Cisco Wireless :: WLC5508 - Client Cannot Get IP From Ex DHCP

Feb 4, 2013

I have a WLC5508 , we are using external DHCP for WLANs
one WLAN is able to get IP  from DHCP server but another WLAN not , the DHCP server is same , only 2 different scopes.
This is debug
*DHCP Socket Task: Feb 05 21:26:43.106: e8:06:88:9b:a8:04 DHCP received op BOOTREQUEST (1) (len 308,vlan 1, port 1, encap 0xec03)
*DHCP Socket Task: Feb 05 21:26:43.106: e8:06:88:9b:a8:04 DHCP processing DHCP


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Cisco Wireless :: WLC5508 Client Can't Get Its IP

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I'm using WLC5508 /w 7.0..My client do not get its IP. Status shown "DHCP_REQD".I found in (Cisco Live) Troubleshooting Wireless LANs with Centralized Controllers  This related with Enable/Disable DHCP Proxy checkbox. I solved. with Enabling this.But,
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2) I guest, ver7.0 Disables this chechbox by default. Or not? I also have others two 7.2 boxes. Those are all Enabled.

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I attached a couple of screens from my WLC.
IOS is

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 wlc configs/ 
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-------------------------------- ---- -------- --------------- ------- ------ -----
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When I do a packet capture on the client I see it requesting dhcp but not getting any response from the server. When I do a dhcp debug on the client I see the same (see attached file).
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