January 2004
Intermediate to advanced
536 pages
13h 2m
English
Content preview from IPv6, 2nd Edition
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Chapter 8 • IPv6 Addressing 153
As just noted, EUI-64 interface identifiers are assigned to link layer network
interfaces, usually by manufacturers who are assigned OUIs by the IEEE.
Each OUI is a 24-bit value that is linked to one and only one entity (usually a
manufacturer of networking equipment). Manufacturers of Ethernet (and
other network link layer) interfaces burn into each interface a globally
unique identifier usually known as a Media Access Control (MAC) address.
The high-order 24 bits is the OUI, and the rest of the address (another 24 bits
for Ethernet) is assigned by the OUI entity. The result is that all Ethernet
cards have a globally
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