TSB A Policy look at IPv6 Richard hill april 2003 Telecommunication standardization bureau International telecommunication union Based on a paper by John Klensin, available at http:/web/itudoc/itu-t/com2/infodocs/015.html
1 TSB A Policy Look at IPv6 Richard Hill April, 2003 Telecommunication Standardization Bureau International Telecommunication Union Based on a paper by John Klensin, available at: http://web/itudoc/itu-t/com2/infodocs/015.html
TSB O utline What is IPv6 Address space exhaustion Relationship to topology Alternatives to ipv6 · Network problems Space allocation policy Deployment difficulties Roadblocks and solutions · ITU and ipy6 · about the itu
2 TSB Outline • What is IPv6 • Address space exhaustion • Relationship to topology • Alternatives to IPv6 • Network problems • Space allocation policy • Deployment difficulties • Roadblocks and solutions • ITU and IPv6 • About the ITU
TSB What is IPv6 IPv6 (Internet Protocol, version 6)was developed by the Internet Engineering Task Force (ete), starting in 1993, in response to a series of perceived problems, primarily with exhaustion of the current ip version 4 IPv4), address space
3 TSB What is IPv6 • IPv6 (Internet Protocol, version 6) was developed by the Internet Engineering Task Force (IETF), starting in 1993, in response to a series of perceived problems, primarily with exhaustion of the current, IP version 4 (IPv4), address space
TSB Address space exhaustion(1/3) Rate and scale of Internet growth was underestimated In 1970s, 32-bit address space was thought to be adequate for long term Class system(A, B, C) Internet routing is closely tied to the separation of routing within a network and routing between networks
4 TSB Address space exhaustion (1/3) • Rate and scale of Internet growth was underestimated • In 1970’s, 32-bit address space was thought to be adequate for long term • Class system (A, B, C) • Internet routing is closely tied to the separation of routing within a network and routing between networks
TSB Address space exhaustion(2/3) Routing within large networks became complex Sub-netting introduced advent of pcs meant that each host could no longer have a unique fixed ip address dynamic address assignment(but reachability?) private address spaces(but leakage if connected to public network)
5 TSB Address space exhaustion (2/3) • Routing within large networks became complex • Sub-netting introduced • Advent of PCs meant that each host could no longer have a unique fixed IP address – dynamic address assignment (but reachability?) – private address spaces (but leakage if connected to public network)