Same pattern here... i did a debug and seems like something in the driver:
“show ap tech-support ap-name AP225-G-frecuency-Issues Archivo-TechSupp-AP225-G-frecuency-Issues.txt”
I extract few lines:
show ap debug datapath ap-name "AP225-G-frecuency-Issues "
Datapath Parameters Table
-------------------------
essid encr-alg client-vlan-id tunnel-id gre-type deny-bcast num-clients
----- -------- -------------- --------- -------- ---------- -----------
Uni WPA2 8021X AES 1128 0x10951 0x8210 disable 6
Mae WPA2 8021X AES 1128 0x10608 0x8200 disable 1
Uni WPA2 8021X AES 1128 0x105b1 0x8310 disable 0
Mae WPA2 8021X AES 1128 0x10952 0x8300 disable 0
show ap debug client-table ap-name "AP225-G-frecuency-Issues "
Client Table
------------
MAC ESSID BSSID Assoc_State HT_State AID PS_State UAPSD Tx_Pkts Rx_Pkts PS_Qlen Tx_Retries Tx_Rate Rx_Rate Last_ACK_SNR Last_Rx_SNR TX_Chains Tx_Timestamp Rx_Timestamp MFP Status (C,R) Idle time Client health (C/R)
--- ----- ----- ----------- -------- --- -------- ----- ------- ------- ------- ---------- ------- ------- ------------ ----------- --------- ------------ ------------ ---------------- --------- -------------------
68:c4:4d:4c:43:cb Mae 18:64:72:14:85:30 Associated WSsb 0x2 Awake (0,0,0,0,N/A,0) 222 69 0 154 45 19 11 9 3[0x7] Thu Jan 26 12:05:34 2017 Thu Jan 26 12:05:34 2017 (0,0) 0 100/65
f4:09:d8:4f:6d:7b Mae 18:64:72:14:85:30 Authenticated AWvSsEe Awake (0,0,0,0,N/A,0) 289 45 0 9 866 780 50 48 3[0x7] Thu Jan 26 12:05:28 2017 Thu Jan 26 12:05:28 2017 (0,0) 5 100/65
f4:09:d8:4f:6d:7b Uni 18:64:72:14:85:31 Associated AWvSsEe 0x6 Awake (0,0,0,0,N/A,0) 59 20 0 21 866 780 44 47 3[0x7] Thu Jan 26 12:05:34 2017 Thu Jan 26 12:05:34 2017 (0,0) 0 100/65
c0:bd:d1:f6:01:c6 Uni 18:64:72:14:85:31 Associated AWvSsEe 0x4 Awake (0,0,0,0,N/A,0) 1270 1003 0 124 195 87 10 15 3[0x7] Thu Jan 26 12:05:34 2017 Thu Jan 26 12:05:34 2017 (0,0) 0 81/65
24:f0:94:41:d6:d4 Uni 18:64:72:14:85:31 Associated AWvSsEe 0x5 Power-save (0,0,0,0,N/A,0) 11 10 3 15 433 6 7 7 3[0x7] Thu Jan 26 12:01:18 2017 Thu Jan 26 12:01:21 2017 (0,0) 253 100/65
68:ae:20:0c:c2:6a Uni 18:64:72:14:85:31 Associated WQSs 0x3 Awake (0,0,0,0,N/A,0) 16627 15087 0 2981 14 13 9 7 3[0x7] Thu Jan 26 12:05:31 2017 Thu Jan 26 12:04:44 2017 (0,0) 50 33/65
64:9a:be:38:33:62 Uni 18:64:72:14:85:31 Associated AWvSsEQ 0x1 Awake (0,0,0,0,N/A,0) 11362 10741 0 1388 7 6 11 6 3[0x7] Thu Jan 26 12:05:30 2017 Thu Jan 26 12:02:09 2017 (0,0) 204 28/65
