Cisco 9136i connected with dual port switch macflapp

[mohammad.rizky]

Hi All,

I hope we are doing well.

I have issue with cisco AP 9136i always appears macflapp during connected in two different switches (non LAG). we are already check the configuration and the speed status is normal, but some time these port appears macflapp. we are already try to change port, reload AP but the issue still persist. maybe you're have same issue with 9136 and know what the workarround about this. for now, i disable one port of switch for temporary solutions.

%SW_MATM-4-MACFLAP_NOTIF: Host ec19.2e41.5edf in vlan 501 is flapping between port Twe1/0/20 and port Twe1/0/15
%SW_MATM-4-MACFLAP_NOTIF: Host ec19.2e41.5edf in vlan 501 is flapping between port Twe1/0/20 and port Twe1/0/15

Cisco WLC = 9800-L-F
OS Version = 17.14.1

Thank You all

[Rich R]

@mohammad.rizky that will cause an outage and will not stop the MACs flapping because it has no effect on which port the AP sends the traffic out of!

There is no loop!  That is a purely informational message from the switch telling you that it has seen that MAC address move.  Also completely normal to see that message with locally switched WLANs when clients roam between APs on the same switch.

Your options:
- Suppress the log messages using "logging discriminator" if you don't want the logs filled with those messages
- use port-channel

If Cisco ever provide the enhancements Leo referred to then the issue might get resolved but because it is not affecting service (considered purely cosmetic) it will be the lowest priority so might never get worked on.

[mohammad.rizky]

Thank you @Rich R for the suggestion.