Every now and then I encouter mac flap entries in my log files.
001360: Sep 16 12:33:00.020: %SW_MATM-4-MACFLAP_NOTIF: Host 0023.33b0.ae60 in vlan 11 is flapping between port Gi3/0/4 and port Gi1/0/49
001361: Sep 16 12:33:00.457: %SW_MATM-4-MACFLAP_NOTIF: Host 0022.19c9.ab45 in vlan 11 is flapping between port Gi3/0/4 and port Gi1/0/10
001362: Sep 16 12:33:00.515: %SW_MATM-4-MACFLAP_NOTIF: Host 001f.2921.3a5e in vlan 11 is flapping between port Gi3/0/4 and port Gi2/0/11
001363: Sep 16 12:33:00.557: %SW_MATM-4-MACFLAP_NOTIF: Host 0013.21ec.c754 in vlan 11 is flapping between port Gi3/0/4 and port Gi2/0/2
001364: Sep 16 12:33:01.463: %SW_MATM-4-MACFLAP_NOTIF: Host 001b.38f1.5aa2 in vlan 11 is flapping between port Gi3/0/4 and port Gi3/0/3
001365: Sep 16 12:33:01.707: %SW_MATM-4-MACFLAP_NOTIF: Host 000d.9d8e.c17c in vlan 11 is flapping between port Gi3/0/4 and port Gi3/0/6
Port 1/0/49 goes to my router. Port 1/0/10 is an access port, Ports 2/0/2, 2/0/11, 3/0/3, and 3/0/6 each trunk to a 3560 switch over fiber. Port 3/0/4 goes to a 3560 switch located in the equipment room of my communication tower. None of the other switches have any wireless and there are no redudant links between any of these devices.
