Layer 2 | 563mac learning-limit dynamicAfter you enable a MAC learning limit, MAC addresses learned on the port and entered in the MACaddress table are static by default. If you configure the MAC learning dynamic option, learned MACaddresses are stored in the dynamic region of the table and are subject to aging. Entries created before thisoption is set are not affected.On the C-Series and S-Series, the MAC address table is stored in the Layer 2 FIB region of CAM. TheLayer 2 FIB region allocates space for static MAC address entries and dynamic MAC address entries.On the E-Series, the MAC address table is stored in the Layer 2 ACL region. All MAC address entries onthe E-Series are dynamic.mac learning-limit station-movemac learning-limit station-move is available only on platforms: c sThe station-move option, allows a MAC address already in the table to be learned off of another interface.For example, if you disconnect a network device from one interface and reconnect it to another interface,the MAC address is learned on the new interface. When the system detects this “station move,” the systemclears the entry learned on the original interface, and installs a new entry on the new interface.FTOS Behavior: If you do not configure the dynamic option, the C-Series and S-Series do not detectstation moves in which a MAC address learned off of a MAC-limited port is learned on another port onsame line card. Therefore, FTOS does not take any configured station-move violation action. When aMAC address is relearned on any other linecard (any line card except the one to which the originalMAC-limited port belongs), the station-move is detected, and the system takes the configured theviolation action.
