Our Network group monitors MAC addresses that show up on their physical switch ports and if they see a MAC address that they don't have registered to that physical port in their database, they generate a Help Desk ticket and threaten to shut the physical port down. I've tried searching online for why this is happening and I've opened a ticket with VMware, all to no avail. Do any of you ever experience this issue, or perhaps know why this is happening? The issue is transient so I'm thinking it has something to do with vMotion.
We're being told that this is happening on each of our ESXi 5.5 hosts, which all have 1 dedicated vMotion vSwitch with 1 dedicated NIC hooked up to a non-routing VLAN.
