Global Unicast

Registrars

• Numbering authorities that rule over a specific region
• ARIN
  • America
• LACNIC
  • Latam
• RIPE
  • Europe
• AFRINIC
  • Africa
• APNIC
  • Asia

Hierarchy

IPv6 Prefix

• 64 Bits
• Globally Unique
  • (2)
• Sometimes Hierarchical (first 16 bits)
  • 2001 Everywhere
  • 2600 ARIN
  • 2800 LACNIC
  • 2A00 RIPE
  • 2C00 AFRINIC
• Summarize a routing table, squash into a couple hundred.
  • If they are contiguous we can group them together in order to have one entry.
  • This is how we divided the world in order to make everything much more scalable.

IPv6 Prefix Breakdown

• North America 2600: /12
• ISP LIR 2600:0001 / 32
• Customer 2600:0001:0001:/48
• Customer Subnet 2600:1:1:1::/64
  • Subnet range from 2600:1:1:1 - 2600:1:1:5555
  • 65,536 subnets
    • You can create lots of subnets and each one of them will be isolated from the next one.
  • 64 host bits = 18,446,744,073,709,551,616
  • 18 quintillion IDs per subnet