Manufacturer’s ethernet id – Ampro Corporation 486E User Manual
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Product Reference
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Manufacturer’s Ethernet ID
Ethernet network adapter and interface manufacturers are assigned a unique manufacturer’s ID by
the IEEE Standards Office. A network address consists of 48 bits. The upper 24 bits are the
manufacturer’s ID and the lower 24 bits are the board’s unique ID.
Developers creating network applications must know whether the manufacturer’s ID for network
adapters attached to the network are important or not.
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 network analysis programs in binary
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