Hieu Cao Fri, 01/23/2009 - 22:01
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From your switch name, I am assuming that you're using 3550 model.


Check out this link.


http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_9_ea1/configuration/guide/swtrafc.html#wp1042596


protect-When the number of port secure MAC addresses reaches the maximum limit allowed on the port, packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses to drop below the maximum value.


•restrict-A port security violation restricts data and causes the SecurityViolation counter to increment.


•shutdown-The interface is error-disabled when a security violation occurs.


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