https://community.extremenetworks.com/t5/extremeswitching-other/cisco-switch-mac-flapping-error-logs/m-p/74622#M3782 MAC Flapping happens when the same mac address is seen on 2 ports and is learned on one port and then learned on another, and then again on the first port, and so on. This usually indicates a loop or other misconfiguration or wiring issue on your network. Please check the devices connected on those ports (Gi2/0/9 and Gi2/0/24) and follow the path until you can determine the cause for the loop or other reason that MAC address is being seen on 2 ports. Thu, 11 Jul 2019 09:04:35 GMT Matthew_Hum 2019-07-11T09:04:35Z https://community.extremenetworks.com/t5/extremeswitching-other/cisco-switch-mac-flapping-error-logs/m-p/74621#M3781 dear team,<BR /> <BR /> In my cisco switch getting log like macflap, what is it means ??<BR /> <BR /> *Mar 3 16:07:53.242 GMT: %SW_MATM-4-MACFLAP_NOTIF: Host a896.752b.8e60 in vlan 17 is flapping between port Gi2/0/9 and port Gi2/0/24 Mon, 01 Jul 2019 11:37:29 GMT https://community.extremenetworks.com/t5/extremeswitching-other/cisco-switch-mac-flapping-error-logs/m-p/74621#M3781 Prakash 2019-07-01T11:37:29Z https://community.extremenetworks.com/t5/extremeswitching-other/cisco-switch-mac-flapping-error-logs/m-p/74622#M3782 MAC Flapping happens when the same mac address is seen on 2 ports and is learned on one port and then learned on another, and then again on the first port, and so on. This usually indicates a loop or other misconfiguration or wiring issue on your network. Please check the devices connected on those ports (Gi2/0/9 and Gi2/0/24) and follow the path until you can determine the cause for the loop or other reason that MAC address is being seen on 2 ports. Thu, 11 Jul 2019 09:04:35 GMT https://community.extremenetworks.com/t5/extremeswitching-other/cisco-switch-mac-flapping-error-logs/m-p/74622#M3782 Matthew_Hum 2019-07-11T09:04:35Z