does that also happen when you use the Web GUI (page 7 in the attached guide) ?
Also, make sure you are running the latest firmware version, release 220.127.116.11...
Please check the following link:
check if auto smart port and smartport macros are enabled. To disable these features, type:
macro auto disable
interface range gi1-20
no macro auto smartport
It seems the "smart port" accidentally kicks off. Turn it off by typing these commends:
macro auto disabled
no macro auto processing cdp
no macro auto processing lldp
macro auto processing type ip_phone disabled
macro auto processing type ip_phone_desktop disabled
macro auto processing type switch disabled
macro auto processing type ap disabled
voice vlan state disabled