CISCO Aironet access point - not able to connect by user.

Hi,
I have CISCO Aironet access point C1130 in my network , but not able to connect by users, I can see below logs from access point. please help on this.
Jun 13 17:50:10.686: RADIUS: no sg in radius-timers: ctx 0x10653F8 sg 0x0000
Jun 13 17:50:10.686: RADIUS: Retransmit to (20.33.100.11:1645,1646) for id 1645/247
Jun 13 17:50:15.678: RADIUS: no sg in radius-timers: ctx 0x10653F8 sg 0x0000
Jun 13 17:50:15.678: RADIUS: Retransmit to (20.33.100.11:1645,1646) for id 1645/247
Jun 13 17:50:20.544: RADIUS: no sg in radius-timers: ctx 0x10653F8 sg 0x0000
Jun 13 17:50:20.544: RADIUS: Retransmit to (20.33.100.11:1645,1646) for id 1645/247
Jun 13 17:50:24.832: RADIUS: no sg in radius-timers: ctx 0x10653F8 sg 0x0000
Jun 13 17:50:24.832: RADIUS: Retransmit to (20.33.100.11:1645,1646) for id 1645/247
Jun 13 17:50:29.741: RADIUS: no sg in radius-timers: ctx 0x10653F8 sg 0x0000
Jun 13 17:50:29.741: RADIUS: Fail-over denied to (20.33.100.11:1645,1646) for id 1645/247
Jun 13 17:50:29.741: RADIUS: No response from (20.33.100.11:1645,1646) for id 1645/247
Jun 13 17:50:29.741: RADIUS/DECODE: No response from radius-server; parse response; FAIL
Jun 13 17:50:29.741: RADIUS/DECODE: Case error(no response/ bad packet/ op decode);parse response; FAIL
Jun 13 17:50:29.741: dot11_auth_dot1x_parse_aaa_resp: Received server response: FAILOVER_RETRY
Jun 13 17:50:29.742: dot11_auth_dot1x_parse_aaa_resp: found eap pak in server response
Jun 13 17:50:29.742: Client 5864.6c67.3718 failed: EAP reason 0
Jun 13 17:50:29.742: dot11_auth_dot1x_parse_aaa_resp: Failed client 5894.6b37.3518 with aaa_req_status_detail 0
Jun 13 17:50:29.742: dot11_auth_dot1x_run_rfsm: Executing Action(SERVER_WAIT,SERVER_FAIL) for 5894.6b37.3518
Jun 13 17:50:29.742: dot11_auth_dot1x_send_response_to_client: Forwarding server message to client 5894.6b37.3518
Jun 13 17:50:29.742: dot11_auth_dot1x_send_response_to_client: Started timer client_timeout 30 seconds
Jun 13 17:50:29.743: dot11_auth_dot1x_send_client_fail: Authentication failed for 5894.6b37.3518
Jun 13 17:50:29.743: %DOT11-7-AUTH_FAILED: Station 5894.6b37.3518 Authentication failed
Regards,

Hi Niham,
You can try few things to troubleshoot this -
1. check the reachability of Radius server from your wlc (ping).
2. verify the IP address of Raduis server configured on wlc.
3. wlc in the Radius server ?
4. Shared Secret must be same on wlc and in raduis server.
Plz do not forget to rate useful post.
Thanks

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http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
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~~~~~~~~~~~~~~~~~~~~~~~
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~~~~~~~~~~~~~~~
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~~~~~~~~~~~~~~~~~~~~~~~~~
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http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
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~~~~~~~~~~~~~~~~~~~~~~~
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http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
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http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
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iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
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https://discussions.apple.com/thread/4010130
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~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

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Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at
http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are drooping internet connection)
    •    Launch Settings app
    •    Tap on Wi-Fi
    •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
    •    In the window that opens, tap on the Renew Lease button
6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
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Fix WiFi Issue for iOS 7
http://ipadnerds.com/fix-wifi-issue-ios-7/
iOS 6 Wifi Problems/Fixes
Wi-Fi Fix for iOS 6
https://discussions.apple.com/thread/4823738?tstart=240
How To: Workaround iPad Wi-Fi Issues
http://www.theipadfan.com/workaround-ipad-wifi-issues/
Another Fix For iOS 6 WiFi Problems
http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
iPad: Issues connecting to Wi-Fi networks
http://support.apple.com/kb/ts3304
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.hmL
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Signal.htm
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
10 Ways to Boost Your Wireless Signal
http://www.pcmag.com/article2/0,2817,2372811,00.asp
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
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If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

CISCO Aironet access point - not able to connect by user.

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