04-01-2009 09:01 AM - edited 03-06-2019 04:56 AM
Hi,
I got to see MaC flap error today on my cisco 3750 switch which took my siwtch offline for some time.
logs:-
01/04/2009 17:53
%SW_MATM-4-MACFLAP_NOTIF: Host 0800.0ef5.dac4 in vlan 2 is flapping between port Po4 and port Fa3/0/33
01/04/2009 17:53
%SW_MATM-4-MACFLAP_NOTIF: Host 0021.4a5e.4892 in vlan 5 is flapping between port Po4 and port Fa3/0/18
01/04/2009 17:53
%SW_MATM-4-MACFLAP_NOTIF: Host 0800.0e14.1b93 in vlan 2 is flapping between port Fa3/0/1 and port Po4
01/04/2009 17:56
%SW_MATM-4-MACFLAP_NOTIF: Host 0800.0e98.1c21 in vlan 5 is flapping between port Po4 and port Fa1/0/9
%SW_MATM-4-MACFLAP_NOTIF: Host 0800.0f24.1c31 in vlan 2 is flapping between port Po4 and port Fa1/0/46
%SW_MATM-4-MACFLAP_NOTIF: Host 0800.0e45.efe4 in vlan 2 is flapping between port Po4 and port Fa3/0/41
%SW_MATM-4-MACFLAP_NOTIF: Host 0800.0e56.1f1 in vlan 2 is flapping
Could anyone tell me what cause ths and what precaution do i need to take??
Thanks in advance.
04-01-2009 09:07 AM
Generally, this can happen when users are roaming from one wireless ap to another. Do you have APs connected to these ports?
HTH,
John
04-01-2009 09:18 AM
neha,
To make sure that PO4 is running well. What kind of device is connecting to PO4?
What type of interface are you using on the PO4? Fiber?
Toshi
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