Cisco 5508 wlc - 3602I AP. Intermittent wireless connectivity

Naveen WiFi · ‎01-18-2017

Hello,

I have a 5508 controller with code 8.0.140.0. It has a total of 350 Access Points belong to various offices.All of them are running only 5 GHz band. In one of the offices, which has 13 No. Access Points - 3602I model, users are experiencing intermittent connectivity since one year (I know that's quite long ;). RRM is enabled on the controller, no manual settings. We got site survey (Ekahau tool) done by a third party, and as per their suggestion, AP density is high and they seem to have large power output. I checked in the controller, power levels are either 1 or 2. I have provided required outputs (attached)from the controller, if they are of any help. I am assuming reducing power levels would solve the problem but, I do not want to opt for customized settings. I would like to have RRM take care of the AP management wrt TDC,DCA etc. Please advise what could be the possible cause for the intermittent connection. Any help is much appreciated. Thank You!

Rasika Nayanajith · ‎01-18-2017

Is it possible to get output for "debug client <mac_addr>" for a particular client while it is experiencing this issue?

Rasika

Naveen WiFi · ‎01-18-2017

I can send those logs soon, in a couple of days, maybe. But, do you see anything that's suspicious in the logs that I attached earlier? Just want to add a comment, all the APs are in flexconnect mode. Here are few logs, if that may be of any help.

(wc001) >show advanced 802.11a profile global

Default 802.11a AP performance profiles
802.11a Global Interference threshold.......... 10 %
802.11a Global noise threshold................. -70 dBm
802.11a Global RF utilization threshold........ 80 %
802.11a Global throughput threshold............ 1000000 bps
802.11a Global clients threshold............... 30 clients

RF settings for a sample AP
===========================

(wc001) >show ap auto-rf 802.11a ap109

Number Of Slots.................................. 2
AP Name.......................................... ap109
MAC Address...................................... 30:f7:0d:de:37:b1
Slot ID........................................ 1
Radio Type..................................... RADIO_TYPE_80211a
Sub-band Type.................................. All
Noise Information
Noise Profile................................ PASSED
Channel 34................................... N/A
Channel 36................................... -91 dBm
Channel 38................................... N/A
Channel 40................................... -86 dBm
Channel 42................................... N/A
Channel 44................................... -88 dBm
Channel 46................................... N/A
Channel 48................................... -91 dBm
Channel 52................................... -90 dBm
Channel 56................................... -90 dBm
Channel 60................................... -91 dBm
Channel 64................................... -91 dBm
Channel 100.................................. -90 dBm

--More-- or (q)uit

Channel 104.................................. -91 dBm
Channel 108.................................. -90 dBm
Channel 112.................................. -91 dBm
Channel 116.................................. -90 dBm
Channel 120.................................. N/A
Channel 124.................................. N/A
Channel 128.................................. N/A
Channel 132.................................. -85 dBm
Channel 136.................................. -90 dBm
Channel 140.................................. -90 dBm
Channel 149.................................. N/A
Channel 153.................................. N/A
Channel 157.................................. N/A
Channel 161.................................. N/A
Channel 165.................................. N/A
Channel 169.................................. N/A
Channel 173.................................. N/A
Interference Information
Interference Profile......................... PASSED
Channel 34................................... N/A
Channel 36................................... -128 dBm @ 0 % busy
Channel 38................................... N/A
Channel 40................................... -128 dBm @ 0 % busy

--More-- or (q)uit
Channel 42................................... N/A
Channel 44................................... -128 dBm @ 0 % busy
Channel 46................................... N/A
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
Channel 120.................................. N/A
Channel 124.................................. N/A
Channel 128.................................. N/A
Channel 132.................................. -128 dBm @ 0 % busy
Channel 136.................................. -128 dBm @ 0 % busy
Channel 140.................................. -128 dBm @ 0 % busy
Channel 149.................................. N/A
Channel 153.................................. N/A
Channel 157.................................. N/A
Channel 161.................................. N/A

--More-- or (q)uit
Channel 165.................................. N/A
Channel 169.................................. N/A
Channel 173.................................. N/A
Rogue Histogram (20/40/80)
.............................................
Channel 34................................... 0/ 0/ 0
Channel 36................................... 0/ 0/ 0
Channel 38................................... 0/ 0/ 0
Channel 40................................... 0/ 0/ 0
Channel 42................................... 0/ 0/ 0
Channel 44................................... 0/ 0/ 0
Channel 46................................... 0/ 0/ 0
Channel 48................................... 0/ 0/ 0
Channel 52................................... 0/ 0/ 0
Channel 56................................... 0/ 0/ 0
Channel 60................................... 0/ 0/ 0
Channel 64................................... 0/ 0/ 0
Channel 100.................................. 0/ 0/ 0
Channel 104.................................. 0/ 0/ 0
Channel 108.................................. 0/ 0/ 0
Channel 112.................................. 0/ 0/ 0
Channel 116.................................. 0/ 0/ 0
Channel 120.................................. 0/ 0/ 0

--More-- or (q)uit
Channel 124.................................. 0/ 0/ 0
Channel 128.................................. 0/ 0/ 0
Channel 132.................................. 0/ 0/ 0
Channel 136.................................. 0/ 0/ 0
Channel 140.................................. 0/ 0/ 0
Channel 149.................................. 0/ 0/ 0
Channel 153.................................. 0/ 0/ 0
Channel 157.................................. 0/ 0/ 0
Channel 161.................................. 0/ 0/ 0
Channel 165.................................. 0/ 0/ 0
Channel 169.................................. 0/ 0/ 0
Channel 173.................................. 0/ 0/ 0
Load Information
Load Profile................................. PASSED
Receive Utilization.......................... 0 %
Transmit Utilization......................... 0 %
Channel Utilization.......................... 0 %
Attached Clients............................. 1 clients
Coverage Information
Coverage Profile............................. PASSED
Failed Clients............................... 0 clients
Client Signal Strengths
RSSI -100 dbm................................ 0 clients

--More-- or (q)uit
RSSI -92 dbm................................ 0 clients
RSSI -84 dbm................................ 1 clients
RSSI -76 dbm................................ 0 clients
RSSI -68 dbm................................ 0 clients
RSSI -60 dbm................................ 0 clients
RSSI -52 dbm................................ 0 clients
Client Signal To Noise Ratios
SNR 0 dB.................................. 0 clients
SNR 5 dB.................................. 0 clients
SNR 10 dB.................................. 1 clients
SNR 15 dB.................................. 0 clients
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.................................. 0 clients
Nearby APs
AP 54:78:1a:64:55:50 slot 1.................. -83 dBm on 40 (0a:3f:41:0b:01:f4)
AP 88:75:56:57:9d:80 slot 1.................. -83 dBm on 132 (0a:3f:41:0b:01:f4)
AP f4:ea:67:0f:93:00 slot 1.................. -83 dBm on 40 (0a:3f:41:0b:01:f4)
AP f4:ea:67:0f:94:90 slot 1.................. -84 dBm on 36 (0a:3f:41:0b:01:f4)
AP fc:5b:39:b6:25:30 slot 1.................. -79 dBm on 40 (0a:3f:41:0b:01:f4)

--More-- or (q)uit
Radar Information
Channel Assignment Information
Current Channel Average Energy............... -72 dBm
Previous Channel Average Energy.............. 127 dBm
Channel Change Count......................... 2
Last Channel Change Time..................... Tue Jan 17 12:00:10 2017
Recommended Best Channel..................... 44
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
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