HP ProCurve 6200yl Series Access Security Manual page 329

Syntax: port-security (Continued)
clear-intrusion-flag
Clears the intrusion flag for a specific port. (See "Reading
Intrusion Alerts and Resetting Alert Flags" on page
11-34.)
no port-security <port-list> mac-address <mac-addr> [<mac-addr>
<mac-addr>]
Removes the specified learned MAC address(es) from the
specified port.
Configuring and Monitoring Port Security
Port Security
11-17