34:e6:ad:34:e0:18 Uni 18:64:72:14:85:31 Associated WvSsEbQM 0x2 Awake (0,0,0,0,N/A,0) 145521 96292 0 11670 433 351 34 27 3[0x7] Thu Jan 26 12:05:34 2017 Thu Jan 26 12:05:34 2017 (0,0) 0 90/65
1c:7b:21:b4:71:3f Mae 18:64:72:14:85:20 Authenticated sb Awake (0,0,0,0,N/A,0) 33 43 0 35 11 19 34 31 1[0x1] Fri Jan 20 19:05:55 2017 Thu Jan 26 10:58:56 2017 (0,0) 3999 90/65
9c:20:7b:0d:86:6a Mae 18:64:72:14:85:20 Authenticated Qb Awake (0,0,0,0,N/A,0) 98 234 0 50 39 26 17 25 1[0x1] Fri Jan 20 19:04:18 2017 Thu Jan 26 12:05:00 2017 (0,0) 34 90/65
Num of associated clients: 7
UAPSD:(VO,VI,BK,BE,Max SP,Q Len)
HT Flags: A - LDPC Coding; W - 40MHz; S - Short GI 40; s - Short GI 20
D - Delayed BA; G - Greenfield; R - Dynamic SM PS
Q - Static SM PS; N - A-MPDU disabled; B - TX STBC
b - RX STBC; M - Max A-MSDU; I - HT40 Intolerant; t turbo-rates (256-QAM)
VHT Flags: C - 160MHz/80+80MHz; c - 80MHz; V - Short GI 160; v - Short GI 80
E - Beamformee; e - Beamformer
HT_State shows client's original capabilities (not operational capabilities)
show ap debug driver-log ap-name "AP225-G-frecuency-Issues "
reset: !!!BIG-hammer!!!
[564399.224855] wl1 bmac set short slot 1, wl status 1
[564399.225533] wl1 bmac set short slot 1, wl status 1
[564399.256318] wl1: ap watchdog handler error
[564401.170057] wl1: bcn inactivity detected HAMMERING
[564401.170069] wl1: txbcnfrm 0 prev txbcnfrm 0 txbcn inactivity 2 timeout 2
[564401.170081]
[564401.170083] chan dur ibss obss interf time
[564401.170093] wl1: fatal error, reinitializing
[564401.170104] wl1: wlc_reset: !!!BIG-hammer!!!
[564401.225479] wl1 bmac set short slot 1, wl status 1
[564401.226100] wl1 bmac set short slot 1, wl status 1
[564401.256888] wl1: ap watchdog handler error
[564403.168993] wl1: bcn inactivity detected HAMMERING
[564403.169005] wl1: txbcnfrm 0 prev txbcnfrm 0 txbcn inactivity 2 timeout 2
[564403.169017]
.....
[564455.169713] chan dur ibss obss interf time
[564455.169723] wl1: fatal error, reinitializing
[564455.169733] wl1: wlc_reset: !!!BIG-hammer!!!
[564455.224983] wl1 bmac set short slot 1, wl status 1
[564455.225644] wl1 bmac set short slot 1, wl status 1
[564455.256365] wl1: ap watchdog handler error
[564457.169511] wl1: bcn inactivity detected HAMMERING
[564457.169522] wl1: txbcnfrm 0 prev txbcnfrm 0 txbcn inactivity 2 timeout 2
[564457.169535]
[564457.169537] chan dur ibss obss interf time
[564457.169547] wl1: fatal error, reinitializing
[564457.169558] wl1: wlc_reset: !!!BIG-hammer!!!
