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Access Point Area

Murad*
Level 1
Level 1

Hi

i have WLC with 15 Active AP , i have big problem , for example i have 2 AP nearly me , 1st one far me about 2 meter and another one far about 7 meter , the problem is my device connected with 7 meter AP !! and didn't connect with the near one!! 

so the service be very bad , and if i have another AP far about 10 meter and i tried to restart the (7meter) access point the device connected with (10 meter) far away !!

the nearly access point that far about 2 meter work normally and more one connected on it !!

so what the solution of this ?

 

and another query : can i set the signal of AP to swap me to another AP before the signal be poor to stay the service stable ?

and what that ( RSSI Threshold (-60 to -90 dBm) ) mean ? is that relation with signal of AP ?

 

thanks

9 Replies 9

Leo Laohoo
Hall of Fame
Hall of Fame

@Murad* wrote:

the nearly access point that far about 2 meter work normally and more one connected on it !!

so what the solution of this ?


Update the wireless NIC drivers of the wireless clients.

the problem not for just one device !! more laptop and more iPhone device and Android else !

Roaming decision is taken by client, so you have little control over that from AP point of view.

 

Once client associated to a AP in a cell, it will stick to that AP unless, it is roaming criteria triggers. Therefor each device behavior will be different, some vendors do not disclose these details, so it is hard to know exactly what conditions make them move to next AP. Here are some of those details for Apple & Samsung devices.

 

I would check power level of those AP & ensure they all have similar power levels, also if possible just have your SSID on 5GHz band (instead of dual band- that will prevent from client move between 2.4GHz & 5GHz without roaming to another AP)

 

Apple Device Roaming

https://support.apple.com/en-us/HT203068

 

Samsung Device roaming

https://support.samsungknox.com/hc/en-us/articles/115013403768-Enhanced-Roaming-Algorithm

 

HTH

Rasika

*** Pls rate all useful responses ***

Android OS don't have a good way of WiFi roaming.  This is why someone came up with an app called WiFi Roaming which works very well with new and old Android devices.

For Apple, make sure the OS are updated.  Apple smartphones and iPads didn't really know how to roam until iOS 10.X.X.  So if there are old phones running 9.X.X (and older) then there's nothing to do. 

Finally, pick an AP in question.  And issue the WLC command "sh ap auto-rf 802.11a <AP Name>".  Make sure you download the complete output for the 2.4 Ghz & 5.0 Ghz radio.

Number Of Slots.................................. 2
AP Name.......................................... NOC
MAC Address...................................... f8:72:ea:6f:f3:c6
Slot ID........................................ 1
Radio Type..................................... RADIO_TYPE_80211a
Sub-band Type.................................. All
Noise Information
Noise Profile................................ PASSED
Channel 36................................... -100 dBm
Channel 40................................... -99 dBm
Channel 44................................... -92 dBm
Channel 48................................... -102 dBm
Channel 52................................... -90 dBm
Channel 56................................... -99 dBm
Channel 60................................... -97 dBm
Channel 64................................... -97 dBm
Channel 100.................................. -94 dBm
Channel 104.................................. -99 dBm
Channel 108.................................. -90 dBm
Channel 112.................................. -82 dBm
Channel 116.................................. -98 dBm

--More-- or (q)uit
Channel 132.................................. -93 dBm
Channel 136.................................. -94 dBm
Channel 140.................................. -88 dBm
Channel 149.................................. -93 dBm
Channel 153.................................. -90 dBm
Channel 157.................................. -88 dBm
Channel 161.................................. -89 dBm
Channel 165.................................. -92 dBm
Interference Information
Interference Profile......................... PASSED
Channel 36................................... -128 dBm @ 0 % busy
Channel 40................................... -128 dBm @ 0 % busy
Channel 44................................... -128 dBm @ 0 % busy
Channel 48................................... -128 dBm @ 0 % busy
Channel 52................................... -128 dBm @ 0 % busy
Channel 56................................... -128 dBm @ 0 % busy
Channel 60................................... -128 dBm @ 0 % busy
Channel 64................................... -128 dBm @ 0 % busy
Channel 100.................................. -128 dBm @ 0 % busy
Channel 104.................................. -128 dBm @ 0 % busy
Channel 108.................................. -128 dBm @ 0 % busy
Channel 112.................................. -128 dBm @ 0 % busy
Channel 116.................................. -128 dBm @ 0 % busy

