Transition to IPv6: make it smooth


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With IPv4 exhaustion companies need to start getting ready for the inevitable migration to IPv6. Preparation is key to go through the transition as smoothly as possible. IP address management ensures that your existing infrastructure is under control and ready for IPv4/IPv6 coexistence, just follow the steps…

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Transition to IPv6: make it smooth

  1. 1. The Global IPAM Company Transition to IPv6: Make it smooth 1
  2. 2. AgendaIPv4 exhaustionWhat is IPv6?What will change with IPv6?Transition to IPv6 & cohabitationEfficientIP’s approach to IPv6 2
  3. 3. IPv4 exhaustionIANA (Internet Assigned Numbers Authority)has assigned the last IPv4 blocks to RIRback in Feb. 2011RIPE NCC plans anIPv4 shortage inEurope somewherein 2012 3
  4. 4. How will IPv6 solve this exhaustion issue?Global idea: « Almost infinite » addressing space.… but: It’s a dog chasing its tail… ISPs are waiting for services to be IPv6 ready… Whereas services are waiting for ISPs to be IPv6 compliant Corporate level There’s no real emergency: ROI, Risks, Advantages? Security : a lot of companies are using proxies/NAT 4
  5. 5. What is IPv6?IPv6 is everything but easy to read: Addresses length: 128 bits Hexadecimal addressesIPv61234:5678:0000:0ABC:00F0:0000:0000:9876IPv4192.168.0.12 5
  6. 6. What is IPv6?An IPv6 address is complex: Adresses are not easy to manipulate Risk of mistakes when manipulating1234:5678:0000:0ABC:00F0:0000:C0A8:01121234:5678:0000:0ABC:00F0::C0A8:01121234:5678:0:ABC:F0:0:C0A8:1121234:5678::ABC:F0:0:C0A8:1121234:5678:0:ABC:F0::C0A8:0112 6
  7. 7. What is IPv6?There may be several addresses perinterface.Three to four addresses are needed: One “loopback” address – where ::1/128 is equivalent to IPv4’s One or many “global unicast” – public unique address Local unique private IP address – private unicast address (like RFC1918) “Link-local” address – never routed and kept on the shared network Multicast 8
  8. 8. What is different with IPv6? 9
  9. 9. What is different with IPv6?With IPv6 two DHCP modes Stateful Configuration (same as IPv4) Stateless Configuration (new with IPv6) IPv6 address assigned by router (through Router Advertisement) DHCP options assigned by the DHCP server 10
  10. 10. What is different with IPv6?Option DHCP router Router option is no longer assigned by the DHCP server It is done by the router, thanks to the Router Advertisement (RA).Static addresses (reservations) No longer based on MAC address DUID (DHCP Unique Identifier) has to be used Only one MAC address of the device + time stamp: 00:01:00:06:46:e2:f8:c2:00:08:74:da:ab:64 May change if OS reinstalled !!! 11
  11. 11. What is different with IPv6?Why use DNS ? IPv6 address looks like this : 2001:4b98:dc0:41:216:3eff:febd:ec57 IPv6 address hard to remember DNS for IPv6: a must have!Forward Zones AAAA or quad-A records for IPv6 instead of A records for IPv4 12
  12. 12. What is different with IPv6?Reverse Zones name space Problem reverse address looks like Hard to configure PTR records manually … once again !!! Source of human errors and problems 13
  13. 13. What is different with IPv6?Managing large subnets with IPv6 Subnet size is /64 (18,446,744,073,709,551,616 IPv6 addresses) Hard to find free or assigned IPs How to avoid fragmentation when delegating rights ? Complex IP address format, hard to remember subnets 14
  14. 14. Transition to IPv6 & cohabitation 15
  15. 15. Transition to IPv6 & cohabitationDeploying IPv6 infrastructures will be done progressively  IPv6 networks  IPv6 Operating Systems  IPv6 applicationsA lot of companies would like to keep the existing:  Cost to renew hardware  Cost to renew applications  Training teamsIPv4/IPv6 interoperability is mandatory 16
  16. 16. Transition to IPv6 & cohabitationDual Stack IPv6 / IPv4  Use both IPv4 and IPv6 at the same time  But… complexifies configurations  Requires one IPv4 address per device 17
  17. 17. Transition to IPv6 & cohabitationDNS64  Mapping addresses (A.B.C.D <=> ::FFFF:A.B.C.D)  IPv6-only networks can reach IPv4 resources  Used with NAT64 18
  18. 18. EfficientIP’s approach to IPv6 19
  19. 19. Why adapted tool is mandatory with IPv6No longer possible to use Excel spreadsheet Addresses Difficult to understand…Dealing with 128 bits hosts in DHCP/DNS is: Painful Risky 20
  20. 20. Product Presentation IPAM SubnetsEasy to read, right ?  21
  21. 21. Product Presentation IPAMAnd what about a more human readable format ?Introducing: Compression Labels 22
  22. 22. Product PresentationIPAM Browsing addresses 23
  23. 23. Product PresentationIPAM Browsing free addresses Research through label names 24
  24. 24. Product PresentationDNS Zones and resource records 25
  25. 25. To go further…It’s not a question whether you’ll use IPv6 or not:in the end, you’ll have to.IPv4 will be there for a while: Old devices not upgradeable Not an emergency to migrate corporate IP plansAs time goes, IPv4 will be the exception New assignemnts/deployments will be IPv6 onlyTransitions mechanisms will be more thanwelcome to help managing There’s even RFC only describing those mechanisms ( thing to keep in mind: preparation 26
  26. 26. ConclusionTwo things to keep in mind: Preparation Use the right tools 27
  27. 27. Questions ?Questions ? 28
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