Interlogix NS2503-24P/2C User Manual Manual de usuario Pagina 121

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NS2503-24P/2C User Manual
121
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 that are not in the MAC address table should be blocked.
MAC Limit Configuration
The Layer 2 MAC Limit function can be configured per each port 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 4-13-1: MAC Limit - Configure MAC Limit Interface Screenshot
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 24.
Limit:
The maximum number of per-port MAC addresses to be learned (1-64, 0 to
disable this port's MAC limit function).
Apply: Press this button for the changes to take affect.
Help: Provide help information of MAC Limit function.
MAC Limit functions only on Fast Ethernet ports, from Port 1 to port 24.
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