--More-- or (q)uit
Channel 132.................................. -128 dBm @ 0 % busy
Channel 136.................................. -128 dBm @ 0 % busy
Channel 140.................................. -128 dBm @ 0 % busy
Channel 149.................................. -128 dBm @ 0 % busy
Channel 153.................................. -128 dBm @ 0 % busy
Channel 157.................................. -128 dBm @ 0 % busy
Channel 161.................................. -128 dBm @ 0 % busy
Channel 165.................................. -128 dBm @ 0 % busy
Rogue Histogram (20/40/80/160)
.............................................
Channel 36................................... 1/ 0/ 0/ 0
Channel 40................................... 0/ 0/ 0/ 0
Channel 44................................... 0/ 0/ 0/ 0
Channel 48................................... 0/ 0/ 0/ 0
Channel 52................................... 0/ 0/ 0/ 0
Channel 56................................... 0/ 0/ 0/ 0
Channel 60................................... 0/ 0/ 0/ 0
Channel 64................................... 0/ 0/ 0/ 0
Channel 100.................................. 0/ 0/ 0/ 0
Channel 104.................................. 0/ 0/ 0/ 0
Channel 108.................................. 0/ 0/ 0/ 0
Channel 112.................................. 0/ 0/ 0/ 0
Channel 116.................................. 0/ 0/ 0/ 0

--More-- or (q)uit
Channel 132.................................. 0/ 0/ 0/ 0
Channel 136.................................. 0/ 0/ 0/ 0
Channel 140.................................. 0/ 0/ 0/ 0
Channel 149.................................. 0/ 0/ 0/ 0
Channel 153.................................. 0/ 0/ 0/ 0
Channel 157.................................. 0/ 0/ 0/ 0
Channel 161.................................. 0/ 0/ 0/ 0
Channel 165.................................. 1/ 0/ 0/ 0
Load Information
Load Profile................................. PASSED
Receive Utilization.......................... 0 %
Transmit Utilization......................... 0 %
Channel Utilization.......................... 7 %
Attached Clients............................. 2 clients
Coverage Information
Coverage Profile............................. PASSED
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................................ 0 clients

--More-- or (q)uit
RSSI -60 dbm................................ 1 clients
RSSI -52 dbm................................ 1 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.................................. 0 clients
SNR 25 dB.................................. 0 clients
SNR 30 dB.................................. 0 clients
SNR 35 dB.................................. 1 clients
SNR 40 dB.................................. 0 clients
SNR 45 dB.................................. 1 clients
Nearby APs
AP 54:78:1a:5e:2b:f0 slot 1.................. -70 dBm on 132 40MHz (192.168.132.132) Customer-Care
AP a4:0c:c3:91:e8:10 slot 1.................. -75 dBm on 44 40MHz (192.168.132.132) B1F1
AP dc:7b:94:87:ca:50 slot 1.................. -80 dBm on 149 40MHz (192.168.132.132) B1F2
Radar Information
Channel Assignment Information
Current Channel Average Energy............... -77 dBm
Previous Channel Average Energy.............. -77 dBm
Channel Change Count......................... 544
Last Channel Change Time..................... Sun Oct 28 09:14:11 2018

--More-- or (q)uit
Recommended Best Channel..................... 100
RF Parameter Recommendations
Power Level.................................. 1
RTS/CTS Threshold............................ 2347
Fragmentation Threshold...................... 2346
Antenna Pattern.............................. 0

Persistent Interference Devices
Class Type Channel DC (%%) RSSI (dBm) Last Update Time
------------------------- ------- ------ ---------- ------------------------
All third party trademarks are the property of their respective owners.


@Murad* wrote:
AP 54:78:1a:5e:2b:f0 slot 1.................. -70 dBm on 132 40MHz (192.168.132.132) Customer-Care
AP a4:0c:c3:91:e8:10 slot 1.................. -75 dBm on 44 40MHz (192.168.132.132) B1F1
AP dc:7b:94:87:ca:50 slot 1.................. -80 dBm on 149 40MHz (192.168.132.132) B1F2

Ok, so how abut 802.11b radio? 

RSSI between the NOC AP and the other 3 is very low.  

