Hello! Dear Frank, >The MAC address is actually in the PROM dump (full dump below): > >``` >[...] >[ 1.0000050] 122 = 8 >[ 1.0000050] 123 = 0 >[ 1.0000050] 124 = 69 >[ 1.0000050] 125 = 11 >[ 1.0000050] 126 = 22 >[ 1.0000050] 127 = 33 >[...] >``` Problem solved! Generally, SGI machine(Indigo R3K, Indigo R4K, Indy, Indigo2) to store MAC address at hpc_eeprom[250] - hpc_eeprom[255]. https://nxr.netbsd.org/xref/src/sys/arch/sgimips/hpc/if_sq.c#266 https://nxr.netbsd.org/xref/src/sys/arch/sgimips/hpc/if_sq.c#SQ_HPC_EEPROM_ENADDR However, Indigo R3K(early lot) to store MAC address at hpc_eeprom[122] - hpc_eeprom[127]. Try this kernel. https://github.com/nullnilaki/NetBSD_irisboot/blob/master/IndigoR3K/re_netbsd.ecoff I am grateful for your support. Thank you. -- Naruaki Etomi