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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Client connection problem

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  • 1.  Client connection problem

    Posted Aug 19, 2015 09:39 AM

    Hi all

    Ramdomly users complaint, connection dropped. I search logs on controllers as below. What can be cause of this issue ?

     

    Regards

     

     

     decreasing... cov-index 7/0 tx-power 7 new_rra 1/6
    Jul 30 09:45:14  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 5 new_rra 11/4
    Jul 30 09:49:20  sapd[702]: <404075> <WARN> |AP IT.WAP.ARB93.SNG-201@172.28.3.106 sapd|  AM 00:24:6c:3e:e4:60: ARM - decreasing power cov-index 12/1 tx-power 6 new_rra 11/4
    Jul 30 09:52:57  sapd[724]: <404075> <WARN> |AP IT.WAP.ARB105.SNG-301@172.28.3.105 sapd|  AM 6c:f3:7f:2c:39:f0: ARM - decreasing power cov-index 14/0 tx-power 8 new_rra 11/6
    Jul 30 10:08:11  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 5 new_rra 11/4
    Jul 30 10:09:48  sapd[724]: <404075> <WARN> |AP IT.WAP.ARB105.SNG-301@172.28.3.105 sapd|  AM 6c:f3:7f:2c:39:f0: ARM - decreasing power cov-index 12/0 tx-power 6 new_rra 11/5
    Jul 30 10:26:53  sapd[702]: <404075> <WARN> |AP IT.WAP.ARB93.SNG-201@172.28.3.106 sapd|  AM 00:24:6c:3e:e4:60: ARM - decreasing power cov-index 11/1 tx-power 6 new_rra 11/5
    Jul 30 10:41:40  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 13/0 tx-power 5 new_rra 11/4
    Jul 30 12:13:50  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 5 new_rra 11/4
    Jul 30 12:44:25  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 5 new_rra 11/4
    Jul 30 13:15:25  sapd[702]: <404075> <WARN> |AP IT.WAP.ARB93.SNG-201@172.28.3.106 sapd|  AM 00:24:6c:3e:e4:60: ARM - decreasing power cov-index 11/1 tx-power 6 new_rra 11/5
    Jul 30 13:54:56  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 5 new_rra 11/4
    Jul 30 13:59:20  sapd[702]: <404075> <WARN> |AP IT.WAP.ARB93.SNG-201@172.28.3.106 sapd|  AM 00:24:6c:3e:e4:60: ARM - decreasing power cov-index 11/1 tx-power 5 new_rra 11/4
    Jul 30 15:09:50  sapd[702]: <404075> <WARN> |AP IT.WAP.ARB93.SNG-201@172.28.3.106 sapd|  AM 00:24:6c:3e:e4:60: ARM - decreasing power cov-index 11/1 tx-power 5 new_rra 11/4
    Jul 30 15:09:52  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 5 new_rra 11/4
    Jul 30 15:38:56  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 5 new_rra 11/4
    Jul 30 16:26:59  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 8 new_rra 6/7
    Jul 30 16:38:29  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 14/0 tx-power 7 new_rra 11/5
    Jul 30 17:54:06  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 14/0 tx-power 8 new_rra 11/6
    Jul 30 18:06:10  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 12/0 tx-power 6 new_rra 11/5
    Jul 30 18:26:08  sapd[723]: <404075> <WARN> |AP IT.WAP.ARB105.PLT-601@172.28.3.95 sapd|  AM d8:c7:c8:a8:ad:50: ARM - decreasing power cov-index 14/0 tx-power 7 new_rra 11/5
    Jul 30 18:52:10  sapd[724]: <404075> <WARN> |AP IT.WAP.ARB105.SNG-301@172.28.3.105 sapd|  AM 6c:f3:7f:2c:39:f0: ARM - decreasing power cov-index 13/0 tx-power 8 new_rra 11/6



