how can i force client to choose Which AP to connect

xiongzhiwei · ‎07-17-2016

hello all

Currently we have a issue that when our wifi is running ,some of aps have too much clients such as

AP1:100clients

AP2: 20clients

AP3: 15clients

how can I do to put a great of clients from ap1 to ap2 or ap3 ? I had already tried to reduced the ap1's power level and increase for others and disabled the low data rates , but It looks like doesn't work.

Thanks for everyone's help !

My wlc is 2504 and my ap is 3702

Leo Laohoo · ‎07-18-2016

how can i force client to choose Which AP to connect

You can't. The wireless clients are the one that chooses which APs to join.

Upgrade the drivers to the wireless clients helps a lot.

xiongzhiwei · ‎07-18-2016

thank you for your reply

Do you have any idea to resolve the issue that some of aps have too much clients but others are not ?

Leo Laohoo · ‎07-18-2016

Do you have any idea to resolve the issue that some of aps have too much clients but others are not ?

What are these wireless clients? Are they laptops/netbooks? Are they smartphones/tablets?

xiongzhiwei · ‎07-18-2016

Actually half of they are laptops and others are smartphones , you know people often have two or more decives now .

Leo Laohoo · ‎07-18-2016

For now, upgrade the drivers of the wireless NIC and see if it improves things.

Are you able to determine if this issue is affecting 802.11b MORE than 802.11a?

xiongzhiwei · ‎07-18-2016

Hi Leo

thank you for you answer !

correct ! this issue is affecting 802.11b MORE than 802.11a . so you think now the only way I can try is upgrade the dirvers of the NIC ?

hajia · ‎07-18-2016

Hi,

If the users connect to 802.11g more then 802.11a, you should check your load balance setting, WLC -- Wireless -- Advanced -- Load Balance.

Leo Laohoo · ‎07-18-2016

this issue is affecting 802.11b MORE than 802.11a

Hmmmm ... Co-channel interference. What exact models of APs?

you should check your load balance setting

Unless you're looking for more trouble, DO NOT enable Load Balancing.

xiongzhiwei · ‎07-18-2016

Hmmm.. what's the meaning of ap's exact models ? do you mean if ap working at 802.11a and 802.11b ?

Leo Laohoo · ‎07-18-2016

No, what are the different AP models do you have?

xiongzhiwei · ‎07-18-2016

ap model is AIR-CAP3702I-H-K9

Leo Laohoo · ‎07-18-2016

ap model is AIR-CAP3702I-H-K9

Ok, so is CleanAir enabled?

Pick two APs that the wireless clients don't "like" to go to and post the complete output to the command "sh ap auto-rf 802.11b <AP Name>".

xiongzhiwei · ‎07-18-2016

yes Cleanair is enabled

here is the output :

(Cisco Controller) >show ap auto-rf 802.11b YXP-AP-3F-08

Number Of Slots.................................. 2
AP Name.......................................... YXP-AP-3F-08
MAC Address...................................... ec:bd:1d:80:13:8c
Slot ID........................................ 0
Radio Type..................................... RADIO_TYPE_80211b/g
Sub-band Type.................................. All
Noise Information
    Noise Profile................................ PASSED
    Channel 1.................................... -91 dBm
    Channel 2.................................... -86 dBm
    Channel 3.................................... -86 dBm
    Channel 4.................................... -79 dBm
    Channel 5.................................... -69 dBm
    Channel 6.................................... -87 dBm
    Channel 7.................................... -83 dBm
    Channel 8.................................... -61 dBm
    Channel 9.................................... -84 dBm
    Channel 10................................... -88 dBm
    Channel 11................................... -83 dBm
    Channel 12................................... -86 dBm
    Channel 13................................... -87 dBm

--More-- or (q)uit
Interference Information
    Interference Profile......................... PASSED
    Channel 1.................................... -55 dBm @ 12 % busy
    Channel 2.................................... -46 dBm @ 2 % busy
    Channel 3.................................... -128 dBm @ 0 % busy
    Channel 4.................................... -128 dBm @ 0 % busy
    Channel 5.................................... -128 dBm @ 0 % busy
    Channel 6.................................... -128 dBm @ 0 % busy
    Channel 7.................................... -128 dBm @ 0 % busy
    Channel 8.................................... -128 dBm @ 0 % busy
    Channel 9.................................... -128 dBm @ 0 % busy
    Channel 10................................... -59 dBm @ 6 % busy
    Channel 11................................... -128 dBm @ 0 % busy
    Channel 12................................... -58 dBm @ 2 % busy
    Channel 13................................... -128 dBm @ 0 % busy
Load Information
    Load Profile................................. FAILED
    Receive Utilization.......................... 0 %
    Transmit Utilization......................... 2 %
    Channel Utilization.......................... 81 %
    Attached Clients............................. 28 clients
Coverage Information
    Coverage Profile............................. PASSED

