MAC address "Drop"

[ibrahim_hassan]

Dears,

         we configured 2960 switch with dot1x multi-domain authentication , suddenly the user lose its IP address and by entering "sh mac address-table interface fa x/x" i found

1 xxxx.xxxx.xxxx Drop

and some times found the same entry for IP phone in the data and Voice vlan , i treid to shut and no shut the port but with no change.

any advise please?

[ibrahim_hassan]

thanks i found it , it related to ISE .

ISE send drop in cace multipe failed attempts