the latency.

1. Enabled BC/MC in VAP.

2. Disbled lower data rates for A and G radio SSID.

3. Enabled band steering on all VAPs

 

rana
Guru Elite
Posts: 21,294
Registered: ‎03-29-2007

Re: How to reduce latency in wireless networks...

Like Vfabien said, you also need to enable "Drop Broadcast and Unknown Multicast" in all of your VAPs.  BCMC in the VAP is something different.

 

Also, 50 milliseconds is about average for a shared media like wireless.  It is not a cause for real concern.  Wireless VOIP can operate under those conditions, and that is the most latency sensitive application out there.

 



Colin Joseph
Aruba Customer Engineering

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

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