[564457.194509] stats > 100: ccastats_us: 4077, acc->statss_ms: 2
[564457.225173] wl1 bmac set short slot 1, wl status 1
[564457.225792] wl1 bmac set short slot 1, wl status 1
[564457.229810] wl0: wlc_ampdu_tx_send_delba: tid 6 initiator 1 reason 39 dest 24:f0:94:41:d6:d4
[564457.256587] wl1: ap watchdog handler error
Driver Log
--------------------------------------------------------
show ap debug radio-stats ap-name "AP225-G-frecuency-Issues" radio 0 advanced
RADIO Stats
-----------
Parameter Value
--------- -----
------------------- General
Total Radio Resets 8
Resets Beacon Fail 0
BB Check Positives 0
Resets BeacQ Stuck 0
Resets Fatal Intr 0
Resets RX Overrun 0
Resets RF Gain 0
Resets MTU Change 0
Resets TX Timeouts 0
Resets RX Timeouts 0
POE-Related Resets 0
External Reset 0
PCI Fatal Intr Reset 0
Chainmask Reset 0
TX stat Reset 0
TX Power Changes 3
Channel Changes 2
Failed Channel Changes 0
Radio Band Changes 0
Current Noise Floor 92
Dummy NF pkts on home channel 0
Dummy NF pkts on scan channel 0
Avail TX Buffers 2048
11g Protection 0
Last TX Antenna 0
Last RX Antenna 0
Scan Requests 54759
Scan Rejects 15427
Load aware Scan Rejects 60
PS aware Scan Rejects 0
EAP Scan Rejects 778
Voice aware Scan Rejects 14325
Video aware Scan Rejects 264
UAPSD Scan Rejects 0
Post radar related scan Rejects 0
CABQ traffic Scan Rejects 0
Radio Reset Scan Rejects 0
Queue Drain Scan Rejects 0
Scan Success 39198
EIRP 18
MAX EIRP 22
Dummy002 19
Dummy007 8
Dummy010 1136
Dummy011 82710
Dummy012 0
Dummy013 0
Dummy014 0
Dummy015 0
Dummy016 0
Dummy017 19
Dummy018 0
Dummy019 0
Dummy020 0
Dummy021 0
Dummy022 22223
------------------- Transmit
Tx Time perct @ beacon intvl 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Tx Frames Rcvd 7124217
Tx Bcast Frames Rcvd 0
Tx Frames Dropped 723350
Tx Bcast Frames Dropped 0
Tx Frames Transmitted 39305108
Tx Bytes Rcvd 4123176852
Tx Bytes Transmitted 4200678483
Tx Time Frames Rcvd 1107283613
Tx Time Frames Dropped 59540255
Tx Time Frames Transmitted 1107283613
Tx PS Unicast 0
Tx DTIM Broadcast 0
Tx Success With Retry 580417
Tx Multiple Retries 48169
Tx Mgmt Frames 1163162
Tx Mgmt Frames(PPS) 0
Tx Beacons Transmitted 10998699
Tx Beacons Transmitted(PPS) 0
Tx Probe Responses 64115
Tx Probe Responses(PPS) 0
Tx Data Transmitted Retried 5403232
Tx Data Transmitted 6279400
Tx Data Frames 7120523
Tx Broadcast Data Frames In 0
Tx Data Bytes Transmitted 4134319704
Tx Data Bytes 4208380682
Tx Time Data Transmitted 661177657
Tx Time BC/MC Data 6184
Tx Time Data dropped 59540255
Tx Time Data 661177657
Tx Time Data (Ideal) 284675246
Client Health Samples 3944211
Tx Broadcast Data Frames Sent 0
Tx Broadcast Data Frames Sent(PPS) 0
Tx Multicast Data Frames 27651
