Dell PowerConnect 5548 User Guide - Page 93

Port Security Network security can be enhanced by limiting access on a port to users with specific MAC addresses. The MAC addresses can be dynamically learned, or they can be statically configured. Port security has the following modes: • Classic Lock - Locked port security monitors both received and learned packets that are received on specific ports. Access to the locked port is limited to users with specific MAC addresses. These addresses are either manually defined on the port, or learned on that port before it was locked. • Limited Dynamic Lock - When a packet is received on a locked port, and the packet's source MAC address is not tied to that port (either it was learned on a different port, or it is unknown to the system), a protection mechanism, which provides various options is invoked. Unauthorized packets arriving to a locked port are either: - Forwarded - Discarded with no trap - Discarded with a trap - The port is shutdown Locked port security enables storing a list of MAC addresses in the configuration file. The MAC addresses are restored when the device is reset. Disabled ports can be activated from the Port Configuration page. Dell PowerConnect 55xx Systems User Guide 93