10-21-2007 10:33 PM - edited 07-03-2021 02:48 PM
We are having a problem with around 10 Access Points in a hall on one site.
It would appear that clients are connecting to a close access point and then being disassociated from it, and connected to another access point that is distant with less signal strength
Our syslog servers are clearly showing this problem:
2007-10-16 11:44:22 Local7.Info 10.1.1.234 32: *Mar 2 01:31:25.822: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 0015.0035.c3ac Associated KEY_MGMT[WPA PSK]
2007-10-16 11:44:22 Local7.Warning 10.1.1.234 33: *Mar 2 01:31:26.110: %DOT11-4-MAXRETRIES: Packet to client 0015.0035.c3ac reached max retries, removing the client
2007-10-16 11:44:23 Local7.Info 10.1.1.235 52: *Mar 2 01:31:24.696: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 0015.0035.c3ac Reason: Sending station has left the BSS
2007-10-16 11:44:23 Local7.Info 10.1.1.234 34: *Mar 2 01:31:26.111: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 0015.0035.c3ac Reason: Previous authentication no longer valid
2007-10-16 11:44:24 Local7.Info 10.1.1.237 142: *Mar 2 01:31:27.652: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 0015.0035.c3ac Associated KEY_MGMT[WPA PSK]
2007-10-16 11:44:31 Local7.Warning 10.1.1.237 143: *Mar 2 01:31:35.438: %DOT11-4-MAXRETRIES: Packet to client 0015.0035.c3ac reached max retries, removing the client
2007-10-16 11:44:32 Local7.Info 10.1.1.237 144: *Mar 2 01:31:35.439: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 0015.0035.c3ac Reason: Previous authentication no longer valid
2007-10-16 11:44:34 Local7.Info 10.1.1.236 72: *Mar 2 01:31:35.275: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 0015.0035.c3ac Associated KEY_MGMT[WPA PSK]
Any help would be greatly appreciated.
10-22-2007 05:28 AM
A common interference problem. Can be averted
a) a proper site survey
b ) making it for sure that if you are using the b/g radio then you are using the non overlapping channels.
c) fiddling with the power.
10-22-2007 06:23 AM
I suspect that it is to do with noise between APs, and goes along with b)
The hallway is around 40-50m long and has 6 APs distributed like
x-------x---------x-----------x
---x---------x---------x-----------
They are in a 4 channel spread
There is no physical barrier between APs in the hallway, however another 7 ap's are in close vacinity in seperated rooms
07-17-2013 09:54 AM
1) check IOS ver: upgrade it
2) "packet retries 128 drop-packet" put this command on each radio interface
3) disable the TKIP authen if possible use aes-ccm
4) disable aironet extenstions
let me know if this helps
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