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Devices kicked out (deauth, extensive data loss)  [SOLVED]

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dragonauta
newbie
Topic Author
Posts: 28
Joined: Thu Feb 02, 2017 12:50 am

Devices kicked out (deauth, extensive data loss)

Tue Aug 27, 2019 1:29 pm

Hi.
I have running a RB2011 as CAPsMAN and three RB951 as CAP.
I made two SSID: one for work and another for guests and cellphones (each one has its own dhcp server).
DL0-1, DL1-1, DL2-1 and DL3-1 are the work network (master configuration) and DL0-1-1, DL1-1-1, DL2-1-1, DL3-1-1 are the guest network (slave configuration)

Some users have reported disconnections, sometimes at a 5 minutes rate or less.
I explored the logs and I see (I filtered by this MAC and master config)
Code: Select all
Aug 26 07:15:55 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -68
Aug 26 07:15:57 router.lan dhcp,info dhcp1 assigned 10.0.0.124 to E4:02:9B:35:97:DD
Aug 26 08:11:36 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 reassociating
Aug 26 08:11:36 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -66
Aug 26 08:18:55 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -87
Aug 26 08:19:00 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 08:19:04 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, 4-way handshake timeout
Aug 26 08:19:08 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -69
Aug 26 08:19:14 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, 4-way handshake timeout
Aug 26 08:19:18 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -64
Aug 26 08:22:38 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 08:23:39 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -65
Aug 26 08:27:25 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 reassociating
Aug 26 08:27:25 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -66
Aug 26 08:27:25 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, received deauth: unspecified (1)
Aug 26 08:27:26 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -63
Aug 26 09:10:11 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, group key timeout
Aug 26 09:10:17 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -64
Aug 26 10:05:46 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 reassociating
Aug 26 10:05:46 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -65
Aug 26 10:50:09 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -89
Aug 26 10:50:15 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, 4-way handshake timeout
Aug 26 10:50:19 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 10:50:19 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -90
Aug 26 10:52:41 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -65
Aug 26 10:52:41 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, registered to other interface
Aug 26 11:18:48 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 11:18:48 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -62
Aug 26 11:24:29 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -89
Aug 26 11:24:29 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, registered to other interface
Aug 26 11:25:05 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, group key timeout
Aug 26 11:25:13 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -64
Aug 26 11:25:45 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -89
Aug 26 11:25:45 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 reassociating
Aug 26 11:25:45 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -89
Aug 26 11:25:45 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, registered to other interface
Aug 26 11:29:42 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -63
Aug 26 11:29:43 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, registered to other interface
Aug 26 11:31:25 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 11:31:31 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -58
Aug 26 11:34:32 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -90
Aug 26 11:34:32 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, registered to other interface
Aug 26 11:35:05 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, group key timeout
Aug 26 11:35:05 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -79
Aug 26 11:35:58 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -65
Aug 26 11:35:58 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, registered to other interface
Aug 26 12:03:01 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 12:04:01 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -59
Aug 26 13:33:59 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 13:36:41 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -61
Aug 26 14:02:54 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 14:06:01 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -63
Aug 26 14:10:11 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, group key timeout
Aug 26 14:10:12 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -64
Aug 26 14:10:18 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, 4-way handshake timeout
Aug 26 14:10:19 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -65
Aug 26 15:21:08 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 reassociating
Aug 26 15:21:08 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -73
Aug 26 15:21:22 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, received deauth: unspecified (1)
Aug 26 15:21:30 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -71
Aug 26 15:40:23 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 reassociating
Aug 26 15:40:23 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -69
Aug 26 15:47:48 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 connected, signal strength -90
Aug 26 15:47:48 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, registered to other interface
Aug 26 15:47:59 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -69
Aug 26 15:48:00 router.lan caps,info E4:02:9B:35:97:DD@DL0-1 disconnected, registered to other interface
Aug 26 15:53:33 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 reassociating
Aug 26 15:53:33 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -67
Aug 26 16:21:26 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 reassociating
Aug 26 16:21:26 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -67
Aug 26 16:26:43 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, extensive data loss
Aug 26 16:26:47 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -69
Aug 26 16:27:00 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, received deauth: unspecified (1)
Aug 26 16:27:16 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -68
Aug 26 16:27:29 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, received deauth: unspecified (1)
Aug 26 16:27:33 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 connected, signal strength -69
Aug 26 17:03:09 router.lan caps,info E4:02:9B:35:97:DD@DL3-1 disconnected, received deauth: unspecified (1)
Aug 26 17:12:34 router.lan dhcp,info dhcp1 deassigned 10.0.0.124 from E4:02:9B:35:97:DD
Sometimes it disconnects from an AP (DL3-1) and then tries another (DL0-1), but goes back to original
I see some disconnections because change of AP (low signal strenght)

This happens mostly with DL3-1 AP. It has around 15 laptops connected to it (and 15 cellphones to the guest wifi).

Today I will be researching for another WiFi signals, maybe I have interferences.
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dragonauta
newbie
Topic Author
Posts: 28
Joined: Thu Feb 02, 2017 12:50 am

Re: Devices kicked out (deauth, extensive data loss)

Tue Aug 27, 2019 2:35 pm

Sorry, I should have said that I have latest firmware (6.45.3) on all 4 devices.

To give a better picture of this scenary:
The building itself is a FFF faraday cage. 90% of inner walls are steel frame (dry wall).

The building has 3 floors, ground floor have Main AP (CAPsMAN) and 2 AP; second floor as a single AP.
I didn't set any frequency, so CAPsMAN is choosing the best channel
Code: Select all
side view of building
                                                        -----------------------
                                                        | AP3 (DL3)           | second floor
                                                        | 2412 (1)            |
                                                        -----------------------
                                                        |                     | first floor
                                                        |                     |
-------------------------------------------------------------------------------
| AP2 (DL2)                  AP1 (DL1)                    CAPsMAN (DL0)       | ground floor
| 2412 (1)                   2452 (9)                     2447 (8)            |
-------------------------------------------------------------------------------
People with issues are in second floor, there's no office in the first floor

EDITED: added frequecies and channels
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dragonauta
newbie
Topic Author
Posts: 28
Joined: Thu Feb 02, 2017 12:50 am

Re: Devices kicked out (deauth, extensive data loss)  [SOLVED]

Wed Sep 04, 2019 4:50 pm

Ok, I think I got this.
I set Channel 1 to all cAP through CAPsMAN. But some clients kept disconnecting.

So I installed a cheap Wifi USB (TL-WN725) and disabled the main wireless device on every notebook with issues.

Zero problem since!

I think that those clients disconnecting have problem with the wireless card. I'm looking for proper replacement.

Want to shre for solve/close this post.
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