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Invalid MAC 000000-000000 on vlan

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  • 1.  Invalid MAC 000000-000000 on vlan

    Posted Sep 12, 2018 10:07 AM

     

    Does anybody know why I would get a MAC of 

    000000-000000 in the arp table with an IP address

     

    i think the device is a door controller but i wanted to understand why it was doing this

     

    Thanks

    Andy



  • 2.  RE: Invalid MAC 000000-000000 on vlan
    Best Answer

    Posted Sep 12, 2018 10:53 AM

    Hi Andy,

     

    when you send traffic to an IP address and that IP address is not in the ARP table of the router it tries to discover it through ARP and temporarily puts that MAC/IP address in the ARP table. I've seen it when there is a ping sweep on a subnet, it's a normal behaviour and probably that MAC doesn't belong to any device.

     

    Aarón