Product Reference
2–47
Manufacturer’s Ethernet ID
Ethernet network adapter and interface manufacturers a re a ssigned a uni que manuf acture r’s ID by
the IEEE Standards Office. A network address consist s of 48 bi ts. The uppe r 24 bits are th e
manufacturer’s ID and the lower 24 bits are the board’s un ique ID.
Developers creating network applications must know whether the manufacturer’s ID for network
adapters attached to the network are imp ortan t or n ot .
Ampro’s 24-bit manufacturer’s ID for Ethernet controllers is displayed in hex as follows:
00 40 53
Ethernet IDs are sometimes displayed by diagnostic or ne twork analy sis pro grams in b inary
format. Refer to your equipment manual for information on possible byte swapping in the display,
as shown in this example.
1010 1100 0010 0000 0000 0000