ZyXEL Communications ZyXEL Dimension ES-3124 - Manual (Page 131)

Dimension ES-3124 Ethernet Switch
Port Security 16-3
Table 16-1 Port Security
LABEL DESCRIPTION
Active Select this check box to enable the port security feature on the switch.
Port This field displays a port number.
Active Select this check box to enable the port security feature on this port. The switch forwards
packet(s) whose MAC address(es) is in the MAC address table on this port. Packet(s) 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 with address learning enabled.
Limited Number of
Learned MAC
Address Use this field to limit the number of (dynamic) MAC addresses that may be learned on a port.
For example, if you set this field to "5" on port 2, then only the devices with these five learned
MAC addresses may access port 2 at any one time. A sixth device would have to wait until one
of the five learned MAC addresses aged out. MAC-address aging out time can be set in the
Switch Setup screen. The valid range is from 0 to 16K. 0 means this feature is disabled, so the
switch will learn MAC addresses up to the global limit of 16K.
Apply Click Apply to save your changes back to the switch.
Cancel Click Cancel to begin configuring this screen afresh.