1-7z The MAC address aging timer takes effect globally on dynamic MAC address entries (learned oradministratively configured) only.z In a stable network, when there has been no traffic activity for a long time, all the dynamic entries inthe MAC address table maintained by the device will be deleted. When it happens, the devicebroadcasts a large amount of data packets, which may be listened to by unwanted users, resultingin security hazards. In this case, you can configure mac-address timer no-aging for dynamicMAC address entries, that is, not to age out dynamic MAC address entries, thus reducingbroadcasts and ensuring the stability and security of the network.Configuring the MAC Learning LimitAs the MAC address table is growing, the forwarding performance of your device may degrade. Toprevent the MAC address table from getting so large that the forwarding performance is affected, youcan limit the number of MAC addresses that can be learned on a port.Follow these steps to configure the MAC learning limit on an Ethernet port, or the Ethernet ports in aport group or ONU port:To do… Use the command… RemarksEnter system view system-view —Enter Ethernetinterface viewinterface interface-typeinterface-numberEnter port group view port-group manualport-group-nameEnterEthernetinterfaceview, portgroup view,or ONU portviewEnter ONU port view interface onuinterface-numberUse any of these threecommands.The configuration you make inEthernet interface view or ONUport view takes effect on thecurrent interface only; theconfiguration you make in portgroup view takes effect on allthe member ports in the portgroup.Configure the MAC learning limit on anEthernet port, port group or ONU portmac-addressmax-mac-count countRequiredNo MAC learning limit isconfigured by default.Displaying and Maintaining MAC Address TablesTo do… Use the command… RemarksDisplay MAC address tableinformationdisplay mac-address[ mac-address [ vlan vlan-id ] |[ [ dynamic | static ] [ interfaceinterface-typeinterface-number ] |blackhole ] [ vlan vlan-id ][ count ] ]Display the aging timer fordynamic MAC address entriesdisplay mac-addressaging-timeAvailable in any view
