Table 33 Port Security - ZyXEL Communications ZyXEL Dimension GS-4012F User Manual

GS-4012F/4024 User's Guide

Table 33 Port Security

LABEL
Active
Port
Active
Address
Learning
Limited Number
of Learned MAC
Address
Apply
Cancel
120
DESCRIPTION
Select this check box to enable port security on the switch.
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 16K. "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