Issues with 2 AP1131AG AP's

Unanswered Question
Jan 11th, 2011

Hi,

We have a site running 2 1131AG access points on different floors with the same SSID.

There have been issues with connections dropping over the last 2-3 months to some newer laptops and iphones that have been introduced to the network. It is almost totally intermittent and after updating the IOS and laptop drivers where possible, there is a still a problem that wont go away.

I have some example logging from both AP's when this happens (apologies for the date/time differences, however the events are all sequential)

AP1

*Dec  7 03:06:03.591: %DOT11-6-ASSOC: Interface Dot11Radio0, Station   7cc5.37fc.f8cd Associated KEY_MGMT[WPA PSK]

*Dec  7 03:06:06.326: %DOT11-4-TKIP_REPLAY: Client 7cc5.37fc.f8cd had 1 TKIP TSC replays

*Dec  7 03:08:45.326: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 7cc5.37fc.f8cd Reason: Previous authentication no longer valid

AP2

*Feb 17 09:49:55.577: %DOT11-6-ASSOC: Interface Dot11Radio0, Station   7cc5.37fc.f8cd Associated KEY_MGMT[WPA PSK]

*Feb 17 09:50:34.418: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 7cc5.37fc.f8cd Reason: Sending station has left the BSS

*Feb 17 09:51:45.826: %DOT11-6-ASSOC: Interface Dot11Radio0, Station   7cc5.37fc.f8cd Associated KEY_MGMT[WPA PSK]$11Radio0, Station   7cc5.37fc.f8cd Associated KEY_MGMT[WPA PSK]

*Feb 17 09:51:45.826: %DOT11-6-ASSOC: Interface Dot11Radio0, Station   7cc5.37fc^.f8cd Associated KEY_MGMT[WPA PSK]

*Feb 17 09:53:12.441: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 7cc5.37fc.f8cd Reason: Sending station has left the BSS

Many Thanks,

I have this problem too.
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Nicolas Darchis Tue, 01/11/2011 - 04:50

There are 2 differents reasons :

1) *Feb  17 09:53:12.441: %DOT11-6-DISASSOC: Interface Dot11Radio0,  Deauthenticating Station 7cc5.37fc.f8cd Reason: Sending station has left  the BSS

=> this means that the laptop went out of coverage

2) *Dec  7 03:06:06.326: %DOT11-4-TKIP_REPLAY: Client 7cc5.37fc.f8cd had 1 TKIP TSC replays

=> either this is an active attack or the client is incorrectly replaying packets

Nicolas

Scott Swist Fri, 01/21/2011 - 15:23

*Dec  7 03:08:45.326: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 7cc5.37fc.f8cd Reason: Previous authentication no longer valid

I have been chasing this error on some of the 1242 outdoor point to point links I have installed.  I had been thinking interference but if anyone else has had the same experience and has a better answer I'm open to suggestions.  The weird thing with this is that the radios do not re-establish the link without being manually forced by a carrier busy test or a reboot. Once one of those two things are done the link returns just as happy as it was before it went away.

Scott

Scott Swist Mon, 01/24/2011 - 11:40
George,
Not on that particullar one sorry...but it does happen with some frequency (no pattern) so i will post it as soon as I can pull some more logs.  However the same problem has occured on another point to point 1242 link that has been very stable untill this morning here are the logs for that:
Only found 3% interference on the channel that it had selected when I did the carrier busy test.  After the test it was set back to the same channel and has continue to work fine all day so far like I said no pattern here but the same Deauth error in the logs.
Non-Root
1000085: Jan 24 07:40:56.248 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to up
2000084: Jan 24 07:40:55.249 ESTErrorInterface Dot11Radio1, changed state to up
3000083: Jan 24 07:40:55.248 ESTWarningInterface Dot11Radio1, Associated To AP 8th_Turner_to_9 0021.5689.e680 [None WPAv2 PSK]
4000082: Jan 24 07:40:51.284 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to down
5000081: Jan 24 07:40:50.285 ESTErrorInterface Dot11Radio1, changed state to down
6000080: Jan 24 07:40:50.272 ESTWarningInterface Dot11Radio1, parent lost: Received deauthenticate (2) not valid
7000079: Jan 24 07:24:37.698 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to up
8000078: Jan 24 07:24:36.698 ESTErrorInterface Dot11Radio1, changed state to up
9000077: Jan 24 07:24:36.698 ESTWarningInterface Dot11Radio1, Associated To AP 8th_Turner_to_9 0021.5689.e680 [None WPAv2 PSK]
10000076: Jan 24 07:24:32.731 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to down
11000075: Jan 24 07:24:31.731 ESTErrorInterface Dot11Radio1, changed state to down
12000074: Jan 24 07:24:31.725 ESTWarningInterface Dot11Radio1, parent lost: Received deauthenticate (2) not valid
13000073: Jan 24 07:21:57.409 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to up
14000072: Jan 24 07:21:56.409 ESTErrorInterface Dot11Radio1, changed state to up
15000071: Jan 24 07:21:56.409 ESTWarningInterface Dot11Radio1, Associated To AP 8th_Turner_to_9 0021.5689.e680 [None WPAv2 PSK]
16000070: Jan 24 07:21:52.436 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to down
17000069: Jan 24 07:21:51.436 ESTErrorInterface Dot11Radio1, changed state to down
18000068: Jan 24 07:21:51.420 ESTWarningInterface Dot11Radio1, parent lost: Received deauthenticate (2) not valid
19000067: Jan 24 07:10:35.356 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to up
20000066: Jan 24 07:10:34.355 ESTErrorInterface Dot11Radio1, changed state to up

