1. IPv6 / IP Next Generation
Group 2
Aaron Wroblewski
Andrew Doherty
Raghav Chawla

2. Introduction IPv4 Studied in Lecture IPv6 is a major upgrade to IPv4
New System of Headers and Addressing
Quality of Service enhancements

3. Background Originally developed in the Late 1990s
Using IPv6 in an IPv4 Network
Not widely in use
Supported by Cisco, Windows, Mac, etc.
As of 2004, supported by Root DNS
U.S. Government support by summer 2008

4. Motivation Problems with IPv4 Not Enough Address Space
32 bit address scheme
CIDR – Classless Addressing
NAT – Address Translation
Overly Complex Headers
Limited Quality of Service Support

5. Expanded Addressing Capabilities
From 32 to 128 Bits
More Levels of Addressing Hierarchy
Automatic Address Assignment
Improved Multicast Scalability
Introducing “Anycast”

6. IPv6 Header
Source: wikipedia.org

7. Header Format Simplification
Designed to minimize overhead
Dropped:
Header Length
Identification
Header Checksum
protocol
Use of Optional Extension Headers

8. Quality of Service Support
Flow Label Field
Special Handling
Resource Reservation
Traffic Class Field
Differentiated Service
Real-Time Applications

9. Improved Support for Extensions and Options
Hop by Hop Options
Routing
Fragment
Destination Options
Authentication
Encapsulating Security Payload

10. Extension Headers

11. Authentication and Privacy
Extensions to support
Authentication
Data Integrity
Data Confidentiality (Optional)
[RFC 2401]

12. Issues Packet Size Issues Upper Layer Protocol
Requires minimum MTU of 1280 octets
Path MTU discovery recommended
Upper Layer Protocol
Upper Layer Checksums
Maximum packet lifetime
Maximum upper layer payload size
Responding to packets that do not carry Routing headers

13. Related Work
[RFC 2401] “Security Architecture for the Internet Protocol”
[RFC 2402] “IP Authentication Header”
[RFC 2406] “IP Encapsulating Security Protocol (ESP)”
[ADDRARCH] “IP Version 6 Addressing Architecture”

14. Critique Traffic Class – Useful? Flow Label – Placement?
Performance Data?

15. Summary and Conclusions
Source: networkdictionary.com

16. Questions?