ZyXEL Communications MGS3700-12C User Manual page 207

Table 50 Advanced Application > Port Security (continued)
LABEL
*
Active
Address
Learning
Limited
Number of
Learned MAC
Address
Alarm
Threshold
Apply
Cancel
MGS3700-12C User's Guide
DESCRIPTION
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.
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.
Alarm threshold of learned MAC address.
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
207