Wireless Access

We had reports customer reports this morning complaining about general connectivity. Running some basic commands, I couldn't see anything for today, but could see that there were definate issues yesterday with error thresholds exceeded on 1 AP

) #show ap arm history ap-name ap105-xxxxxx

Interface :wifi0

Interface :wifi1

ARM History

-----------

Time of Change       Old Channel  New Channel  Old Power  New Power  Reason

--------------       -----------  -----------  ---------  ---------  ------

2013-09-09 16:55:20  6            1            9          9          E

2013-09-09 12:25:57  1            6            9          9          E

2013-09-05 07:41:10  6            1            9          9          E

2013-09-03 12:31:24  11           6            9          9          E

2013-09-03 10:18:56  6            11           9          9          E

2013-09-03 05:13:26  6            6            12         9          P-

2013-09-03 04:59:31  6            6            9          12         P+

I: Interference, R: Radar detection, N: Noise exceeded, E: Error threshold exceeded, INV: Invalid Channel, G: Rogue AP Containment, M: Empty Channel, P+: Increase Power, P-: Decrease Power, 40INT: 40MHZ intol detected on 2.4G, NO40INT: 40MHz intol cleared on 2.4G, OFF: Turn off Radio, ON: Turn on Radio

Are there any additional commnads that I can run to find which error threshold has been exceeded?

When the Error threshold has been execced it usually means that you have a lot PHY/MAC errors which could be cause by Layer 2 retransmissions , Interference , Low SNR , etc..

You could run the following show ap arm rf summary <ap-name> , this command will tell you know whether there's a lot PHY/MAC errors , noice and retries on a particular channel

Im not seeing much in the way of errors but the area is quiet at the moment - I will retrt later when it is busier - Thx for the command syntax

Channel Summary
---------------
channel  retry  phy-err  mac-err  noise  cov-idx(Total)  intf_idx(Total)
-------  -----  -------  -------  -----  --------------  ---------------
36       0      0        0        93     0/0(0)          0/15//0/0(15)
40       0      0        0        92     8/0(8)          43/0//0/0(43)
44       0      0        0        93     0/0(0)          0/15//0/0(15)
48       0      0        0        93     0/0(0)          0/5//0/0(5)
52       0      0        0        93     0/0(0)          14/0//0/0(14)
56       0      0        0        93     0/0(0)          0/5//0/0(5)
60       0      0        0        93     0/0(0)          0/3//0/0(3)
64       0      0        0        93     0/0(0)          10/0//0/0(10)
100      0      0        0        93     8/0(8)          0/0//0/0(0)
104      0      0        0        93     0/0(0)          0/0//0/0(0)
108      0      0        0        93     0/0(0)          0/0//0/0(0)
112      0      0        0        93     0/0(0)          0/0//0/0(0)
116      0      0        0        93     0/0(0)          0/0//0/0(0)
120      0      0        0        93     0/0(0)          0/0//0/2(2)
124      0      0        0        93     0/1(1)          0/0//7/0(7)
128      0      0        0        93     0/0(0)          0/0//0/2(2)
132      0      0        0        93     0/0(0)          0/0//0/0(0)
136      0      0        0        93     0/0(0)          0/2//0/0(2)
140      0      0        0        93     0/0(0)          6/0//0/0(6)
1        6      0        2        94     7/24(31)        115/7//268/44(434)
6        0      0        0        94     0/19(19)        43/37//232/130(442)
11       0      0        0        93     0/44(44)        0/19//404/49(472)

HT Channel Summary
------------------
channel_pair  Pairwise_intf_index
------------  -------------------
116-120       2
52-56         19
100-104       0
124-128       9
36-40         58
60-64         13
108-112       0
132-136       2
44-48         20

Interface Name           :wifi0
Current ARM Assignment   :100+/24
Covered channels a/g     :2/0
Free channels a/g        :16/0
ARM Edge State           :enable
Last check channel/pwr   :4m:38s/4m:27s
Last change channel/pwr  :5h:54m:50s/5h:54m:50s
Next Check channel/pwr   :2m:54s/4s
Assignment Mode          :Single Band

Interface Name           :wifi1
Current ARM Assignment   :1/9
Covered channels a/g     :0/3
Free channels a/g        :0/0
ARM Edge State           :disable
Last check channel/pwr   :3m:15s/1m:42s
Last change channel/pwr  :58m:14s/58m:14s
Next Check channel/pwr   :3m:49s/5m:15s
Assignment Mode          :Single Band