I want to try and understand the error messages listed below.
My setup has two 3560 switches both working in sync and providing failover in the event of any port going down respectively. Here are the messages:
402942: *Mar 6 23:30:13.243: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.29d4.3265 in vlan 10 is flapping between port Po12 and port Gi0/1
402946: *Mar 6 23:30:37.427: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.29d4.3265 in vlan 10 is flapping between port Gi0/1 and port Po12
402947: *Mar 6 23:30:39.306: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.29d4.326f in vlan 60 is flapping between port Gi0/1 and port Gi0/2
402937: *Mar 6 23:30:01.776: %SW_MATM-4-MACFLAP_NOTIF: Host 000c.29d4.326f in vlan 60 is flapping between port Gi0/2 and port Gi0/1
From a little research I understand this could be a loop or incorrectly configured loadbalancing. Here are the configurations of both switches:
Port:
interface GigabitEthernet0/1
description esx1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 2-100
switchport mode trunk
channel-group 1 mode active
spanning-tree portfast trunk
Here is the port channel:
interface Port-channel1
description esx1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 2-100
switchport mode trunk
spanning-tree portfast trunk
The other switch which has an interconnect on ports 47 and 48 with Portchannel 12.
Any advice or ways to debug this would be very helpful. I must add, that I cannot use the debug option in IOS as the swicthes are remote and I cannot risk the ports being unavailable, and of course they are in production.
