When dock/adapter is connected to a Dell system that supports MAC Pass-through, and the network driver is loaded on the system, the adapter specific MAC address will be overridden by the system specific MAC address from the BIOS. Dell systems using Dell Type-C USB network dongles and docks will now have a constant MAC Address no matter which USB Type-C adapter is connected to the system.ĭell Type-C USB network adapters including the Dell Adapter – USB-C to Ethernet (RJ45) dongle, Dell DA200 Type-C Dock, The Dell Dock (WD15) and the Dell Thunderbolt Dock (TB16) all have their own MAC address built into their chipsets.
This way the network sees the system-unique MAC address. Dell has implemented a feature called MAC Address Override or MAC Address Pass Through that uses a system-unique MAC address entered in the system Basic Input/Output System (BIOS) which is then used to override the dock or dongle MAC address every time it’s connected to the network. Dell is solving a problem in the industry of USB-based Ethernet controllers.
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