ZyXEL Communications GS 2200 Manual page 153

Table 47 Advanced Application > Port Security (continued)
LABEL
Active
Address Learning
Limited Number
of Learned MAC
Address
Apply
Cancel
GS2200-8/24 User's Guide
DESCRIPTION
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.
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 "16384". "0" means
this feature is disabled.
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.
Click Cancel to begin configuring this screen afresh.
Chapter 19 Port Security
153