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Cisco 3750 Switch Port Flapping with connection of WLC 5500

Hi

i am recieving the following in my logs...

000176: Feb 17 05:03:06: %SW_MATM-4-MACFLAP_NOTIF: Host 0015.001d.c50c in vlan 998 is flapping between port G1/0/2 and port G1/0/3

the controller have enable LAG on ports an the configuration on switch ports are:

interface gigabitethernet 1/0/2

description WLC 5500

switchport trunk encapsulation dot1q

switchport mode trunk

interface gigabitethernet 1/0/3

description WLC 5500

switchport trunk encapsulation dot1q

switchport mode trunk

Someone have what happen whit this

Best Regards

3 ACCEPTED SOLUTIONS

Accepted Solutions
Hall of Fame Super Gold

Cisco 3750 Switch Port Flapping with connection of WLC 5500

the controller have enable LAG on ports an the configuration on switch ports are:

WLC is LAG but your switchports aren't, hence you are seeing this error message.

conf t

int r g1/0/2 - 3

channel-group 16 mode on

end

VIP Purple

Cisco 3750 Switch Port Flapping with connection of WLC 5500

Is this a wireless client MAC address ?

post "show etherchannel summary"  & "show etherchannel load-balance" output of your switch.

Regards

Rasika

Cisco Employee

Cisco 3750 Switch Port Flapping with connection of WLC 5500

3 REPLIES
Hall of Fame Super Gold

Cisco 3750 Switch Port Flapping with connection of WLC 5500

the controller have enable LAG on ports an the configuration on switch ports are:

WLC is LAG but your switchports aren't, hence you are seeing this error message.

conf t

int r g1/0/2 - 3

channel-group 16 mode on

end

VIP Purple

Cisco 3750 Switch Port Flapping with connection of WLC 5500

Is this a wireless client MAC address ?

post "show etherchannel summary"  & "show etherchannel load-balance" output of your switch.

Regards

Rasika

Cisco Employee

Cisco 3750 Switch Port Flapping with connection of WLC 5500

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