Motivation for IPv6

• IPv4 addresses are slowly being consumed

• • Severe rationing makes it difficult to obtain the addresses needed
  • Effects are felt more overseas than in U.S.

• Alternatives can be rather unpleasant

• • Continued rationing of IPv4 addresses
  • NAT
  • • Broken protocols
    • New applications need to be “NAT-aware”

• Current trends may drive the need for billions of addresses

• • Home networking
  • Wireless: Always-on mobile clients
  • Developing countries gaining Internet access
  • Telematics: Thin IP devices embedded into virtually anything