Tx Multicast Data Frames(PPS) 0
Tx Workqueue Frames 0
Tx Bypass Frames 0
Tx DMO Multicast 0
Tx DMO Invalid 0
Tx DMO Converted 0
Tx DMO Replicated 0
Tx DMO Dropped 0
Tx DMO No Client 0
Tx DMO No BSSID 0
Tx Unicast Data Frames 6294682
Tx RTS Frames 9543605
Tx RTS Frames(PPS) 0
Tx RTS Success 3917024
Tx RTS Failed 5626581
Tx CTS Frames 1743003
Tx CTS Frames(PPS) 0
Tx Powersave Queue Timeouts 0
Tx Dropped After Retry 0
Tx Dropped No Buffer 0
Tx Missed ACKs 683721
Tx Failed Beacons 22169
Tx Multi-Beacon Fail 0
Tx Long Preamble 740603
Tx Short Preamble 0
Tx Beacon Interrupts 11020870
Tx Interrupts 0
Tx FIFO Underrun 0
Tx Allocated Desc 7124217
Tx Freed Desc 0
Tx EAPOL Frames 30465
TX STBC Frames 844933
TX LDPC Frames 2498708
Tx AGGR Good 3820303
Tx AGGR Unaggr 113946
Tx AGGR Retry 485857
Tx WMM DATA [BK] 367578
Tx Data Priority [BE] 2941642
Tx Data Priority [VI] 22
Tx Data Priority [VO] 2985521
Tx Data Frames 12 Mbps (Mon) 161620
Tx Data Frames 54 Mbps (Mon) 1432623
Tx Data Frames 108 Mbps (Mon) 1516130
Tx Data Frames 300 Mbps (Mon) 1540460
Tx Data Frames 450 Mbps (Mon) 1573733
Tx Data Frames 1300 Mbps (Mon) 70197
Tx Data Frames 1300 Mbps+ (Mon) 0
Tx Data Bytes 12 Mbps (Mon) 77740156
Tx Data Bytes 54 Mbps (Mon) 779547490
Tx Data Bytes 108 Mbps (Mon) 1355673583
Tx Data Bytes 300 Mbps (Mon) 1089933044
Tx Data Bytes 450 Mbps (Mon) 798904944
Tx Data Bytes 1300 Mbps (Mon) 32520487
Tx Data Bytes 1300 Mbps+ (Mon) 0
Tx 9 Mbps 739976
Tx 12 Mbps 8
Tx 24 Mbps 63
Tx HT 7.2 Mbps 131137
Tx HT 14.4 Mbps 303377
Tx HT 21.7 Mbps 2776
Tx HT 27 Mbps 67
Tx HT 28.9 Mbps 2738
Tx HT 30 Mbps 586502
Tx HT 40.5 Mbps 66
Tx HT 43.3 Mbps 1676
Tx HT 45 Mbps 535358
Tx HT 57.8 Mbps 524
Tx HT 58.5 Mbps 31
Tx HT 60 Mbps 751752
Tx HT 65 Mbps 181679
Tx HT 72.2 Mbps 265
Tx HT 90 Mbps 417256
Tx HT 97.5 Mbps 164623
Tx HT 117 Mbps 169
Tx HT 120 Mbps 209081
Tx HT 130 Mbps 500842
Tx HT 135 Mbps 40911
Tx HT 150 Mbps 46531
Tx HT 175.5 Mbps 73
Tx HT 180 Mbps 10952
Tx HT 195 Mbps 380022
Tx HT 234 Mbps 101
Tx HT 240 Mbps 3198
Tx HT 260 Mbps 230135
Tx HT 270 Mbps 606
Tx HT 300 Mbps 147
Tx VHT 292.5 Mbps 117692
Tx VHT 325 Mbps 171368
Tx VHT 351 Mbps 26
Tx VHT 390 Mbps 363961
Tx VHT 433.3 Mbps 1038378
Tx VHT 468 Mbps 12
Tx VHT 520 Mbps 19140
Tx VHT 526.5 Mbps 15
Tx VHT 585 Mbps 10979
Tx VHT 650 Mbps 6325
Tx VHT 702 Mbps 16
Tx VHT 780 Mbps 5243
Tx VHT 866.7 Mbps 28399
Tx VHT 975 Mbps 38
Tx VHT 1170 Mbps 20
Tx VHT 1300 Mbps 10
Tx WMM [BK] 363008
Tx WMM [BE] 2936847
Tx WMM [VI] 22
Tx WMM [VO] 2979523
Tx WMM [BK] Dropped 878
Tx WMM [BE] Dropped 31435
Tx WMM [VI] Dropped 1
Tx WMM [VO] Dropped 112849
Tx UAPSD OverflowDrop 0
TX Timeouts 0
Lost Carrier Events 0
Tx HT40 Hang Detected 0
Tx HT40 Hang Stuck 0
Tx HT40 Hang Possible 0
