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IPv6

IPv6. 발표자 : 전지훈. What is IPv6?. an Internet Layer protocol for packet-switched internetworks.  the "next generation" protocol designed by the IETF to replace the current version Internet Protocol, IP Version 4 ("IPv4"). IETF : Internet Engineering Task Force ( 국제 인터넷 표준화 기구 ).

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IPv6

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  1. IPv6 발표자 : 전지훈

  2. What is IPv6? • an Internet Layer protocol for packet-switched internetworks.  • the "next generation" protocol designed by the IETF to replace the current version Internet Protocol, IP Version 4 ("IPv4"). • IETF : Internet Engineering Task Force (국제 인터넷 표준화 기구)

  3. Why IPv6? • Most of today's internet uses IPv4, which is more then twenty years old. • There is a growing shortage of IPv4 addresses, which are needed by all new machines added to the Internet.

  4. IPv6 Addresses (1/2) • IPv6 increases the IP address size from 32 bits to 128 bits. • 2^32(약43억)개 -> 2^128(약 3.4*10^38)개 • IPv6 Address • 3c1a:0000:000b:e200:0000:0000:3078:e207 • 3c1a:0:b:e200:0:0:3078:e207 • 3c1a:0:b:e200::3078:e207 • 3c1a::b:e200::3078:e207

  5. IPv6 Addresses (2/2) • IPv4mapping address • 147.46.243.123-> ::FFFF:147.46.243.123 • IPv4 mapping addresses allow a host that support both IPv4 and IPv6 to communicate with a host that supports only IPv4.

  6. IPv6 Addresses types (1/2) • Unicast addresses • A unicast address identifies a single network interface. • The protocol delivers packets sent to a unicast address to that specific interface. • Anycast addresses • An anycast address is assigned to a group of interfaces, usually belonging to different nodes. • A packet sent to an anycast address is delivered to just one of the member interfaces, typically the “nearest” according to the routing protocol’s choice of distance.

  7. IPv6 Addresses types (2/2) • Multicast addresses • A multicast address is also assigned to a set of interfaces that typically belong to different nodes. • A packet that is sent to a multicast address is delivered to all interfaces identified by that address.

  8. Version Traffic Class Flow Label Payload Length Next Header Hop Limit Source Address Destination Address IPv6 Headers (1/6)

  9. Version HL Service Fragment Length Datagram ID FLAG Fragment Offset TTL Protocol Header Checksum Source Address Destination Address Options (if any) IPv6 Headers (2/6) • IPv4 Headers

  10. IPv6 Headers (3/6) • No option field • Replaced by extension header. Result in a fixed length, 40-byte IP header. • No header checksum • Result in fast processing. • No fragmentation at intermediate nodes • Result in fast IP forwarding.

  11. IPv6 Headers (4/6) • Version - version 6 (4-bit IP version). • Traffic class - packet priority (8-bits). Priority values subdivide into ranges: traffic where the source provides congestion control and non-congestion control traffic. • Flow label - QoS management (20 bits). Originally created for giving real-time applications special service, but currently unused.

  12. IPv6 Headers (5/6) • Payload length - payload length in bytes (16 bits). • Next header - Specifies the next encapsulated protocol. The values are compatible with those specified for the IPv4 protocol field (8 bits). • Hop limit - replaces the time to live field of IPv4 (8 bits). • Source and destination addresses - 128 bits each.

  13. IPv6 Headers (6/6) • Extension Headers • Routing Header - source routing • Fragmentation Header - supports fragmentation of IPv6 datagrams. • Authentication Header • Encapsulating Security Payload Header

  14. Benefits • Large IP address space • Built on the experiences learned from IPv4 • Efficient backbone routing • Efficient and Extensible IP datagram • Address Autoconfiguration • Security (IPsec mandatory) • Mobility

  15. In the future… (1/2) • 미국 • 미 국방부 - 국방정보망을 IPv6망으로 완전 전환하기 위해 매년 300억 달러 이상의 IT 인프라를 구축. • 미의회 산하 감사국 - 23개 연방정부의 IPv6 전환계획 수립을 촉구. • 미국 예산관리청 - 연방정부에 IPv6로의 전환을 권고함과 동시에 망 전환계획 및 응용서비스 모델 수립을 요청. • EU • 산업체, 공공기관, 가정의 25%가 2010년까지 IPv6를 사용하도록 하는 목표를 설정. • 공공분야 웹사이트와 전자정부 서비스에서 IPv6 사용추진.

  16. In the future… (2/2) • 일본 • 민간 분야에서 IPv6 도입을 단계적으로 추진하고 있으며, 통신사업자들은 상용서비스를 부분적으로 제공 중. • NTT, KDDI 등에서는 IPv6 접속서비스를 일부 제공하고 있으며 향후 기기간 통신, IPTV 등 신규서비스에 IPv6 적용을 확대해 나갈 계획. • 한국 • 2007년 「차세대 인터넷프로토콜(IPv6) 이용 활성화 대책」을 수립, 2010년까지 공공기관의 인터넷 장비를 IPv6로 전환하고, IPv6 이용자를 1,000 만 명 확보를 목표로 관련 기술 개발 및 제도 개선에 주력하고 있음

  17. Reference • http://www.ipv6.org/ • http://www.ietf.org/ • http://en.wikipedia.org/wiki/IPv6 • http://ko.wikipedia.org/wiki/IPv6 • http://www.microsoft.com/korea/technet/network/ipvers6.mspx?pf=true

  18. Any Questions?

  19. Thank you.

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