kernel arp moved from



  • Hi,
    We are a Virtual machine, in a network segment, and the pfsense ARP table is changing continuously of MAC address learned from this VM.
    It has only a network interface, and the ip address are not duplicate.

    Dec 5 15:02:34 kernel arp: 10.10.0.10 moved from 00:50:56:b5:a6:c3 to 00:50:56:b5:f8:80 on em2
    Dec 5 15:00:33 kernel arp: 10.10.0.10 moved from 00:50:56:b5:f8:80 to 00:50:56:b5:a6:c3 on em2
    Dec 5 14:40:37 kernel arp: 10.10.0.10 moved from 00:50:56:b5:f8:80 to 00:50:56:b5:a6:c3 on em2
    Dec 5 14:20:41 kernel arp: 10.10.0.10 moved from 00:50:56:b5:a6:c3 to 00:50:56:b5:f8:80 on em2


  • Rebel Alliance Developer Netgate

    That error can only happen from two different MAC addresses attempting to use the same address. It could be an IP conflict, or it could be a windows VM doing NIC teaming. Both of those are VMware MACs, track down which VMs they belong to and find out what is happening.