On sparc64 the hme driver respects the local-mac-address? system configuration variable which can be set in the Open Firmware boot monitor using the setenv command or by eeprom(8). If set to "false" (the default), the hme driver will use the systems default MAC address for all of its devices. If set to "true", the unique MAC address of each interface is used if present rather than the systems default MAC address.
Supported interfaces having their own MAC address include on-board versions on boards equipped with more than one Ethernet interface and all add-on cards except the single-port SBus versions.
gem(4), intro(4), miibus(4), netintro(4), eeprom(8), ifconfig(8)
.Rs "STP2002QFP Fast Ethernet, Parallel Port, SCSI (FEPS) Users Guide"