01-09-2015 12:59 PM - edited 03-07-2019 10:10 PM
Hi all, I'm seeing messages like the following reported on a Nexus 5596:
2015 Jan 7 12:40:48.954 Switch-5596A %FWM-6-MAC_MOVE_NOTIFICATION: Host 00ab.cdef.0123 in vlan 104 is flapping between port Po5 and port Po10
Po5 is connected to a storage cluster and is configured as an access port. It is connected to 2 Nexus 5596 switches using vpc.
interface port-channel5
description Storage Shelf 1
priority-flow-control mode off
switchport access vlan 104
spanning-tree port type edge
spanning-tree bpduguard enable
speed 10000
flowcontrol receive on
vpc 5
Po10 is the uplink to the core switch:
interface port-channel10
description uplink
switchport mode trunk
switchport trunk native vlan 2702
switchport trunk allowed vlan 64,94,104,124
spanning-tree port type network
speed 10000
vpc 10
Any ideas on why we would be seeing these log messages?
Thank you.
01-09-2015 05:24 PM
You need to trace this mac address: - 00ab.cdef.0123 and check if this has dual nic card if yes then check if nic teaming is configured correctly ...then shut down one of the link and see if you are learning the same mac address on two different ports?
HTH
01-12-2015 12:31 AM
MAC Flapping is usually a symptom of a misconfiguration between a switch port and end connected storage or server.
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