Ap dissociating clients

mx · ‎11-06-2007

I have a 1231 that has about 5 G clients that talk to it, but they keep dissociating. Code is latest rev and that didnt help. There is only 1 access point in the area and a survey shows no other interference. There is no authentication, just mac address list on the AP. Here is part of the log:

1 000041: *Nov 6 22:42:00.000 Information

System clock has been updated from 19:37:29 Eastern Thu Feb 28 2002 to 17:42:00 Eastern Tue Nov 6 2007, configured from console by amentaj on vty0 (10.0.101.143).

2 000040: *Mar 1 00:32:10.962 Information

Interface Dot11Radio0, Deauthenticating Station 0019.d2ab.79d2 Reason: Previous authentication no longer valid

3 000039: *Mar 1 00:23:10.452 Information

Interface Dot11Radio0, Station AP01EDARTHFD 0019.d2ab.79d2 Associated KEY_MGMT[NONE]

4 000038: *Mar 1 00:23:10.175 Information

Interface Dot11Radio0, Deauthenticating Station 0019.d2ab.79d2 Reason: Sending station has left the BSS

5 000037: *Mar 1 00:21:49.014 Information

Interface Dot11Radio0, Station AP01EDARTHFD 0019.d2ab.79d2 Reassociated KEY_MGMT[NONE]

6 000036: *Mar 1 00:21:34.284 Information

Interface Dot11Radio0, Station 000e.3553.7c01 Associated KEY_MGMT[NONE]

7 000035: *Mar 1 00:21:33.773 Information

Interface Dot11Radio0, Deauthenticating Station 000e.3553.7c01 Reason: Sending station has left the BSS

8 000034: *Mar 1 00:19:10.461 Information

Interface Dot11Radio0, Station 000e.3553.7c01 Associated KEY_MGMT[NONE]

9 000033: *Mar 1 00:08:01.960 Information

Interface Dot11Radio0, Deauthenticating Station 000e.35c1.8385 Reason: Previous authentication no longer valid

10 000032: *Mar 1 00:03:24.023 Information

Interface Dot11Radio0, Station 0014.bf77.f6d3 Associated KEY_MGMT[NONE]

11 000031: *Mar 1 00:03:23.777 Information

Interface Dot11Radio0, Station 0014.bf77.f700 Associated KEY_MGMT[NONE]

12 000030: *Mar 1 00:03:23.542 Information

Interface Dot11Radio0, Station 0014.bf77.f78f Associated KEY_MGMT[NONE]

13 000029: *Mar 1 00:03:23.338 Information

Interface Dot11Radio0, Station 0014.bf77.f6cb Associated KEY_MGMT[NONE]

14 000028: *Mar 1 00:03:19.995 Information

Interface Dot11Radio0, Station 000e.35c1.8385 Associated KEY_MGMT[NONE]

15 000027: *Mar 1 00:03:19.750 Error

Interface Dot11Radio0, changed state to up

16 000026: *Mar 1 00:03:19.446 Notification

Interface Dot11Radio0, changed state to reset

17 000025: *Mar 1 00:03:19.423 Error

Interface Dot11Radio0, changed state to down

18 000024: *Mar 1 00:03:19.421 Information

Interface Dot11Radio0, Deauthenticating Station 0014.bf77.f6cb Reason: Previous authentication no longer valid

19 000023: *Mar 1 00:03:19.421 Information

Interface Dot11Radio0, Deauthenticating Station 0014.bf77.f78f Reason: Previous authentication no longer valid

20 000022: *Mar 1 00:03:19.421 Information

Interface Dot11Radio0, Deauthenticating Station 0014.bf77.f700 Reason: Previous authentication no longer valid

andrew.brazier · ‎11-09-2007

What type of clients are they? Wireless card make/model?

mx · ‎11-09-2007

Im sorry, I should have mentioned that, I apologize, they are Linksys WMP54G adaptors.

stephenbash · ‎11-09-2007

I am having that exact same issue. I have a Aironet 1240AG. It is about 20,000 sq. ft. that this AP covers. It is the only AP in the building, and there isn't any measurable interference.

The client is running XP SP2 with Linksys WMP54G card running driver version 1.0.3.0. Here is a portion of the log file on the AP.

Nov 9 07:18:06.830: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating

Station 001c.106a.1ff8 Reason: Sending station has left the BSS

Nov 9 07:18:17.022: %DOT11-7-AUTH_FAILED: Station 001c.106a.1ff8 Authentication

failed

Nov 9 07:39:47.915: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 001c.106a.

1ff8 Associated KEY_MGMT[WPA PSK]

Nov 9 09:46:50.971: %DOT11-4-MAXRETRIES: Packet to client 001c.106a.1ff8 reached max retries, removing the client

Nov 9 09:46:50.971: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating

Station 001c.106a.1ff8 Reason: Previous authentication no longer valid

Nov 9 09:47:12.786: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 001c.106a.

1ff8 Associated KEY_MGMT[WPA PSK]

Nov 9 10:03:29.438: %DOT11-4-MAXRETRIES: Packet to client 001c.106a.1ff8 reached max retries, removing the client

Nov 9 10:03:29.439: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating

Station 001c.106a.1ff8 Reason: Previous authentication no longer valid

Nov 9 10:03:51.390: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 001c.106a.

1ff8 Associated KEY_MGMT[WPA PSK]

Nov 9 10:09:35.543: %DOT11-4-MAXRETRIES: Packet to client 001c.106a.1ff8 reached max retries, removing the client

Nov 9 10:09:35.543: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating

Station 001c.106a.1ff8 Reason: Previous authentication no longer valid

Nov 9 10:09:59.117: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 001c.106a.

1ff8 Associated KEY_MGMT[WPA PSK]

Nov 9 15:04:00.934: %DOT11-4-MAXRETRIES: Packet to client 001c.106a.1ff8 reache

d max retries, removing the client

My AP is running 12.3 (8)

andrew.brazier · ‎11-09-2007

I know it's a bit obvious but as well as updating the AP IOS have you updated the Linksys drivers? Also, set the preamble in the wireless interface settings to "long".

stephenbash · ‎11-09-2007

Thank you for the reply. I set the AP preamble to LONG. The client shut off the PC so I will have to test it on Monday. It's at a remote office.

raycourtney · ‎11-15-2007

This sounds like a problem i keep having. Did you guys find an answer to this?

stephenbash · ‎11-15-2007

I'm still working on it. I haven't found a solution yet.

mx · ‎11-15-2007

I did two things over the last couple of days that seemed to have fixed the issue for me. Although Im not sure which one actually fixed it.....

1) I replaced the AP with another one. Copy/paste the config in so they were identical

2) I took out the 2 1756 (I think) big omni antennas and put in 2 rubber duck 4949 antennas. I was in a fairly small metal garage (maybe 8000 square feet) and I thought that maybe too much signal was creating issues with multipath. The antennas were in diversity mode.

Either way, its been rock solid since last friday.

hth

bob

stephenbash · ‎11-15-2007

I'll have to see if I can turn down the power on the antenna's that I have. I am serving out about 26,000 sq. ft. but I have LOS to the clients and none of the product is stacked very high at all. It is a metal building so I might have signal reflection issues as well.