Figure 71 Advanced Application > Port Security; Table 41 Advanced Application > Port Security - ZyXEL Communications GS-4012 User Manual

Chapter 17 Port Security
Figure 71 Advanced Application > Port Security
The following table describes the labels in this screen.
Table 41 Advanced Application > Port Security
LABEL
Active
Port
*
Active
Address
Learning
Limited Number
of Learned
MAC Address
148
DESCRIPTION
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.
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.
GS-4012F/4024 User's Guide