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SV3200 MAC flapping

LazerHawk
Visitor

SV3200 MAC flapping

Hello there,

Our SV3200 has 2 LACP bonds (4x 1Gbps each) with Cisco 3850 (2-stack).

The way we connected it is very similar to this (taken from SV3200 user guide).

Untitled.png

LACP seems to be estabilished properly, however, we're observing very random MAC Flaps few times a day:

*Sep 5 13:28:31.891: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11 
*Sep 5 13:33:46.353: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12
*Sep 5 13:33:46.447: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12 
*Sep 5 13:39:01.887: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11
*Sep 5 13:39:01.978: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11 
*Sep 5 13:44:16.548: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12
*Sep 5 13:44:16.648: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po11 and port Po12 
*Sep 5 13:49:31.986: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11
*Sep 5 13:49:32.078: %SW_MATM-4-MACFLAP_NOTIF: Host 0060.0869.97ef in vlan 99 is flapping between port Po12 and port Po11 

 

Any ideas what could be causing this?

Or at least any clue how to troubleshoot this? This MAC address is strange and it doesn't belong to any device - 0060.0869.97ef

 

Thanks!

 

3 REPLIES
Afandi
Occasional Visitor

Re: SV3200 MAC flapping

yes, i facing same problems.

2 ALB 1G port connect to Cisco 2960. i read many flapping msg on switch.

anyone have experience like this ?

 

thk

Benoit-Lion
Occasional Visitor

Re: SV3200 MAC flapping

Same problem with Cisco 3750, no answer form HP.

JasonLin615
Occasional Visitor

Re: SV3200 MAC flapping

Same problem with Cisco 2960, still can not find root cause, is anyone figure out?