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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Problem with dell 1704 802.11b/g/n (2.4GHz)

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  • 1.  Problem with dell 1704 802.11b/g/n (2.4GHz)

    Posted May 23, 2018 03:08 AM

    Hi,

     

    I have a problem thats really driving me crazy!

     

    We recently implemented IAP 315 (Firmware Version:

    6.5.2.0) campus wide wifi solution, high density deployment (30-40 feet per AP), since we have about 250 users inside this facility. 

     

    I do not have any issues with the latest AC adapters, 5GHz works fine. 

     

    The problem is we have about 40-50 old laptops with Dell 1704 802.11b/g/n (2.4GHz) adapters (Broadcom, driver version 6.30.223.228). These laptops are mix of Windows 7 and Ubuntu 14.04 OS. 

     

    When I connect to the SSID, it connect perfectly, but the client keeps hopping AP. For example, if there are APs A, B, C in this location, it keeps going back and forth from A to B to C and back to A every 30 seconds. Due to this the connection is not stable at all.

     

    I tried setting the min transmit power to 6 max transmit power to 12 to reduce the coverage, but to no use. Bandwidth steering mode to "Preferred access" and also to "Fair Access", nothing helped. I fiddled a lot with these settings.

     

    I started troubleshooting from the Dell 1704 adapter side. I forced the adapter settings to G mode (BSS mode - 802.11g Mode"

     

    Below are my adapter settings:

     

    802.11H loose 11h
    Antenna diversity - AUX (originally auto)
    AP Compatibility mode - Higher performance
    arp offload - Enabled
    Bandwidth capapcity - 11b/g:20/40 MHz
    Bluetooth collaboration - Auto
    BSS mode - 802.11g Mode
    BT-Amp - Disabled
    Fragmentation Threshold - 2346
    IBSS 54g(tm) protection mode - Auto
    IBSS mode - 802.11b/g/n auto
    Locally administered MAC - Not present
    Minimum power consumption - Enabled
    NS Offload - Enabled
    PLCP header - Auto (short/long)
    priority & VLAN - priority & VLAN disabled
    Rate (802.11b/g) - Best rate
    Roam tendency - Moderate
    Roaming decision - Default
    RTS Threshold - 2347
    Wake on magic packet - enabled
    Wake on pattern match - Enabled
    WiFi rekeying offload - Enabled
    WMM - Disabled
    WZC IBSS Channel Number - 11(20MHZ)
    Xpress (TM) Technology - Disabled

     

    but still the AP keeps switching. 

     

    I tried with fresh install of Windows 7, Windows 10 OS also. The same behaviour with all the OSs.

     

    I called logged with HP, but was not of much help. 

     

    Authentication - Radius (windows 2016)

    WPA2-Enterprise (AES)

    We use VLAN tagging for SSIDs and have 7 different SSIDs for different VLANs

     

    Anyone came across such issue and solved it? Please help.