I have an issue in my network where I see almost daily the following error message in one of my CORE switches:
Mar 6 11:15:38: %C4K_EBM-4-HOSTFLAPPING: Host 00:15:00:13:C9:5F in vlan 251 is flapping between port Gi2/2 and port Gi2/1
Mar 6 11:18:10: %C4K_EBM-4-HOSTFLAPPING: Host 00:15:00:13:C9:5F in vlan 251 is flapping between port Gi2/1 and port Gi2/2
I have identified the host with the MAC address 00:15:00:13:C9:5F which seems to be a PC with a wireless connection to one of my APs:
AP_PLT_DIRPROD_01#sh dot11 associations | i 0015.0013.c95f
0015.0013.c95f 172.27.216.17 4800-radio AP_PLT_DIRPROD_ self Assoc
I have spanning-tree disabled in VLAN 251 on the AP and I don't think this issue is due to a STP loop.
Do you think this could be due to a virus on that PC? Or what do you recommend to do?
Thanks a lot!!
Juan Pablo Corrales