When you enable sticky mac on an interface, dynamically-learned MAC addresses do not age, even if you enabled mac-learning-limit dynamic. If you configured mac-learning-limit and mac-learning-limit dynamic and you disabled sticky MAC,any dynamically-learned MAC addresses ages.mac learning-limit station-moveThe mac learning-limit station-move command allows a MAC address already in the table to be learned from another interface.For example, if you disconnect a network device from one interface and reconnect it to another interface, the MAC address is learned onthe new interface. When the system detects this “station move,” the system clears the entry learned on the original interface and installs anew entry on the new interface.mac learning-limit no-station-moveThe no-station-move option, also known as “sticky MAC,” provides additional port security by preventing a station move.When you configure this option, the first entry in the table is maintained instead of creating an entry on the new interface. no-station-move is the default behavior. Entries created before you set this option are not affected.To display a list of all interfaces with a MAC learning limit, use the following command.Display a list of all interfaces with a MAC learning limit.EXEC Privilege modeshow mac learning-limitDell Networking OS Behavior: The systems do not generate a station-move violation log entry for physical interfaces or port-channelswhen you configure mac learning-limit or when you configure mac learning-limit station-move-violation log.Dell Networking OS detects a station-move violation only when you configure mac learning-limit dynamic and logs the violationonly when you configure the mac learning-limit station-move-violation log, as shown in the following example.Dell(conf-if-te-1/1)#show config!interface TenGigabitEthernet 1/1no ip addressswitchportmac learning-limit 1 dynamic no-station-movemac learning-limit station-move-violation logno shutdownLearning Limit Violation ActionsTo configure the system to take an action when the MAC learning limit is reached on an interface and a new address is received using onethe following options with the mac learning-limit command, use the following commands.• Generate a system log message when the MAC learning limit is exceeded.INTERFACE modelearn-limit-violation log• Shut down the interface and generate a system log message when the MAC learning limit is exceeded.INTERFACE modelearn-limit-violation shutdownLayer 2 521
