Chapter 19 Port Security
GS1920 Series User’s Guide
152
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 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 “16384”. “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. 
Table 62   Advanced Application > Port Security  (continued)
LABEL DESCRIPTION