Wireless Access

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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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How to reduce latency in wireless networks...

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  • 1.  How to reduce latency in wireless networks...

    Posted May 19, 2015 10:18 AM

    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 ???

     

     



  • 2.  RE: How to reduce latency in wireless networks...

    EMPLOYEE
    Posted May 19, 2015 10:23 AM

    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.



  • 3.  RE: How to reduce latency in wireless networks...

    Posted May 19, 2015 10:55 AM

    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 ??



  • 4.  RE: How to reduce latency in wireless networks...

    EMPLOYEE
    Posted May 19, 2015 11:00 AM

    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.

     



  • 5.  RE: How to reduce latency in wireless networks...

    Posted May 19, 2015 11:12 AM
    Do you have Drop broadcast / multicast enabled on the VAP ?


  • 6.  RE: How to reduce latency in wireless networks...

    Posted May 19, 2015 11:56 AM

    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

     



  • 7.  RE: How to reduce latency in wireless networks...

    EMPLOYEE
    Posted May 19, 2015 11:58 AM

    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.