Tx HT40 Dfs IMM WAR 0
Tx HT40 Dfs HT20 WAR 0
Tx MAC/BB Hang Stuck 0
Tx Mgmt Bytes 54925101
Tx Beacons Bytes 0
Tx Managment Frames Dropped 571830
Tx Data Frames Dropped 151520
Tx AMSDU pkt count 0
Tx EAPOL Frames Rcvd 30467
Tx EAPOL Frames Dropped 0
------------------- Receive
Rx Last SNR 43
Rx Last SNR CTL0 43
Rx Last SNR CTL1 42
Rx Last SNR CTL2 40
Rx Last SNR EXT0 43
Rx Last SNR EXT1 42
Rx Last SNR EXT2 40
Rx Last ACK SNR 43
Rx Frames Received 17349116
Rx Good Frames 16268094
Rx Bad Frames 1081022
Rx Total Data Frames Recvd 4181985
Rx Total Mgmt Frames Recvd 1459967
Rx Total Control Frames Recvd 10626142
Rx Total Bytes Recvd 3408545096
Rx Total Data Bytes Recvd 2208072561
Rx Total RTS Frames Recvd 1772842
Rx Total CTS Frames Recvd 4358109
Rx Total ACK Frames 376714
Rx Total Beacons Received 34204
Rx Total Probe Requests 266435
Rx Total Probe Responses 338
Rx Retry Frames 813299
Channel Busy 1s 2
Channel Busy 4s 1
Channel Busy 64s 3
Ch Busy perct @ beacon intvl 1 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2
Rx Time perct @ beacon intvl 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Rx Discarded Events 0
Rx ARM Scan Frames 0
Rx Data Frames Retried 483511
Rx Data Frames 5294491
Rx Data Frames(PPS) 0
Rx Data Bytes 2208072561
Rx Time Data 542106938
Rx Duplicate Frames 11724
Rx Broadcast Data Frames 71
Rx Multicast Data Frames 161
Rx Unicast Data Frames 4928038
Rx Null Data Frames 1083011
Rx Mgmt Frames 5048931
Rx Mgmt Frames(PPS) 0
Rx Control Frames 10626142
Rx Control Frames(PPS) 0
Rx Frames To Me 15722659
Rx Bytes To Me 3408545096
Rx Time To Me 1489550426
Rx Broadcast Frames 514942
Rx Probe Requests 90593
Rx Probe Requests(PPS) 0
Rx RTS Frames 1725089
Rx RTS Frames(PPS) 0
Rx CTS Frames 3917024
Rx CTS Frames(PPS) 0
Rx PS Poll Frames 28050
Rx CRC Errors 1081017
Rx PLCP Errors 57674
Rx Frames Dropped 11438326
Rx PHY Events 25048240
Rx RADAR Events 0
RX Interrupts 0
RX Overrun 0
Rx Undecryptable 0
Rx EAPOL Frames 23599
Rx STBC Frames 716111
Rx LDPC Frames 1185771
Rx Data Priority [BK] 105965
Rx Data Priority [BE] 3770267
Rx Data Priority [VI] 202854
Rx Data Priority [VO] 102899
Rx Data Frames 12 Mbps (Mon) 361350
Rx Data Frames 54 Mbps (Mon) 1791647
Rx Data Frames 108 Mbps (Mon) 955561
Rx Data Frames 300 Mbps (Mon) 629169
Rx Data Frames 450 Mbps (Mon) 431982
Rx Data Frames 1300 Mbps (Mon) 12276
Rx Data Frames 1300 Mbps+ (Mon) 0
Rx Data Bytes 12 Mbps (Mon) 51363930
Rx Data Bytes 54 Mbps (Mon) 1575479703
Rx Data Bytes 108 Mbps (Mon) 229712449
Rx Data Bytes 300 Mbps (Mon) 264415827
Rx Data Bytes 450 Mbps (Mon) 84631837
Rx Data Bytes 1300 Mbps (Mon) 2468815
Rx Data Bytes 1300 Mbps+ (Mon) 0
Rx 6 Mbps 128571
Rx 9 Mbps 365491
Rx 12 Mbps 188913
