IPv6 Addressing Plans and Subnetting

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Presentation given by Ferenc Csorba at DKNOG 5 in Copenhagen, Denmark on 13 March 2014

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IPv6 Addressing Plans and Subnetting

  1. 1. March 2014 RIPE NCC | DKNOG4 Copenhagen | Training Services IPv6 Addressing Plans and Subnetting Ferenc Csorba RIPE NCC
  2. 2. Ferenc Csorba - 13 March 2014 RIPE NCC • Located in Amsterdam • Not for profit organisation • One of the 5 Regional Internet Registries RIPE NCC - who are we? 2
  3. 3. Ferenc Csorba - 13 March 2014 5 RIRs 3
  4. 4. Ferenc Csorba - 13 March 2014 We distribute Internet number resources •IP addresses • IPv4 • IPv6 •AS numbers 4
  5. 5. Ferenc Csorba - 13 March 2014 We give training courses •LIR Training Course •RIPE Database Training course •Routing Security Training Course •IPv6 for LIRs Training Course 5
  6. 6. Ferenc Csorba - 13 March 2014 Most Difficult part of the IPv6 course? 6
  7. 7. Ferenc Csorba - 13 March 2014 Philosophy change 7
  8. 8. Ferenc Csorba - 13 March 2014 IPv4 -> IPv6: what philosophy change? 8 How many subnets do I need? Subnet always = /64 How many IP addresses do I need?
  9. 9. Ferenc Csorba - 13 March 2014 What? /64= 2x10^19 addresses? Really? •Why? Autoconfiguration (SLAAC) •Feature of IPv6 Architecture •Conservation? • first 64 bits • not last 64 bits •Enough addresses 9
  10. 10. Ferenc Csorba - 13 March 2014 Think of your heart! Don’t count IP addresses in a subnet! 10
  11. 11. Ferenc Csorba - 13 March 2014 How many subnets do I give my customers? • /64 (1 subnet) • /60 (16 subnets) • /56 (256 subnets) • /52 (4096 subnet) • /48 (65536 subnets) 11
  12. 12. Ferenc Csorba - 13 March 2014 How many customers can I have like this? •4 billion /64’s •268 million /60’s •17 million /56’s •1 million /52’s •65536 /48’s 12
  13. 13. Ferenc Csorba - 13 March 2014 How do customers use these addresses? •Make an addressing plan •/64 for all subnets •Routers: /56 or /52 • give all routers the same size block • minimum /64 per interface • allow growth •Point to point: /64 13
  14. 14. ? 14
  15. 15. 15 More Questions? Come to our 1 day free IPv6 training! Only for RIPE NCC members: www.ripe.net/training
  16. 16. Fin Ende Kpaj Konec Son Fine Pabaiga Einde Fim Finis Koniec Lõpp Kрай Sfârşit Конeц Kraj Vége Kiнець Slutt Loppu Τέλος Y Diwedd Amaia Tmiem Соңы Endir Slut Liðugt An Críoch Fund ‫הסוף‬ Fí Ënn Finvezh The End! Beigas Канeц

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