ZyXEL Communications ES3500 Series Port, Apply, Active, Active, Cancel, Cancel, Address, Address, Learning, disabled, Port List, this port, MAC freeze, MAC freeze, Limited Number

Chapter 19 Port Security

The following table describes the labels in this screen.

Table 52 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 option to enable port security 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 of the 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	MAC address learning reduces outgoing broadcast traffic. For MAC address learning to occur
Learning	on a port, the port itself must be active with address learning enabled.
Limited Number	Use this field to limit the number of (dynamic) MAC addresses that may be learned on a
of Learned MAC	port. For example, if you set this field to "5" on port 2, then only the devices with these five
Address	learned MAC addresses may access port 2 at any one time. A sixth device must wait until
	one of the five learned MAC addresses ages out. MAC address aging out time can be set in
	the Switch Setup screen. The valid range is from “0” to “16384”. “0” means this feature is
	disabled.
Apply	Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
	changes if it is turned off or loses power, so use the Save link on the top navigation panel to
	save your changes to the non-volatile memory when you are done configuring.
Cancel	Click Cancel to begin configuring this screen afresh.

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	ES3500 Series User’s Guide