Did that mean the distance between this 3 AP is short ? because i don't know how the RSSI measured !
and what you mean about ( Ok, so how abut 802.11b radio? ) ?

Post the complete output to the command "sh ap auto-rf 802.11b NOC".

(Cisco Controller) >show ap auto-rf 802.11b NOC

Number Of Slots.................................. 2
AP Name.......................................... NOC
MAC Address...................................... 00:22:bd:1a:10:47
Slot ID........................................ 0
Radio Type..................................... RADIO_TYPE_80211b/g
Sub-band Type.................................. All
Noise Information
Noise Profile................................ PASSED
Channel 1.................................... -81 dBm
Channel 2.................................... -77 dBm
Channel 3.................................... -70 dBm
Channel 4.................................... -93 dBm
Channel 5.................................... -92 dBm
Channel 6.................................... -85 dBm
Channel 7.................................... -87 dBm
Channel 8.................................... -93 dBm
Channel 9.................................... -93 dBm
Channel 10................................... -84 dBm
Channel 11................................... -93 dBm
Interference Information
Interference Profile......................... PASSED

--More-- or (q)uit
Channel 1.................................... -80 dBm @ 6 % busy
Channel 2.................................... -75 dBm @ 1 % busy
Channel 3.................................... -128 dBm @ 0 % busy
Channel 4.................................... -73 dBm @ 2 % busy
Channel 5.................................... -59 dBm @ 2 % busy
Channel 6.................................... -58 dBm @ 3 % busy
Channel 7.................................... -78 dBm @ 1 % busy
Channel 8.................................... -128 dBm @ 0 % busy
Channel 9.................................... -128 dBm @ 0 % busy
Channel 10................................... -128 dBm @ 0 % busy
Channel 11................................... -128 dBm @ 0 % busy
Rogue Histogram (20)
.............................................
Channel 1.................................... 4
Channel 2.................................... 1
Channel 3.................................... 0
Channel 4.................................... 0
Channel 5.................................... 0
Channel 6.................................... 1
Channel 7.................................... 0
Channel 8.................................... 0
Channel 9.................................... 0
Channel 10................................... 0

--More-- or (q)uit
Channel 11................................... 0
Load Information
Load Profile................................. PASSED
Receive Utilization.......................... 0 %
Transmit Utilization......................... 0 %
Channel Utilization.......................... 29 %
Attached Clients............................. 2 clients
Coverage Information
Coverage Profile............................. PASSED
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................................ 0 clients
RSSI -60 dbm................................ 0 clients
RSSI -52 dbm................................ 2 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

--More-- or (q)uit
SNR 20 dB.................................. 0 clients
SNR 25 dB.................................. 0 clients
SNR 30 dB.................................. 0 clients
SNR 35 dB.................................. 0 clients
SNR 40 dB.................................. 0 clients
SNR 45 dB.................................. 2 clients
Nearby APs
AP 54:78:1a:21:5a:00 slot 0.................. -87 dBm on 1 20MHz (192.168.132.132) accounting
AP 54:78:1a:5e:2b:f0 slot 0.................. -55 dBm on 11 20MHz (192.168.132.132) Customer-Care
AP 58:bc:27:0e:d7:70 slot 0.................. -87 dBm on 11 20MHz (192.168.132.132) Guest
AP a4:0c:c3:91:e8:10 slot 0.................. -56 dBm on 6 20MHz (192.168.132.132) B1F1
AP dc:7b:94:87:ca:50 slot 0.................. -66 dBm on 11 20MHz (192.168.132.132) B1F2
AP dc:7b:94:87:cc:50 slot 0.................. -84 dBm on 6 20MHz (192.168.132.132) Support
Radar Information
Channel Assignment Information
Current Channel Average Energy............... -77 dBm
Previous Channel Average Energy.............. -77 dBm
Channel Change Count......................... 6
Last Channel Change Time..................... Sun Oct 28 10:31:14 2018
Recommended Best Channel..................... 1
RF Parameter Recommendations
Power Level.................................. 2
RTS/CTS Threshold............................ 2347

--More-- or (q)uit
Fragmentation Threshold...................... 2346
Antenna Pattern.............................. 0

Persistent Interference Devices
Class Type Channel DC (%%) RSSI (dBm) Last Update Time
------------------------- ------- ------ ---------- ------------------------
All third party trademarks are the property of their respective owners.
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