- Bronze, 100 points or more
I'm having a wireless problem with one of the sites I have to support. Before anyone scolds me about a site survey ;-)
We sort of inherited this setup from the customer when we took over their network and it never really has worked correctly. I'm trying to avoid telling them to hardwire their PCs.
The site is a Manufacturing facility with a corrugated metal roof, 25 ft cielings and large power transformers. There are two access-points that serve the manufacturing floor, one on either side of the building mounted about 10ft off the ground on poles. There's another access-point that serves the lobby and conference room, for a grand total of 3 APs. All three APs are Model: AIR-AP1231G-A-K9 with (I believe, I havent actually been to the site) stock antennas. The APs are all connected to the same switch with the same VLANs (One for Guests [internet only] and one for internal clients).
As for security, the clients authenticate via Certificates that are verified with the Radius Server / Active Directory.
The issue is that clients tend to not stay associated with their AP, they roam from AP to AP. Is there any way to keep clients (Intel Wireless cards for the most part) from roaming to another AP? Is there somthing I can configure on the APs to make them stick? We've tried adjusting power on the APs as well as different antennas (Directional vs omni).
Here's a sample of what we get from the logs:
Aug 24 14:41:54.608: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 0018.391a.abe4 Associated KEY_MGMT[NONE]
Aug 24 14:44:48.438: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 0004.2399.b809 Associated KEY_MGMT[NONE]
Aug 24 15:07:07.773: %DOT11-6-ROAMED: Station 000f.3da9.fa87 Roamed to 0012.0019.9700
Aug 24 15:07:07.773: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 000f.3da9.fa87
Aug 24 15:08:08.767: %DOT11-4-MAXRETRIES: Packet to client 0018.391a.abe4 reached max retries, removing the client
Aug 24 15:08:08.767: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 0018.391a.abe4 Reason: Previous authentication no longer valid
Aug 24 15:08:12.934: %DOT11-6-ASSOC: Interface Dot11Radio0, Station 0018.391a.abe4 Associated KEY_MGMT[NONE]
To me it looks like interference issues because I'm seeing quite a few output errors on the radios. Any Ideas how I can fix this problem? Thanks!