I am the Wireless engineer for a large retailer in Michigan and recently we deployed the Cisco 4404 LWAPP controllers at our corporate campus. We support the following clients on our access points
802.11B, 802.11G and we are currently adding 802.11n clients.
The problem we are having has to do with the N client specifically. The wireless client stays connected, but the laptop will intermittently disconnect for 8 to 10 seconds and you can see this when performing a constant ping test. The client for some reason no longer communicates with the network and then re-establishes connection. The same clients if they are moved to an SSID that is configured for G only, does not have this problem on the same infrastructure. The only difference between the 2 ssids is that one is setup for WPA2 with AES encryption and the other is setup for 802.1x and LEAP auth.
Windows Multimedia Mode is enabled on the N ssid and we have pretty much disabled all other options within the WLAN configuration to strip this back to the bare minimum. We also have another ssid that has no encryption on it, and the same N clients still experience the same problems.
The laptops in question have the Intel Wifi LInk 5100 wireless card installed and are running windows xp with the latest 12.4 driver set.
The controllers have version 5.2.198.0 code installed.
The model of access point is the Cisco Aironet 1252 running the lightweight code on it.
If there is any additional information needed, please feel free to email me back.
Mark C. Greenwood, CNE, CCNA, BICSI II
With more than 16 years experience to share.
802.11B, 802.11G and we are currently adding 802.11n clients.
The problem we are having has to do with the N client specifically. The wireless client stays connected, but the laptop will intermittently disconnect for 8 to 10 seconds and you can see this when performing a constant ping test. The client for some reason no longer communicates with the network and then re-establishes connection. The same clients if they are moved to an SSID that is configured for G only, does not have this problem on the same infrastructure. The only difference between the 2 ssids is that one is setup for WPA2 with AES encryption and the other is setup for 802.1x and LEAP auth.
Windows Multimedia Mode is enabled on the N ssid and we have pretty much disabled all other options within the WLAN configuration to strip this back to the bare minimum. We also have another ssid that has no encryption on it, and the same N clients still experience the same problems.
The laptops in question have the Intel Wifi LInk 5100 wireless card installed and are running windows xp with the latest 12.4 driver set.
The controllers have version 5.2.198.0 code installed.
The model of access point is the Cisco Aironet 1252 running the lightweight code on it.
If there is any additional information needed, please feel free to email me back.
Mark C. Greenwood, CNE, CCNA, BICSI II
With more than 16 years experience to share.