  • 2.  RE: Client connection problem

    EMPLOYEE
    Posted Aug 19, 2015 07:26 PM
    That just shows The access point is increasing and lowering power. Typically that does not disconnect a client. What is the output of "show AP radio-stats"


  • 3.  RE: Client connection problem

    Posted Aug 20, 2015 01:20 AM

    Hi Colin

    The situation as below. Most of complaint comes from this AP --> "IT.WAP.ARB105.PLT-501 "

     

    (IT.WAC.ARB650.PLT-ARB1) #show ap radio-?    
    radio-database          Show radio information for access points this switch
                            knows about
    radio-summary           Show AP radios currently registered on this switch

    (IT.WAC.ARB650.PLT-ARB1) #show ap radio-summary

    APs Radios information
    ----------------------
    Name                    Group           AP Type  IP Address    Band  Mode         EIRP/MaxEIRP  NF/U/I     TD            TM                 TC
    ----                    -----           -------  ----------    ----  ----         ------------  ------     --            --                 --
    IT.WAP.ARB105.PLT-501   3.Kat_AP_Group  105      172.28.3.97   2.4   AP:HT:1      21/22         -96/38/8   8/5/0/1/0/1   9/9/11/11/11/10    2/1/0/1/0/1
    IT.WAP.ARB105.PLT-501   3.Kat_AP_Group  105      172.28.3.97   5     AP:HT:161-   24/24         -93/1/0    0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB125.PLT-402   3.Kat_AP_Group  125      172.28.3.109  2.4   AP:HT:1      20.5/20.5     -91/40/3   0/0/0/0/0/0   16/15/15/15/17/16  4/1/0/0/0/0
    IT.WAP.ARB125.PLT-402   3.Kat_AP_Group  125      172.28.3.109  5     AP:HT:48-    20/20         -88/2/1    0/0/0/7/0/0   0/0/0/0/0/0        0/0/0/1/0/0
    IT.WAP.ARB93.PLT-B102   3.Kat_AP_Group  93       172.28.3.102  2.4   AP:HT:6      20/20         -96/17/2   2/11/2/1/6/4  2/3/2/2/2/2        0/2/0/0/1/0
    IT.WAP.ARB125.PLT-202   3.Kat_AP_Group  125      172.28.3.100  2.4   AP:HT:11     18/20.5       -92/68/11  7/5/2/6/5/11  11/12/12/10/12/10  16/19/19/20/19/20
    IT.WAP.ARB125.PLT-202   3.Kat_AP_Group  125      172.28.3.100  5     AP:HT:44+    20/20         -89/2/1    1/0/1/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB93.PLT-B101   3.Kat_AP_Group  93       172.28.3.101  2.4   AP:HT:11     16/16         -96/21/5   2/1/0/0/0/4   4/5/4/5/4/3        0/0/0/0/0/0
    IT.WAP.ARB105.PLT-A101  3.Kat_AP_Group  125      172.28.3.113  2.4   AP:HT:6      20.5/20.5     -90/13/2   0/0/0/0/0/0   7/6/6/5/7/6        0/0/0/0/0/0
    IT.WAP.ARB105.PLT-A101  3.Kat_AP_Group  125      172.28.3.113  5     AP:HT:153-   17/17         -93/2/2    0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB205.PLT-301   3.Kat_AP_Group  205      172.28.3.104  2.4   AP:HT:11     22/22         -95/62/8   0/0/0/0/0/0   2/2/4/4/8/5        10/22/20/21/20/22
    IT.WAP.ARB205.PLT-301   3.Kat_AP_Group  205      172.28.3.104  5     AP:VHT:149E  24/24         -97/0/0    0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB93.PLT-B301   3.Kat_AP_Group  93       172.28.3.99   2.4   AP:HT:1      17/17         -93/37/30  0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB105.PLT-401   3.Kat_AP_Group  105      172.28.3.108  2.4   AP:HT:6      22/22.5       -95/57/4   3/0/0/0/0/1   22/15/30/26/26/30  0/0/1/1/3/0
    IT.WAP.ARB105.PLT-401   3.Kat_AP_Group  105      172.28.3.108  5     AP:HT:149+   23/23         -93/8/1    0/4/0/2/0/3   0/0/0/0/0/0        0/1/0/1/0/1
    IT.WAP.ARB105.SNG-301   3.Kat_AP_Group  105      172.28.3.105  2.4   AP:HT:11     22/22         -94/21/4   0/0/0/0/0/0   8/8/7/7/11/11      0/0/0/0/0/0
    IT.WAP.ARB105.SNG-301   3.Kat_AP_Group  105      172.28.3.105  5     AP:HT:44+    22/22         -93/2/1    1/3/0/1/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB205.PLT-702   3.Kat_AP_Group  205      172.28.3.112  2.4   AP:HT:1      22/22         -97/18/4   0/0/0/0/0/0   6/7/7/6/6/7        0/0/0/0/0/0
    IT.WAP.ARB205.PLT-702   3.Kat_AP_Group  205      172.28.3.112  5     AP:VHT:149E  24/24         -97/3/1    0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB93.SNG-201    3.Kat_AP_Group  93       172.28.3.106  2.4   AP:HT:1      17/17         -96/43/4   1/14/1/1/1/3  3/3/2/2/3/3        25/30/19/23/21/26
    IT.WAP.ARB105.PLT-601   3.Kat_AP_Group  105      172.28.3.95   2.4   AP:HT:11     21/22         -96/20/2   0/0/0/0/0/0   5/5/6/5/6/6        0/0/0/0/0/0
    IT.WAP.ARB105.PLT-601   3.Kat_AP_Group  105      172.28.3.95   5     AP:HT:161-   24/24         -93/1/0    0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
    IT.WAP.ARB105.PLT-101   3.Kat_AP_Group  105      172.28.3.93   2.4   AP:HT:6      22/22.5       -87/10/4   0/0/0/0/0/0   0/0/0/0/0/1        0/0/0/0/0/0
    IT.WAP.ARB105.PLT-101   3.Kat_AP_Group  105      172.28.3.93   5     AP:HT:153-   23/23         -93/0/0    0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0
                                                      

