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4.2.11 MAC Constraint
The “MAC Constraint” mean the MAC Limit Configuration”. This page menu lets the user limit the number of
incoming MAC addresses per port. If the user wants to disable this function, select
“Disable” from the
combo box “Mac Limit Function” on the upper left. The Limit Quantity range is 1~8192 per port. The MAC
addresses learned are recorded on a per-port basis. Only the frames with such recorded MAC addresses will
be forwarded. This learning process will be conducted every three minutes. So, if users change the NIC of
the PC or IP appliance, the new MAC address will be learned in three minutes by the Switch, within the set
quantity limitations. The MAC Constraint Limit Function can be disabled or enabled per port, under the
parameter labeled “Action” in the table. Generally this function is only enabled for downlink ports.
Figure: 4.2.16
