Wireless Connectivity Issue with 802.11n.

We have a 5508 Controller and sixteen 1142 APs.
Several of our laptops were experiencing connectivity issues over Wireless. Older laptops that do not support 11n are not having any problems.
I disabled 802.11n for both 'a' and 'b/g' in the Controller. Now the newer laptops connect with no issues.
They would in fact connect to the APs while 11n was available, just no Internet Access - (cannot ping DG, etc). Disabling/Enabling the laptop WL adapter would allow brief access (sometimes), but they'd quickly lose Internet Access once again.
Our WLANs are configured for WPA2/AES.
This looks like a 802.11n configuration issue at either the Controller or the Laptops (or both). Both are using the Default settings for 801.11n.
Any recommendations for correcting this? Are there best practice guidelines for configuring 802.11n?
Thanks.
- Jay

Configure 802.11n on the WLC
http://www.cisco.com/en/US/customer/products/ps6366/products_tech_note09186a0080a3443f.shtml

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A Gen2 TC is probably on its last gasp.. and it is well overdue for replacement.
If you want to get more life out of it you normally need to repair or replace the internal power supply.. This is not done by apple or any of their repair centres.
Just do ebay search and you will find sellers with replacement supplies.
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Hi BCLor!
Try using the suggested steps in the following article to help you troubleshoot this issue with your Wi-Fi connection:
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628
Thanks for being a part of the Apple Support Communities!
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Hi,
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Best regards
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Hi,
Thanks for the reply.
Ia using Network authentication as WPA2-Enterprise and Encryption type is AES.With this settings clients are not able to connect.It says wireless adapter is not connected.
Wanted to know any patch to be applied in windows vista to support WPA2.
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Solved!
Go to Solution.

08-Jul-2008 11:58 AM
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Daniel Jung Yoonho

Dear, Freerk.
Thank you for your information.
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ours is not able to do rebooting process so that, only the choice will be I must search testing result by my self... if you have a result from your lab, could you share with me?
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Web-auth support for Captive-Bypass will be enabled.
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Community:
How do you set up an
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Wireless Connectivity Issue with 802.11n.

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