Rx 18 Mbps 149337
Rx 24 Mbps 100124
Rx 36 Mbps 60159
Rx 48 Mbps 207692
Rx HT 6.5 Mbps 163653
Rx HT 7.2 Mbps 4232
Rx HT 13 Mbps 110149
Rx HT 13.5 Mbps 78278
Rx HT 14.4 Mbps 10721
Rx HT 19.5 Mbps 39290
Rx HT 21.7 Mbps 281
Rx HT 26 Mbps 6307
Rx HT 27 Mbps 352387
Rx HT 28.9 Mbps 5571
Rx HT 30 Mbps 13157
Rx HT 39 Mbps 3847
Rx HT 40.5 Mbps 850381
Rx HT 43.3 Mbps 836
Rx HT 45 Mbps 9346
Rx HT 52 Mbps 1220
Rx HT 54 Mbps 308260
Rx HT 57.8 Mbps 4
Rx HT 58.5 Mbps 171721
Rx HT 60 Mbps 100193
Rx HT 65 Mbps 35648
Rx HT 72.2 Mbps 88
Rx HT 78 Mbps 411
Rx HT 81 Mbps 223908
Rx HT 86.7 Mbps 115
Rx HT 90 Mbps 48165
Rx HT 97.5 Mbps 11496
Rx HT 104 Mbps 1
Rx HT 108 Mbps 250390
Rx HT 117 Mbps 172322
Rx HT 120 Mbps 4006
Rx HT 121.5 Mbps 9786
Rx HT 130 Mbps 4553
Rx HT 135 Mbps 8933
Rx HT 150 Mbps 48972
Rx HT 162 Mbps 40249
Rx HT 175.5 Mbps 125030
Rx HT 195 Mbps 9913
Rx HT 216 Mbps 22627
Rx HT 234 Mbps 58665
Rx HT 243 Mbps 691
Rx HT 260 Mbps 5475
Rx HT 270 Mbps 2
Rx VHT 29.3 Mbps 12660
Rx VHT 32.5 Mbps 3385
Rx VHT 87.8 Mbps 136235
Rx VHT 263.3 Mbps 58142
Rx VHT 292.5 Mbps 68777
Rx VHT 325 Mbps 25548
Rx VHT 351 Mbps 84439
Rx VHT 390 Mbps 213838
Rx VHT 433.3 Mbps 108157
Rx VHT 468 Mbps 3813
Rx VHT 526.5 Mbps 704
Rx VHT 585 Mbps 327
Rx VHT 702 Mbps 39
Rx VHT 780 Mbps 155
Rx VHT 866.7 Mbps 7238
Rx WMM [BK] 72538
Rx WMM [BE] 3377971
Rx WMM [VI] 201742
Rx WMM [VO] 90953
RX bad length 0
Rx Null Src MAC 28539
------------------- SLB
SLB: Total Clients Found 0
....
SLB: Assoc Requests Refused 0
Rx Data Frames TxBF 106
Throttle drops 0
Stop all but Mgmt 0
CCA percentage of our bss 1
CCA percentage of other bss 0
CCA percentage of interference 0
.....
MU-NDPA frames Tx failed 0
MU-NDP frames Tx failed 0
MU Sequences posted 0
Client swap with pkt drop 0
Client swap pkt drop frames 0
...
..........................
...
MU Sequences posted 0
Client swap with pkt drop 0
Client swap pkt drop frames 0
ANUL RADIO Stats
----------------
Parameter Value
--------- -----
ANUL Assoc Rejects 0
ANUL Auth Rejects 0
ANUL Dos STA Rejects 0
ANUL Auth Throttle Rejects 0
ANUL Max STA Rejects 0
show ap debug radio-stats ap-name "AP225-G-frecuency-Issues" radio 1 advanced
RADIO Stats
-----------
Parameter Value
--------- -----
------------------- General
Total Radio Resets 246575
Resets Beacon Fail 0
BB Check Positives 0
....
External Reset 0
PCI Fatal Intr Reset 0
Chainmask Reset 0
TX stat Reset 0
TX Power Changes 5
Channel Changes 2
Failed Channel Changes 0
Radio Band Changes 0
Current Noise Floor 96
Dummy NF pkts on home channel 0
Dummy NF pkts on scan channel 0
Avail TX Buffers 2048
11g Protection 1
Last TX Antenna 0
Last RX Antenna 0
Scan Requests 318059
Scan Rejects 5200
Load aware Scan Rejects 0
Any help is welcome.