WLC 5508 : WPA2 enabled SSID - especially Intel & Dell wireless cards are not getting connected

Hi ,
I have one pecular issue in my wireless lan set-up. I have some laptop users who are using below inbuilt wireless adapter/cards :
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1 ) Dell wireless 1397 WLAN Minicard
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2 ) Intel Centrino Advanced N6200 AGN
above card are having issue with WPA2 enabled ssid connecitivity. strange is , the same users are getting connected to other wep enabled SSID but its not working for WPA2 SSID.
I have external ACS server which is used for radius authentication. Last time I had put same query in support forum did some workaround.
eq. disabling DHCP proxy option in WLC and moving all DHCP scope in external server.
After doing this workaround this mentioned users are still facing issue. I gone through some cisco document and some forums and came across that there is something to be done in " Session Timed Out "  optionin WLC
which is default 1800 sec based on that I tried to capture debug outputs for mentioned above problematic clients and user who is working fine .
I gone through the same debug output  and observed :
User who is working fine :
Processing Access-Accept for mobile 00:22:5f:8d:55:84
00:xx:xx:xx:xx:xx Setting re-auth timeout to 1800 seconds, got from WLAN config.
00:xx:xx:xx:xx:xx Station 00:22:5f:8d:55:84 setting dot1x reauth timeout = 1800
00:xx:xx:xx:xx:xx Creating a PKC PMKID Cache entry for station 00:22:5f:8d:55:84 (RSN 2)
00:xx:xx:xx:xx:xx Adding BSSID 00:1f:ca:2c:f3:01 to PMKID cache for station 00:22:5f:8d:55:84
New PMKID: (16)
The User /  card which is having issue :
Processing Access-Accept for mobile 00:22:5f:90:a2:ac
00:xx:xx:xx:xx:xx Setting re-auth timeout to 0 seconds, got from WLAN config.
00:xx:xx:xx:xx:xx Station 00:22:5f:90:a2:ac setting dot1x reauth timeout = 0
00:xx:xx:xx:xx:xx Stopping reauth timeout for 00:22:5f:90:a2:ac
00:xx:xx:xx:xx:xx Creating a PKC PMKID Cache entry for station 00:22:5f:90:a2:ac (RSN 2)
00:xx:xx:xx:xx:xx Adding BSSID 00:26:cb:1d:fe:31 to PMKID cache for station 00:22:5f:90:a2:ac
  New PMKID: (16)
Please suggest me to do workaround.

