On 05/25/2014 01:13 PM, Johnny Billquist wrote: Essentially, the MAC address in the actual ethernet controller (or the MAC address set before boot in simh) is irrelevant. Once DECnet starts running, that MAC address is not used anymore. It is just a trivia piece of information so that you can know what the hardware MAC address from the factory is. It is not used by anything, especially not anything related to network communication. The only reason I might find the actual hard-coded MAC address to be useful is in identifying machines. A lot of Ethernet cabinet kits have stickers on them with the MAC address printed on them. Of course nearly every one I've seen has been WRONG, but.. ;) -Dave -- Dave McGuire, AK4HZ New Kensington, PA