21000065: Jan 24 07:10:34.354 ESTWarningInterface Dot11Radio1, Associated To AP 8th_Turner_to_9 0021.5689.e680 [None WPAv2 PSK]
22000064: Jan 24 07:10:32.802 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to down
23000063: Jan 24 07:10:31.803 ESTErrorInterface Dot11Radio1, changed state to down
24000062: Jan 24 07:10:31.784 ESTWarningInterface Dot11Radio1, parent lost: Received deauthenticate (2) not valid
25000061: Jan 24 07:09:23.805 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to up
26000060: Jan 24 07:09:22.805 ESTErrorInterface Dot11Radio1, changed state to up
27000059: Jan 24 07:09:22.804 ESTWarningInterface Dot11Radio1, Associated To AP 8th_Turner_to_9 0021.5689.e680 [None WPAv2 PSK]
28000058: Jan 24 07:09:16.395 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to down
29000057: Jan 24 07:09:15.395 ESTErrorInterface Dot11Radio1, changed state to down
30000056: Jan 24 07:09:15.353 ESTWarningInterface Dot11Radio1, parent lost: Received deauthenticate (2) not valid
31000055: Jan 24 06:57:34.118 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to up
32000054: Jan 24 06:57:33.117 ESTErrorInterface Dot11Radio1, changed state to up
33000053: Jan 24 06:57:33.117 ESTWarningInterface Dot11Radio1, Associated To AP 8th_Turner_to_9 0021.5689.e680 [None WPAv2 PSK]
34000052: Jan 24 06:57:24.295 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to down
35000051: Jan 24 06:57:23.296 ESTErrorInterface Dot11Radio1, changed state to down

Root

1000069: Jan 24 07:40:55.245 ESTInformationInterface Dot11Radio1, Station 9th_Turner_to_8 0024.98a9.adf0 Reassociated KEY_MGMT[WPAv2 PSK]
2000068: Jan 24 07:40:50.267 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
3000067: Jan 24 07:40:50.265 ESTInformationInterface Dot11Radio1, Deauthenticating Station 0024.98a9.adf0 Reason: Previous authentication no longer valid
4000066: Jan 24 07:40:50.265 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
5000065: Jan 24 07:24:36.697 ESTInformationInterface Dot11Radio1, Station 9th_Turner_to_8 0024.98a9.adf0 Reassociated KEY_MGMT[WPAv2 PSK]
6000064: Jan 24 07:24:31.725 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
7000063: Jan 24 07:24:31.723 ESTInformationInterface Dot11Radio1, Deauthenticating Station 0024.98a9.adf0 Reason: Previous authentication no longer valid
8000062: Jan 24 07:24:31.723 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
9000061: Jan 24 07:21:56.411 ESTInformationInterface Dot11Radio1, Station 9th_Turner_to_8 0024.98a9.adf0 Reassociated KEY_MGMT[WPAv2 PSK]
10000060: Jan 24 07:21:51.422 ESTInformationInterface Dot11Radio1, Deauthenticating Station 0024.98a9.adf0 Reason: Previous authentication no longer valid
11000059: Jan 24 07:21:51.421 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
12000058: Jan 24 07:10:34.357 ESTInformationInterface Dot11Radio1, Station 9th_Turner_to_8 0024.98a9.adf0 Reassociated KEY_MGMT[WPAv2 PSK]
13000057: Jan 24 07:10:31.788 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
14000056: Jan 24 07:10:31.785 ESTInformationInterface Dot11Radio1, Deauthenticating Station 0024.98a9.adf0 Reason: Previous authentication no longer valid
15000055: Jan 24 07:10:31.785 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
16000054: Jan 24 07:09:22.796 ESTInformationInterface Dot11Radio1, Station 9th_Turner_to_8 0024.98a9.adf0 Reassociated KEY_MGMT[WPAv2 PSK]
17000053: Jan 24 07:09:15.345 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
18000052: Jan 24 07:09:15.343 ESTInformationInterface Dot11Radio1, Deauthenticating Station 0024.98a9.adf0 Reason: Previous authentication no longer valid
19000051: Jan 24 07:09:15.343 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
20000050: Jan 24 06:57:33.079 ESTInformationInterface Dot11Radio1, Station 9th_Turner_to_8 0024.98a9.adf0 Reassociated KEY_MGMT[WPAv2 PSK]

21000049: Jan 24 06:57:31.402 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to up
22000048: Jan 24 06:57:30.402 ESTErrorInterface Dot11Radio1, changed state to up
23000047: Jan 24 06:57:20.091 ESTNotificationLine protocol on Interface Dot11Radio1, changed state to down
24000046: Jan 24 06:57:19.091 ESTNotificationInterface Dot11Radio1, changed state to reset
25000045: Jan 24 06:00:57.343 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
26000044: Jan 24 06:00:57.340 ESTInformationInterface Dot11Radio1, Deauthenticating Station 0024.98a9.adf0 Reason: Previous authentication no longer valid
2757.340 ESTWarningPacket to client 0024.98a9.adf0 reached max retries, removing the client
Vinay Sharma Sat, 09/03/2011 - 05:55

Hello Christopher,

Please mark the Question as Answered, if the provided information is correct and it helped. By doing that others can take benefit as well.

Thanks,

Vinay Sharma

Community Manager – Wireless


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Posted January 11, 2011 at 2:04 AM
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