Re: 1140's not broadcasting N speeds

jlight80911 · ‎10-20-2009

Just purchased a few 1140 cisco AP's with a 2106 Lan Controller. Configured everything as stated by the manual and I can not connect at N speeds. We have two buildings, in the other building on the same network we have a 2006 Lan controller that has 4 1130's configured.

So my issue at hand right now is I am not able to connect at the N speed. Could this be an issue from mixed mode? I am a little confused on where to start.

Thank you,

Robert.N.Barrett_2 · ‎10-20-2009

What is your WLAN config? You must be using WPA2/AES (or no encryption) to get the N speeds. Post a sanitized version of your controller config if you're not sure.

jlight80911 · ‎10-20-2009

Just enabled WP2 Encryption, and setup my laptop and it only put out 54 MBPS at Excellent strength. I have a Vaio u7600. So I do not think encryption is my issue here.

Robert.N.Barrett_2 · ‎10-20-2009

WPA2 with AES, right? Not TKIP, and not WPA and WPA2 at the same time.

What wireless NIC does your u7600 use? The Intel 4965? Are the drivers up to date? Is 802.11n enabled on the controller, and on the wireless NIC?

What code level are you running on the WLC?

jlight80911 · ‎10-20-2009

Correct, WPA2 with AES.

The Viao is running the Intel 4965AGN with updated drivers

The Controller is running 5.2.178.0 Code.

Robert.N.Barrett_2 · ‎10-20-2009

Can you sanitize the controller config and upload it here? Sounds like you've got everything set correctly. The only thing that might be causing a problem is that some 4965 cards had the 802.11n disabled. I think this was only on certain ThinkPads, though. You'd know, because the card would be listed in Device Manager as a 4965AG.

Also - are you using Intel PROSet, or Windows Wireless Zero Config? What OS are you running? If you are on XP SP2, did you apply the wireless update?

jlight80911 · ‎10-20-2009

I am running Windows Vista Business, running the windows Zero Config, I also have another Vaio running windows XP with the wireless update on it. I will try to get a config file and upload within the hour.

Robert.N.Barrett_2 · ‎10-20-2009

I don't suppose you have a wireless sniffer hanging around that can show you what speeds are being advertised in the beacons, do you?

jlight80911 · ‎10-20-2009

Unfortantly i do not, i tried netstubmler just now but it did not work. One thing i noticed under the WLC on the web GUI was that the Radio policy, it only gives you the option to do a/g, b/g, or all. Mines set to b/g, to my surprise shouldn't b/g/n be in the spot? It's under the WLAN options

Robert.N.Barrett_2 · ‎10-20-2009

Cisco doesn't support n-only configurations, so the radio policy is somewhat accurate. As you noticed, you can enable/disable 802.11n support on the 2.4GHz and 5GHz radios individually via the Wireless page.

I would like to see an "n-only" option as well, but Cisco doesn't see the logic that it would be great to have 802.11b/g on the 2.4GHz radio for legacy support, and use pure (aka Greenfield) mode for the 5GHz radio. In the US, this would make a lot of sense because many people have not deployed 802.11a. Other vendors, (cough..Motorola..cough..Aruba..cough), support Greenfield mode. Of course, these folks also support 3 x 3 MIMO, which Cisco does not plan on supporting any time soon, either.

jlight80911 · ‎10-20-2009

hmm ya iv pretty much just ripped apart my network now. 2006 is out of the picture, just the 2106 is connected, and being configured by WCS 5.2.148. I have two laptops thats are N capable, the vaio, and the Dell M6400 laptop. I will try to get the config file here soon and load it up. Can you explain why i have to use WAP2 with AES security? We just use simple mac filtering and do not broadcast our network. Thank you.