A brief overview of IPv6 and a comparison with IPv4. Also mentions the proposed MobileIP extension header.

1. INTERNET PROTOCOL VERSION 6 Presented By: Divye Kapoor B.Tech (IDD) CSI

2. Acknowledgements Akhil Langer B. Tech. Computer Science IIT Roorkee

4. IPv4 - RECAP

5. THE MAIN IPV6 HEADER

6. IPv4 – What’s Lost

8. Larger Address Space (2128 hosts)

9. SIMPLIFY THE PROTOCOL, TO ALLOW ROUTERS TO PROCESS PACKETS FASTER

10. No Checksum of the header – Integrity by Link Layer and Transport Layer checksums

11. No packet fragmentation – packet fragmentation is handled by issuing an ICMP msg

12. TTL has been changed to a Hop Limit so queing delays do not need to be computed

13. Rarely used IPv4 fields have been converted to options

14. PROVIDE BETTER SECURITY

15. IPsec support is mandatory for a conforming IPv6 implementation

17. 20 bit Flow Label field (QoS), 8 Bit Traffic Class (Priority)

18. Failure?

19. SCOPED MULTICASTING

20. Node Local, Link Local, Organizational, Global

21. MOBILE IPv6

22. No Triangular Routing via Routing Option Headers

23. EXTENSIBILITY AND CO-EXISTENCE WITH IPv4

24. Tunnelling

25. EASIER CONFIGURATION OF HOSTS

29. Feature: Scoped Multicasting Flags 0 – Permanent Assignment by IANA 1 – Temporary Assignment

31. When a node first connects to a network, it issues a link-local multicast router solicitation request.

32. Suitably configured routers respond with a router advertisement packet that contains the network layer configuration parameters.

33. Alternatives: DHCPv6 or Static Host Configuration

35. Option Encoding for Hop By Hop & Destination Options Special Case: Padding by 1

36. Option Encoding (cont…)

37. EXTENSION HEADERS HOP-BY-HOP OPTIONS

38. EXTENSION HEADERS HOP-BY-HOP OPTIONS - Jumbograms The hop-by-hop extension header for large datagrams (Jumbograms) 1ST BYTE: WHAT KIND OF HEADER COME NEXT 2ND BYTE: LENGTH OF HEADER IN BYTES EXCLUDING THE FIRST 8 MANDATORY BYTES 3RD BYTE: TELLS THAT THIS OPTIONS DEFINES THE DATAGRAM SIZE (code194) 4TH BYTE: SIZE IS A 4-BYTE NUMBER LAST 4 BYTES: SIZE OF THE DATAGRAM

41. Type 0 Routing Header

43. FIELDS THAT NEED ONLY BE INTERPRETED AT THE DESTINATION HOST

44. NO CURRENT USE DEFINED

45. AUTHENTICATION HEADER

46. PROVIDES A MECHANISM FOR RECEIVER TO MAKE SURE WHO SENT IT

47. ENCRYPTED SECURITY PAYLOAD

49. Large scope for extension of the protocol

51. [RFC 3775] Johnson, D., Perkins C., Arkko J., “Mobility Support in IPv6”, June 2004. URL: http://tools.ietf.org/html/rfc3775

52. Tanenbaum, Andrew S., Computer Networks, Fourth Edition, Chapter 5, The Network Layer