--More-- or (q)uit
    Failed Clients............................... 0 clients
Client Signal Strengths
    RSSI -100 dbm................................ 0 clients
    RSSI -92 dbm................................ 0 clients
    RSSI -84 dbm................................ 0 clients
    RSSI -76 dbm................................ 0 clients
    RSSI -68 dbm................................ 2 clients
    RSSI -60 dbm................................ 5 clients
    RSSI -52 dbm................................ 21 clients
Client Signal To Noise Ratios
    SNR    0 dB.................................. 0 clients
    SNR    5 dB.................................. 0 clients
    SNR   10 dB.................................. 0 clients
    SNR   15 dB.................................. 0 clients
    SNR   20 dB.................................. 3 clients
    SNR   25 dB.................................. 0 clients
    SNR   30 dB.................................. 2 clients
    SNR   35 dB.................................. 6 clients
    SNR   40 dB.................................. 9 clients
    SNR   45 dB.................................. 8 clients
Nearby APs
    AP 00:c8:8b:3a:29:90 slot 0.................. -81 dBm on   1 (0a:46:37:fd:00:4b)
    AP 00:c8:8b:3a:2a:00 slot 0.................. -76 dBm on 11 (0a:46:37:fd:00:4b)

--More-- or (q)uit
    AP 00:c8:8b:3e:f3:a0 slot 0.................. -61 dBm on   1 (0a:46:37:fd:00:4b)
    AP 00:c8:8b:5c:d7:90 slot 0.................. -50 dBm on   1 (0a:46:37:fd:00:4b)
    AP 00:c8:8b:5c:dc:20 slot 0.................. -82 dBm on   1 (0a:46:37:fd:00:4b)
    AP 00:f2:8b:96:f3:10 slot 0.................. -78 dBm on 11 (0a:46:37:fd:00:4b)
    AP 00:fe:c8:2f:63:e0 slot 0.................. -64 dBm on   6 (0a:46:37:fd:00:4b)
    AP 00:fe:c8:33:1e:90 slot 0.................. -46 dBm on   6 (0a:46:37:fd:00:4b)
    AP 00:fe:c8:eb:b7:d0 slot 0.................. -47 dBm on 11 (0a:46:37:fd:00:4b)
    AP 04:62:73:61:e7:40 slot 0.................. -86 dBm on   1 (0a:46:37:fd:00:4b)
    AP 58:97:bd:6e:d3:10 slot 0.................. -48 dBm on   6 (0a:46:37:fd:00:4b)
    AP 5c:83:8f:78:f6:60 slot 0.................. -84 dBm on   6 (0a:46:37:fd:00:4b)
    AP 5c:83:8f:b8:14:90 slot 0.................. -84 dBm on   1 (0a:46:37:fd:00:4b)
    AP 5c:83:8f:fe:ff:f0 slot 0.................. -64 dBm on 11 (0a:46:37:fd:00:4b)
    AP a8:9d:21:ee:03:f0 slot 0.................. -58 dBm on   6 (0a:46:37:fd:00:4b)
    AP e4:aa:5d:07:de:e0 slot 0.................. -72 dBm on   1 (0a:46:37:fd:00:4b)
    AP ec:bd:1d:10:32:00 slot 0.................. -83 dBm on 11 (0a:46:37:fd:00:4b)
    AP ec:bd:1d:1d:04:c0 slot 0.................. -63 dBm on   1 (0a:46:37:fd:00:4b)
    AP ec:bd:1d:62:13:40 slot 0.................. -67 dBm on   6 (0a:46:37:fd:00:4b)
    AP ec:bd:1d:62:1f:30 slot 0.................. -62 dBm on 11 (0a:46:37:fd:00:4b)
Radar Information
RF Parameter Recommendations
    Power Level.................................. 5
    RTS/CTS Threshold............................ 2347
    Fragmentation Threshold...................... 2346

--More-- or (q)uit
Antenna Pattern.............................. 0

Persistent Interference Devices
Class Type Channel DC (%%) RSSI (dBm) Last Update Time
------------------------- ------- ------ ---------- ------------------------
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(Cisco Controller) >show ap auto-rf 802.11b YXP-AP-3F-02

Number Of Slots.................................. 2
AP Name.......................................... YXP-AP-3F-02
MAC Address...................................... ec:bd:1d:5d:7f:00
Slot ID........................................ 0
Radio Type..................................... RADIO_TYPE_80211b/g
Sub-band Type.................................. All
Noise Information
    Noise Profile................................ PASSED
    Channel 1.................................... -85 dBm
    Channel 2.................................... -83 dBm
    Channel 3.................................... -70 dBm
    Channel 4.................................... -68 dBm
    Channel 5.................................... -89 dBm
    Channel 6.................................... -85 dBm
    Channel 7.................................... -80 dBm
    Channel 8.................................... -89 dBm
    Channel 9.................................... -67 dBm
    Channel 10................................... -77 dBm
    Channel 11................................... -91 dBm
    Channel 12................................... -90 dBm
    Channel 13................................... -90 dBm

