[c-nsp] Interface in err-disable state

[Kotlica, Milovan]

Hi,
 
I have problem with one interface on Cisco 3750 switch. This interface
g1/0/16 is access mode vlan 47. It is connected on wireless device. But
somethimes i get this logg:
Feb  8 07:30:44: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on
GigabitEthernet1/0/16.
Feb  8 07:30:44: %PM-4-ERR_DISABLE: loopback error detected on Gi1/0/16,
putting Gi1/0/16 in err-disable state
Feb  8 07:30:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface
GigabitEthernet1/0/16, changed state to down
Feb  8 07:30:46: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/16,
changed state to down
and interface goes down.
 
I turned off spanning tree for vlan 47. What could be problem? Any help?
 
Thanks.
 
-------------------------------------------
Milovan Kotlica  
Chief Specialist for Network Security
 
T - Telecom of Montenegro 
Office: +381 81 432-122
Mobile: +381 67 821-183