ZyXEL GS1920 Series User Guide - Page 151

Chapter 19 Port Security Figure 114 Advanced Application > Port Security The following table describes the labels in this screen. Table 62 Advanced Application > Port Security LABEL Port List MAC freeze Active Port * DESCRIPTION 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. 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. Select this option to enable port security on the Switch. This field displays the 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. Active Address Learning Note: Changes in this row are copied to all the ports as soon as you make them. 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. MAC address learning reduces outgoing broadcast traffic. For MAC address learning to occur on a port, the port itself must be active with address learning enabled. GS1920 Series User's Guide 151