Hi,
According to output of working as well as not working wireless cards ,
below is my observations :
Not working wireless cards observation :
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The client passed the L2 authentication and that, after successful association, it is now going into the DHCP_REQD state
Not-working wirelss card :
*Apr 06 11:58:15.866: 0c:60:76:3e:8c:49 10.10.232.137 RUN (20) Successfully plumbed mobile rule (ACL ID 255)
*Apr 06 11:58:15.866: 0c:60:76:3e:8c:49 Stopping retransmission timer for mobile 0c:60:76:3e:8c:49
*Apr 06 11:58:15.869: 0c:60:76:3e:8c:49 10.10.232.137 Added NPU entry of type 1, dtlFlags 0x0
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The client entry is added to the Network Processing Unit (NPU) of the controller with an IP address of  10.10.232.137 but after that , I am getting below output
*Apr 06 11:58:22.742: 0c:60:76:3e:8c:49 Copy AP LOCP - mode:0 slotId:0, apMac 0x0:1f:ca:2c:ea:e0
*Apr 06 11:58:22.742: 0c:60:76:3e:8c:49 Copy WLAN LOCP EssIndex:2 aid:50 ssid:USTRI_SECURE
*Apr 06 11:58:22.742: 0c:60:76:3e:8c:49 Copy Security LOCP ecypher:0x0 ptype:0x2, p:0x0, eaptype:0x2 w:0x1 aalg:0x0, PMState:        RUN
*Apr 06 11:58:22.742: 0c:60:76:3e:8c:49 Copy 802.11 LOCP a:0x0 b:0x0 c:0x0 d:0x0 e:0x1 protocol2:0x3 statuscode 0, reasoncode 99, status 3
*Apr 06 11:58:22.742: 0c:60:76:3e:8c:49 Copy Username LOCP :   U25744
*Apr 06 11:58:22.743: 0c:60:76:3e:8c:49 Copy IP LOCP: 0xa0ae889
*Apr 06 11:58:22.743: 0c:60:76:3e:8c:49 Copy CCX LOCP 4
*Apr 06 11:58:22.743: 0c:60:76:3e:8c:49 Copy MobilityData LOCP status:1, anchorip:0x0
*Apr 06 11:59:14.002: 0c:60:76:3e:8c:49 10.10.232.137 RUN (20) State Update from Mobility-Complete to Mobility-Incomplete
*Apr 06 11:59:14.002: 0c:60:76:3e:8c:49 Clearing Address 10.10.232.137 on mobile
*Apr 06 11:59:14.002: 0c:60:76:3e:8c:49 10.10.232.137 RUN (20) Change state to DHCP_REQD (7) last state RUN (20)
*Apr 06 11:59:14.002: 0c:60:76:3e:8c:49 apfMmProcessDeleteMobile (apf_mm.c:522) Expiring Mobile!
*Apr 06 11:59:14.002: 0c:60:76:3e:8c:49 apfMsExpireMobileStation (apf_ms.c:4427) Changing state for mobile 0c:60:76:3e:8c:49 on AP 00:1f:ca:2c:ea:e0 from Associated to Disassociated.
working cards ouput :
*Apr 06 12:16:28.038: 00:22:5f:8d:55:84 10.10.232.190 RUN (20) Successfully plumbed mobile rule (ACL ID 255)
*Apr 06 12:16:28.038: 00:22:5f:8d:55:84 Stopping retransmission timer for mobile 00:22:5f:8d:55:84
*Apr 06 12:16:28.042: 00:22:5f:8d:55:84 10.10.232.190 Added NPU entry of type 1, dtlFlags 0x0
The client entry is added to the Network Processing Unit (NPU) of the controller with an IP address of  10.10.232.190  and as expected  , I am getting below output
*Apr 06 12:16:28.749: 00:22:5f:8d:55:84 DHCP received op BOOTREQUEST (1) (len 321, port 29, encap 0xec03)
*Apr 06 12:16:28.751: 00:22:5f:8d:55:84 DHCP processing DHCP REQUEST (3)
*Apr 06 12:16:28.751: 00:22:5f:8d:55:84 DHCP   op: BOOTREQUEST, htype: Ethernet, hlen: 6, hops: 0
*Apr 06 12:16:28.752: 00:22:5f:8d:55:84 DHCP   xid: 0x6eefbbb8 (1861204920), secs: 0, flags: 0
*Apr 06 12:16:28.752: 00:22:5f:8d:55:84 DHCP   chaddr: 00:22:5f:8d:55:84
*Apr 06 12:16:28.752: 00:22:5f:8d:55:84 DHCP   ciaddr: 10.10.232.190,  yiaddr: 0.0.0.0
*Apr 06 12:16:28.752: 00:22:5f:8d:55:84 DHCP   siaddr: 0.0.0.0,  giaddr: 0.0.0.0
*Apr 06 12:16:28.753: 00:22:5f:8d:55:84 DHCP successfully bridged packet to DS
*Apr 06 12:16:30.751: 00:22:5f:8d:55:84 Copy AP LOCP - mode:0 slotId:0, apMac 0x0:1f:ca:2c:f3:0
*Apr 06 12:16:30.751: 00:22:5f:8d:55:84 Copy WLAN LOCP EssIndex:2 aid:10 ssid:USTRI_SECURE
*Apr 06 12:16:30.751: 00:22:5f:8d:55:84 Copy Security LOCP ecypher:0x0 ptype:0x2, p:0x0, eaptype:0x2 w:0x1 aalg:0x0, PMState:        RUN
*Apr 06 12:16:30.752: 00:22:5f:8d:55:84 Copy 802.11 LOCP a:0x0 b:0x0 c:0x0 d:0x0 e:0x1 protocol2:0x3 statuscode 0, reasoncode 99, status 3
*Apr 06 12:16:30.752: 00:22:5f:8d:55:84 Copy Username LOCP : USTR\U17967
*Apr 06 12:16:30.752: 00:22:5f:8d:55:84 Copy IP LOCP: 0xa0ae8be
*Apr 06 12:16:30.752: 00:22:5f:8d:55:84 Copy CCX LOCP 4
*Apr 06 12:16:30.752: 00:22:5f:8d:55:84 Copy MobilityData LOCP status:1, anchorip:0x0
Finally client is getting stuck with DHCP-REQD state ..................
Please look into this and put light on this ............

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