1. Port disabling function
(1) Disable port 5. Port 5 cannot learn the MAC address.
(2) Send a packet from port 6 to port 5. All the ports can receive the packet.
(3) Send a packet from port 5 to port 6. Port 6 can receive the packet, but other ports cannot receive the
packet.
(4) Add a static MAC address to port 5. The static MAC address is added successfully. PCs that use or
do not use the MAC address can communicate normally with other ports, and can successfully ping the
management IP address of the switch. Send a packet from the PC connected to port 6 to the PC
connected to port 5. The packet is a unicast packet. The PC using this MAC address is connected to
another port, and cannot communicate with the switch.
Summary: The port disabling function prohibits a port from automatically learning the dynamic MAC
address, but the port can learn the static MAC address. This function does not affect data sending and
receiving on the port.
2. Security function
(1) Set port 5 to the secure mode. Port 5 cannot learn the MAC address.
(2) Send a packet from the PC connected to port 6 to the PC connected to port 5. The packet is
processed as an unknown unicast packet and is broadcast.
(3) Send packets from the PC connected to port 5 to the PC connected to port 6. All the packets are
filtered and dropped by port 5.
(4) Add a static MAC address to port 5. The static MAC address is added successfully. The PC using
this MAC address can communicate normally with other ports. Send a packet from the PC connected to
port 6 to the PC connected to port 5. The packet is a unicast packet.
(5) Delete the MAC address added in step (4). Add an MAC address that is different from the MAC
address of the PC. All the packets sent from this PC are filtered and dropped by port 5.
Summary: The port security function prohibits a port from automatically learning the dynamic MAC
address, but the port can learn the static MAC address. In addition, only the data sent from the PC that
is bound with an MAC address can be received or forwarded. The port where the secure mode is
enabled will filter out and drop the packets that are not bound with the MAC address, but can receive
packets forwarded from other ports of the device.
3. Static MAC address binding function