ZyXEL Communications GS1920v2 Series User Manual page 423

Table 235 SECURITY > Port Security (continued)
LABEL DESCRIPTION
Active Select this check box to enable the port security feature on this port. The Switch forwards
packets whose MAC addresses is in the MAC address table on this port. Packets with no
matching MAC addresses are dropped.
Clear this check box to disable the port security feature. The Switch forwards all packets on this
port.
Address MAC address learning reduces outgoing broadcast traffic. For MAC address learning to occur
Learning
on a port, the port itself must be active with address learning enabled.
Limited Use this field to limit the number of (dynamic) MAC addresses that may be learned on a port.
Number of
For example, if you set this field to "5" on port 2, then only the devices with these five learned
Learned MAC
MAC addresses may access port 2 at any one time. A sixth device must wait until one of the
Address
five learned MAC addresses ages out. MAC address aging out time can be set in the SYSTEM >
Switch Setup screen. The valid range is from "0" to "32K". "0" means this feature is disabled.
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.
Chapter 66 Port Security
GS1920v2 Series User's Guide
423