WLC 5508 duplex mismatch error

Question

Hi I've got a WLC 5508 connected to a Catalyst 6000 switch. In the switch I've get a CDP duplex mismatch error every 30 min.
%CDP-4-DUPLEXMISMATCH:Full/half duplex mismatch detected on port 3/23
with the show port command I can see this:
Port  Name                 Status     Vlan       Duplex Speed       Type
3/23  WLC           connected  trunk        full        1000 10/100/1000
With the show CDP neigh I see a duplex mismatch
C6K9> (enable) sh cdp neig 3/23 detail
Port (Our Port): 3/23
Holdtime: 142 sec
Capabilities: HOST
Version:
  Manufacturer's Name: Cisco Systems Inc.  Product Name: Cisco Controller  Product Version: 7.0.116.0  RTOS Version: Erro  Bootloader Version: 1.0.1  Build Type: DATA + WPS
Platform: AIR-CT5508-K9
Port-ID (Port on Neighbors's Device): GigabitEthernet0/0/1
VTP Management Domain: unknown
Native VLAN: unknown
Duplex: half (Mismatch)
But in the WLC console there is not half duplex
(WLC5508) show>port 1
           STP   Admin   Physical   Physical   Link   Link
Pr  Type   Stat   Mode     Mode      Status   Status  Trap     POE    SFPType  
1  Normal  Forw Enable  Auto       1000 Full  Up     Enable  N/A     1000BaseTX
I don't have errors in the port counters
How I can resolve this duplex mismatch?

Answer 1

Try upgrading the firmware of the WLC to 7.0.230.0.