The process of disabling and enabling the team interface causes the interface to select a new MAC address from the remaining team members, and eliminates the MAC address conflict. To resolve this conflict, disable and then enable the team interface. If the primary team member is removed from the team and then placed into operation, there may be a MAC address conflict. In most situations this doesn't cause problems, but there are a few cases where issues might arise. Because the primary team member might change in a non-deterministic manner at each boot, NIC disable/enable action, or other reconfiguration activities, the primary team member might change, and the MAC address of the team might vary.
It is the first team member to bind to the team after you create it or after the host computer is restarted. The primary NIC Team member is a network adapter that the operating system selects from the initial set of team members. When you configure a NIC Team with switch independent mode and either address hash or dynamic load distribution, the team uses the media access control (MAC) address of the primary NIC Team member on outbound traffic. Applies to: Windows Server 2022, Azure Stack HCI, version 20H2 Windows Server 2019, Windows Server 2016
