Format of Global Unicast Addresses

• Prefix

• • High-order 64 bits
  • Typically assigned to hosts by routers

• Interface Identifiers

• • Typically the low order 64 bits of an IPv6 address
  • • But they can be manually assigned like in v4, dynamically assigned with DHCPv6, or chosen randomly
  • Based on IEEE MAC address of NIC
  • 48-bit MAC addresses are expanded
  • • See IEEE1394