1 OpenStack Summit Vancouver May 2015 IPv6 Fundamentals Jonne Soininen Nokia

2 OpenStack Summit Vancouver May 2015 IPv4 Exhaustion IANA AfriNICAPNICARINLACNICRIPE OrganizationExhaustion DateAddresses remaining IANAFeb 3 rd AfriNICFeb 13 th APNICApr 19 th ARINJul 13 th LACNICJun 10 th RIPE NCCSep 14 th

3 OpenStack Summit Vancouver May 2015 Differences between IPv4 and IPv6 IPv4 32 bits ~ 4 billion addresses Generally one address per interface Address configuration – Static – Dynamic Host Configuration Protocol (DHCP) Address conservation – Calculate addresses – Network Address Translation (NAT) IPv6 128 bits ~ 340 trillion, trillion, trillion addresses Multiple addresses of different scope per interface Address configuration – Static – Stateless Address Autoconfiguration (SLAAC) – DHCPv6 and DHCP prefix delegation A lot of addresses – Calculate prefixes – Not NAT

4 OpenStack Summit Vancouver May 2015 IPv6 Address management Three types of addresses – Link-local, unique local addresses (ULA), globally unique Allocating addresses to end- sites – /64 or bigger – preferably bigger – RIRs advice /56 Address configuration options – Static – SLAAC – DHCPv6 and DHCPv6 PD Different ways to configure other parameters (e.g. DNS) Hos t Network Router Router Solicitation Router Advertisement Duplicate Address Detection

5 OpenStack Summit Vancouver May 2015 Summary IPv6 is different from IPv4 Hosts have multiple addresses There is adequate address space DHCP is not the main method of address allocation

6 OpenStack Summit Vancouver May 2015 IPv6 is the new black! Thank you