User’s Manual of FGSD-1022 Series
4.11 MAC Limit
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.
4.11.1 MAC Limit Configuration
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.
Figure 4-11-1: MAC Limit - Configure MAC Limit
The page includes the following fields:
Object Description
MAC Limit Enable or disable MAC limit function for the Managed Switch.
Port Number
Indicate port 1 to port 8.
Limit
The maximum number of per-port MAC addresses to be learned (1-64, 0 to
disable this port's MAC limit function).
MAC Limit is only functioned on Fast Ethernet port, the Port-1 to Port-8
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