mkumailali,
Explanation directly from cisco - This message means that the switch has received ARP packets considered invalid by ARP inspection. The packets are erroneous, and their presence might show attempted man-in-the-middle attacks in the network. This message differs from other SW_DAI messages in that this message captures all messages when the rate of incoming packets exceeds the dynamic ARP inspection logging rate. [dec] is the number of invalid ARP packets, and [time-of-day] is the time of day.
Recommended Action No action is required.
Error Message SW_DAI-6-ACL_PERMIT