ZyXEL Communications ES-2024 Series, User Manual, Page: 138 / 282

Chapter 19 Port Security
ES-2024 Series User’s Guide
138
Figure 74 Advanced Application > Port Security
The following table describes the labels in this screen.
Table 39 Advanced Application > Port Security
LABEL DESCRIPTION
Port List Enter the number of the port(s) (separated by a comma) on which you want to
enable port security and disable MAC address learning. After you click MAC freeze ,
all previously learned MAC addresses on the specified port(s) will become static
MAC addresses and display in the Static MAC Forwarding screen.
MAC freeze Click MAC freeze to have the Switch automatically select the Active check boxes
and clear the Address Learning check boxes only for the ports specified in the Port
list .
Active Select this check box to enable the port security feature on the Switch.
Port This field displays a port number.
* Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this
row first to set the common settings and then make adjustments on a port-by-port
basis.
Note: Changes in this row are copied to all the ports as soon as you
make them.
Active Select this check box to enable the port security feature on this port. The Switch
forwards packets whose MAC address(es) is in the MAC address table on this port.
Packets with no matching MAC address(es) are dropped.
Clear this check box to disable the port security feature. The Switch forwards all
packets on this port.
Address
Learning
MAC address learning reduces outgoing broadcast traffic. For MAC address
learning to occur on a port, the port itself must be active (activated in the Basic
Settings , Port Setup screen) with address learning enabled.