Figure 54 Port Security; Table 34 Port Security - ZyXEL Communications ZyXEL Dimension ES-4024 User Manual

ES-4024A User's Guide

Figure 54 Port Security

The following table describes the labels in this screen.

Table 34 Port Security

LABEL
Port
Active
Address
Learning
Limited Number
of Learned MAC
Address
Apply
Cancel
116
DESCRIPTION
This field displays a port number.
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 "254". "0" means this feature is disabled, so the switch will learn MAC
addresses up to the global limit of 16K.
Click Apply to save your changes back to the switch.
Click Cancel to begin configuring this screen afresh.
Chapter 17 Port Security