IPv6 Addressing

Address Space Allocation

Table 8-1 on page 150 details how the IPv6 specification allocates the 128-bit IP address space. Specifically, the IPv6 specification entitled RFC (Request For Comments) 2373 defines the address space allocation. The column entitled “Upper Bits” defines the bit settings of the uppermost bits of the 128-bit address.

Port Addresses in “Unassigned” Range Cannot Be Used

All 128-bit IPv6 address ranges with one of the upper bit field values shown in the rows marked “Unassigned” are not available for assignment as port addresses.

Port Addresses in “Reserved” Range Cannot Be Used

All 128-bit IPv6 address ranges with one of the upper bit field values shown in the rows marked “Reserved” are not available for assignment ...

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