7962 phones shutdown due to DOT1x violation

Hi experts,

I have a number of 7962 phones conneceted to my switch and register wilth
the CUCM correctly, but lately i noticed that the phones get offline
occassionally and sends the error messages below to the syslog.

"Jun 18 11:43:36 c07switch 101925: 2986524: Jun 18 11:43:36.352 EDT:
%DOT1X-SP-5-SECURITY_VIOLATION: Security violation on interface FastEthe

rnet4/9, New MAC address 6416.8d50.b5eb is seen on the interface in mode

Jun 18 11:43:36 c07switch 101926: 2986525: Jun 18 11:43:36.352 EDT:
%PM-SP-4-ERR_DISABLE: security-violation error detected on Fa4/9, puttin

g Fa4/9 in err-disable state."

*It's weird 'cos the only thing i think might casue this is a bridge between
voice and data traffic. Any one has any clue on this?*

**

Gbenga*.*

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Received on Tue Jun 22 2010 - 10:49:31 ART