--More-- or (q)uit
Interference Information
    Interference Profile......................... PASSED
    Channel 1.................................... -62 dBm @ 8 % busy
    Channel 2.................................... -62 dBm @ 2 % busy
    Channel 3.................................... -33 dBm @ 2 % busy
    Channel 4.................................... -128 dBm @ 0 % busy
    Channel 5.................................... -128 dBm @ 0 % busy
    Channel 6.................................... -128 dBm @ 0 % busy
    Channel 7.................................... -51 dBm @ 2 % busy
    Channel 8.................................... -39 dBm @ 1 % busy
    Channel 9.................................... -128 dBm @ 0 % busy
    Channel 10................................... -128 dBm @ 0 % busy
    Channel 11................................... -54 dBm @ 10 % busy
    Channel 12................................... -48 dBm @ 2 % busy
    Channel 13................................... -128 dBm @ 0 % busy
Load Information
    Load Profile................................. FAILED
    Receive Utilization.......................... 0 %
    Transmit Utilization......................... 3 %
    Channel Utilization.......................... 78 %
    Attached Clients............................. 18 clients
Coverage Information
    Coverage Profile............................. PASSED

--More-- or (q)uit
    Failed Clients............................... 0 clients
Client Signal Strengths
    RSSI -100 dbm................................ 0 clients
    RSSI -92 dbm................................ 0 clients
    RSSI -84 dbm................................ 0 clients
    RSSI -76 dbm................................ 0 clients
    RSSI -68 dbm................................ 1 clients
    RSSI -60 dbm................................ 2 clients
    RSSI -52 dbm................................ 15 clients
Client Signal To Noise Ratios
    SNR    0 dB.................................. 0 clients
    SNR    5 dB.................................. 0 clients
    SNR   10 dB.................................. 0 clients
    SNR   15 dB.................................. 0 clients
    SNR   20 dB.................................. 1 clients
    SNR   25 dB.................................. 0 clients
    SNR   30 dB.................................. 4 clients
    SNR   35 dB.................................. 5 clients
    SNR   40 dB.................................. 6 clients
    SNR   45 dB.................................. 2 clients
Nearby APs
    AP 00:c8:8b:4b:01:60 slot 0.................. -66 dBm on   1 (0a:46:37:fd:00:4b)
    AP 00:c8:8b:5c:d7:90 slot 0.................. -61 dBm on   1 (0a:46:37:fd:00:4b)

--More-- or (q)uit
    AP 00:f2:8b:96:f3:10 slot 0.................. -54 dBm on 11 (0a:46:37:fd:00:4b)
    AP 00:fe:c8:2f:63:e0 slot 0.................. -73 dBm on   6 (0a:46:37:fd:00:4b)
    AP 00:fe:c8:33:1e:90 slot 0.................. -63 dBm on   6 (0a:46:37:fd:00:4b)
    AP 00:fe:c8:eb:b7:d0 slot 0.................. -63 dBm on 11 (0a:46:37:fd:00:4b)
    AP 04:62:73:61:e7:40 slot 0.................. -66 dBm on   1 (0a:46:37:fd:00:4b)
    AP 58:97:bd:6e:d3:10 slot 0.................. -66 dBm on   6 (0a:46:37:fd:00:4b)
    AP 5c:83:8f:fe:ff:f0 slot 0.................. -41 dBm on 11 (0a:46:37:fd:00:4b)
    AP a8:9d:21:ee:03:f0 slot 0.................. -42 dBm on   6 (0a:46:37:fd:00:4b)
    AP ec:bd:1d:1d:04:c0 slot 0.................. -87 dBm on   1 (0a:46:37:fd:00:4b)
    AP ec:bd:1d:62:1f:30 slot 0.................. -78 dBm on 11 (0a:46:37:fd:00:4b)
    AP ec:bd:1d:af:dd:80 slot 0.................. -62 dBm on   6 (0a:46:37:fd:00:4b)
Radar Information
Channel Assignment Information
    Current Channel Average Energy............... -39 dBm
    Previous Channel Average Energy.............. -13 dBm
    Channel Change Count......................... 8
    Last Channel Change Time..................... Sun Jul 17 16:12:46 2016
    Recommended Best Channel..................... 6
RF Parameter Recommendations
    Power Level.................................. 6
    RTS/CTS Threshold............................ 2347
    Fragmentation Threshold...................... 2346
    Antenna Pattern.............................. 0

--More-- or (q)uit

Persistent Interference Devices
Class Type                 Channel DC (%%) RSSI (dBm) Last Update Time
------------------------- ------- ------ ---------- ------------------------
WiMax Mobile               11       0       -79         Fri Jul 15 10:47:45 2016
WiMax Fixed                1        0       -68         Fri Jul 15 23:08:45 2016
                             6        0       -60         Mon Jul 18 19:54:39 2016
                             11       0       -59         Thu Jul 14 03:00:29 2016
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Leo Laohoo · ‎07-18-2016

AP Name.......................................... YXP-AP-3F-08

Channel Utilization.......................... 81 %

81%??? That is really high. Above 75% and the band is totally useless.

Attached Clients............................. 28 clients

There are currently 28 wireless clients associated to this AP.

Judging from the output above, I am suspecting the wireless clients are behaving as expected. They are avoiding APs with very high co-channel interference.