Figure 58 Port Security; Table 37 Port Security - ZyXEL Communications Dimension ES-2108 User Manual

ES-2108 Series User's Guide

Figure 58 Port Security

The following table describes the labels in this screen.

Table 37 Port Security

LABEL
Active
Port
*
Active
Address
Learning
Limited Number
of Learned MAC
Address
Apply
Cancel
122
DESCRIPTION
Select this check box to enable the port security feature on the switch.
This field displays a 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 (activated in the Basic Settings,
Port Setup screen) 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 "8192". "0" means that the limiting of learned addresses 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 17 Port Security