    NF: Noise Floor(dBm); U: Utilization(%); I: Interference(%)
    Mode: HT or VHT mode followed by Key Word "SCH" indicates that single chain mode is enabled on this radio
    TD/TM/TC(*/*/*/*/*/*): "*" is the time used by Data/Mgmt/Ctrl Frames(%) in a 10 seconds time slot in the past 1 minute
    AP followed by "^" indicates that spectrum monitoring is enabled on the radio in AP mode
    Total Radios:24



  • 4.  RE: Client connection problem

    EMPLOYEE
    Posted Aug 20, 2015 03:59 AM

    ersinerol,

     

    How dense is your deployment?  It looks like the access points are being run at almost full power.  That could cause roaming and disconnect issues because the clients will hold onto access points longer than they should.  You should probably reduce the ARM Minimum TX power to 12 and the ARM maximum TX power to 18.  Also on your Virtual AP profiles, you should enable "Drop Broadcast and Multicast".  After you do those two things, you should collect information from show ap radio-summary again.

     

    On the 2.4ghz side of the IT.WAP.ARB105.PLT-501 radio, the RF utilization is at 38% which is high.  Reducing the power and dropping the broadcasts can help that.

     

    IT.WAP.ARB105.PLT-501   3.Kat_AP_Group  105      172.28.3.97   2.4   AP:HT:1      21/22         -96/38/8   8/5/0/1/0/1   9/9/11/11/11/10    2/1/0/1/0/1
    IT.WAP.ARB105.PLT-501   3.Kat_AP_Group  105      172.28.3.97   5     AP:HT:161-   24/24         -93/1/0    0/0/0/0/0/0   0/0/0/0/0/0        0/0/0/0/0/0