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Comparison of IPv4 and IPv6 Networks Including Concepts for Deployment and Interworking

INFOTECH Seminar Advanced Communication Services (ACS), 2004 Mentror: Dr. Stephan Rupp. Comparison of IPv4 and IPv6 Networks Including Concepts for Deployment and Interworking. Jesus Ibañez Parra Institute of Communication networks and Computer engineering University of Stuttgart. Agenda.

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Comparison of IPv4 and IPv6 Networks Including Concepts for Deployment and Interworking

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  1. INFOTECH Seminar Advanced Communication Services (ACS), 2004 Mentror: Dr. Stephan Rupp Comparison of IPv4 and IPv6 Networks Including Concepts for Deployment and Interworking Jesus Ibañez Parra Institute of Communication networks and Computer engineering University of Stuttgart ACS Seminar

  2. Agenda • Introduction to IPv6 • Elements of IPv6 • Characteristics of IPv6 • Migration from IPv4 to IPv6 • Conclusions ACS Seminar

  3. Introduction to IPv6 – Why is IPv6 necessary • Growth of Internet becomes a problem • Short Addressing and Routing Tables • NAT and CIDR • IPv4 is too “patched” • Mobile IP • IP Security ACS Seminar

  4. Introduction to IPv6 – Targets of new protocol • Larger Address Space • Autoconfiguration of addresses • Simplified Routing • Better structured options • Improved Security • Support of real-time and Multimedia ACS Seminar

  5. Agenda • Introduction to IPv6 • Elements of IPv6 • Characteristics of IPv6 • Migration from IPv4 to IPv6 • Conclusions ACS Seminar

  6. Elements of IPv6 - Comparison ACS Seminar

  7. Elements of IPv6 – Structure of IPv6 header ACS Seminar

  8. Elements of IPv6 – Format of IPv6 Packet • No limit in the number of options • Better prestations due to the ordering of the headers • Knowledge of behaviour if wrong options ACS Seminar

  9. Elements of IPv6 – Extension Headers (I) ACS Seminar

  10. Elements of IPv6 – Extension Headers (II) • Hop-by-Hop Options • Destination Option • Routing Header • Fragment HeaderOnly in the origin !!! • Authentication Header Authenticity & Integrity • Encapsulating Security Payload (ESP) Header Encryption + Authenticity & Integrity ACS Seminar

  11. Agenda • Introduction to IPv6 • Elements of IPv6 • Characteristics of IPv6 • Migration from IPv4 to IPv6 • Conclusions ACS Seminar

  12. Characteristics of IPv6 - General • Routing Hierarchic, Agregations of Routes • Prestations Simple Header aligned to 64 bits • Versatility Extensible options format • Multimedia Flows Identifier • Multicast Obligatory, improved range control ACS Seminar

  13. Characteristics of IPv6 – Mobility • MIPv6 integrated in the protocol itself • Autoconfiguration -> Foreign Agent not needed • Route Optimization avoids “Triangular Routing” • MIPv4 requires encapsulation.MIPv6 Extension Header • IPv6 provides Network Mobility (NEMO) ACS Seminar

  14. Characteristics of IPv6 – MIPv4 ACS Seminar

  15. Characteristics of IPv6 – MIPv6 (I) ACS Seminar

  16. Characteristics of IPv6 – MIPv6 (II) ACS Seminar

  17. MR maintains a tunnel to HA MR default gateway of the MN Characteristics of IPv6 – NEMO ACS Seminar

  18. Characteristics of IPv6Addressing and Security • IPv6 Addressing • Addressing Model • Autoconfiguration • IPv6 Security ACS Seminar

  19. Characteristics of IPv6 – Addressing Model • 128 bits Addresses assigned to Interfaces, depending on the topology of the network. Changes !!! • Structure of Addresses • Types of Addresses • Unicast: Identifies a single interface • Multicast: Identifies a set of interfaces. Delivery to all interfaces • Anycast: Identifies a set of interfaces. Delivery to one interface ACS Seminar

  20. Characteristics of IPv6 – Autoconfiguration • Stateless Address Autoconfiguration • No manual configuration of the host • Combination of subnet prefix (routers) and interface identifier (MAC-Address) • Stateful Autoconfiguration • Hosts get Address from DHCP Server • Database in Servers with assigned Addresses ACS Seminar

  21. Characteristics of IPv6 – Security • IPv6 provides security integrated (2 Extension Headers) • IPv6 uses IPSec • E2E Technology -> No NAT !!! • Obligatory in all IPv6 nodes • Security implemented in the network layer ACS Seminar

  22. Characteristics of IPv6 – Quality of Service • Integrated in IPv6 (2 fields in Header) • Traffic Class • 2 Types of traffic (User expects answer if congestion/packets are discarded) • 8 levels of priority for each type of traffic • Flow Label • Packets handled by routers like high quality services or real-time traffic ACS Seminar

  23. Agenda • Introduction to IPv6 • Elements of IPv6 • Characteristics of IPv6 • Migration from IPv4 to IPv6 • Conclusions ACS Seminar

  24. Migration from IPv4 to IPv6 • IPv4 and IPv6 are incompatibles • Internet can not be stopped • Heterogeneous networks connected • Transition is a complex duty ACS Seminar

  25. Migration from IPv4 to IPv6Dual Stack • All routers are able to process both protocols • Double Routing Tables in routeres ACS Seminar

  26. Migration from IPv4 to IPv6Tunneling • The IPv6 datagrams are encapsulated with IPv4 to go through networks not migrated yet ACS Seminar

  27. Migration from IPv4 to IPv6Tunneling ACS Seminar

  28. Migration from IPv4 to IPv6NAT/PT IPv4 IPv6 Router with NAT/PT NAT = Network Address Translation, PT = Protocol Translation • Allow communication between only-IPv6 and only-IPv4 systems • Translation is comparable to the “regular” NAT • Same problems “regular” NAT ACS Seminar

  29. Agenda • Introduction to IPv6 • Elements of IPv6 • Characteristics of IPv6 • Migration from IPv4 to IPv6 • Conclusions ACS Seminar

  30. Conclusions • IPv6 solution to problems of Internet Growth • Improved Security,Mobility,Autoconfiguration ... • Allows E2E • Reduces complexity of network administration ACS Seminar

  31. Thank you Any Question ? ACS Seminar

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