The IPv6 Global Routing Prefix
IPv6 global unicast addresses allow IPv6 to work more like the original design of the IPv4 Internet. In other words, each organization asks for a block of IPv6 addresses, which no one else can use. That organization further subdivides the address block into smaller chunks, called subnets. Finally, to choose what IPv6 address to use for any host, the engineer chooses an address from the right subnet.
That reserved block of IPv6 addresses—a set of addresses that only one company can use—is called a global routing prefix. Each organization that wants to connect to the Internet, and use IPv6 global unicast addresses, should ask for and receive a global routing prefix. Very generally, you can think of the global routing ...
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