ZyXEL Communications MES3500 Series, User Manual

Page: 162 / 370

Chapter 19 Port Security
MES3500 Series User’s Guide
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* Settings in this row apply to all ports.
Use this row only if you want to make some of the 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.
Active 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.
Address
Learning 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.
Limited Number
of Learned MAC
Address 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 must wait until
one of the five learned MAC addresses ages 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.
Shutdown Select this option to allow the Switch to shut down the port when the specified number of
MAC addresses that may be learned on a port is reached.
Apply 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.
Cancel Click Cancel to begin configuring this screen afresh.
Table 54
Advanced Application > Port Security (continued)
LABEL DESCRIPTION