24Follow these steps to configure the MAC learning limit on a Layer 2 Ethernet interface or all ports in a portgroup:To do… Use the command… RemarksEnter system view system-view —Enter interface view orport group viewEnter Layer 2 Ethernet interfaceview:interface interface-typeinterface-numberEnter port group view:port-group manualport-group-nameRequiredUse either command.Settings in Layer 2 Ethernet interface viewtake effect on the interface only. Settings inport group view take effect on all memberports in the port group.Configure the MAClearning limit on theinterface or port groupmac-address max-mac-count countRequiredNo MAC learning limit is configured bydefault.NOTE:• Layer 2 aggregate interfaces do not support the mac-address max-mac-count command.• Do not configure the MAC learning limit on any member ports of an aggregation group. Otherwise, themember ports cannot be selected.Enabling MAC address roamingAfter you enable MAC address roaming on an IRF fabric, each member switch advertises learned MACaddresses to other member switches.As Figure 4 shows, Device A and Device B form an IRF fabric enabled with MAC address roaming. Theyconnect to AP C and AP D, respectively. When Client A associates with AP C, Device A learns the MACaddress of Client A and advertises it to the member switch Device B.
