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MAC limit allows users to set a maximum number of MAC addresses to be stored in the MAC address table. The MAC 

addresses chosen to be stored in MAC address table is the result of first-come-first-save policy. Once a MAC address is 

stored in the MAC address table, it stays in until it is aged out. When an “opening” is available, the switch stored the first 

new MAC address it sees in that opening. All packets from MAC addresses not in the MAC address table should be 

blocked.  

 

The Layer 2 MAC Limit function can be per-port configured for security management purposes. When the port is in MAC 

Limit mode, the port will be "locked" without permission of address learning. Only the incoming packets with Source MAC 

already existing in the address table can be forwarded normally. User can disable the port from learning any new MAC 

addresses. 

 

 

 MAC Limit - Configure MAC Limit   

 

The page includes the following fields: 

 or disable MAC limit function for the Managed Switch. 

Indicate port 1 to port 26. 

The maximum number of per-port MAC addresses to be learned (1-64, 0 to 

disable this port's MAC limit function).