1. 1 building
2. 6 floors
3. 8 1142 APs per floor
4. APs no more than 50' apart
5. 2 4404 WLCs
I have disabled all of the data rates below 48Mbps, set 48Mbps to Require, and set 54Mbps to Supported. After walking around and surveying the environment, these settings appear to be spot on. I am achieving a decent cell size with just the right amount of overlap.
As for the 802.11n configuration, the 2.4GHz and 5GHz frequencies are configured for 20MHz channels due the number of a/b/g clients. The plan is to phase these out for a/b/g/n clients over the next couple years. At some point down the road, we will enable the 40MHz channel width for the 5GHz frequency. Also, all M rates are currently enabled, WMM is enabled, and we are using WPA2 with AES encryption.
I am having a problem with 802.11n clients using the Intel ProSet. The clients will initially connect and obtain an IP address, but in a matter of seconds (usually after trying to send some data), it disconnects and things begin to hang up to the point where a reboot is necessary to properly restore it. This is happening on multiple laptops, and with both Dell and Lenovo machines. If you go into the driver and disable 802.11n, the client will connect. The problem is with the 802.11n functionality.
Prior to disabling the 24Mbps (set to Required) and 36Mbps (set to Supported), the clients were working without an issues.
Has anyone else experienced a similar issue? Has anyone been successful disabling all rates except for 48/54Mbps in an 802.11n deployment? What else might I be missing?
Due to change windows, we have not fully confirmed that the issue is with the data rates. Our next step will likely be to re-enable the 24/36Mbps data rates and see if the clients work without a hitch. The last thing we did prior to seeing this issue, however, was disabling these rates and rebooting the APs.
Thanks in advance,