The document discusses IPv6 and transitioning from IPv4 to IPv6. Some key points include: - IPv6 addresses larger address space and other improvements over IPv4 like more efficient routing and built-in security. - Transition technologies like IPv6 over IPv4 tunneling can help transition from IPv4 to IPv6 networks. - There are some valid concerns about transitioning like needing larger packet headers but overall the benefits of IPv6 outweigh these issues. Proper hardware support can alleviate performance concerns.

1. IPv6 o no IPv6 - ¿Qué hacer? -
Recargar
Dr. Eduardo Castro Martínez
Microsoft MVP
ecastro@mswindowscr.org
http://comunidadwindows.org
http://tiny.cc/comwindows
http://ecastrom.blogspot.com

2. Session Objectives And Takeaways
• Session Objective(s):
– Identify the deployment blockers when deploying
IPv6
– Explain how to solve those blockers
– Recommend a staged migration

3. Agenda
• To
• IPv6…
• Or
• Not
• To
• IPv6…
• Q&A

4. IPv6 Fundamentals
• Introduction to IPv6
• Unicast IPv6 Addresses
• Configuring IPv6

5. IPv4 Limitations
The limitations of IPv4 are:
• Limited number of addresses
• Routing difficult to manage
• Host configuration is complex
• No built-in security
• Limited quality of service

6. IPv6 Improvements
Improvements in IPv6 include:
• Larger address space
• More efficient routing
• Simpler host configuration
• Built-in security
• Better prioritized delivery support
• Redesigned headers for efficient processing and
extensibility

7. IPv6 Address Space
The IPv6 address space is:
• 128 bits
• Extremely large
• Allows routing flexibility

8. IPv6 Address Syntax
IPv6 addresses are:
• Displayed in hexadecimal
• Can use zero compression
• Use a prefix to define the network portion of the address
rather than a subnet mask
Examples:
2001:0DB8:0000:0000:02AA:00FF:FE28:9C5A/64
2001:DB8:0:0:2AA:FF:FE28:9C5A/64
2001:DB8::2AA:FF:FE28:9C5A/64

9. Transition Technologies
Application Layer
A
Query
A Query
Transport Layer (TCP/UDP
AAAA
Query IPv6 IPv4
No Global IPv6
At Least 1 Global IPv6
Address
Address
DNS Server Network Interface Layer

10. IPv6 over IPv4 Tunneling
Host-to-Router or Router-
Host-to-Host
Router to Router
to-Host
IPv4 Infrastructure
IPv4 Infrastructure IPv4 or IPv6 or IPv6
IPv4
Node AA IPv4 or IPv6
IPv4 Infrastructure Infrastructure B Node B
Node Node A
Infrastructure Infrastructure Node Node B
IPv6 over IPv4 tunnel
IPv6 over IPv4 tunnel IPv6 over IPv4 tunnel
IPv6/IPv4 IPv6/IPv4
Router Router
IPv6/IPv4
IPv6/IPv4 IPv6/IPv4 IPv6
Router IPv6
IPv6/IPv4 IPv6

11. To IPv6 or Not To IPv6
• How many times have you been asked on how to disable
IPv6?

12. To IPv6 or Not To IPv6
• CSS – in Particular CTS gets a lot of Support calls
regarding IPv6

13. To IPv6 or Not To IPv6
• Microsoft Internal People are „bombing“ aliases with
queries regarding IPv6…

14. To IPv6 or Not To IPv6
• But why do all these people try to disable this feature?
– Even Microsoft Internal people…

15. To IPv6 or Not To IPv6
• Most Modern Operating Systems Support IPv6… Ours…
Vista+
– Apple (10.3), MAC OS X Leopard, BSD, HP-UX 22iv2,
AIX 6, Linux 2.6 Kernel and Solaris 2.10

16. To IPv6 or Not To IPv6
• Let´s work on those points

17. To IPv6 or Not To IPv6
• Let´s work on those points

18. To IPv6 or Not To IPv6
• Let´s work on those points

19. To IPv6 or Not To IPv6
• Let´s work on those points

20. To IPv6 or Not To IPv6
• Let´s work on those points

21. To IPv6 or Not To IPv6
• Let´s work on those points

22. To IPv6 or Not To IPv6
• Let´s work on those points

23. To IPv6 or Not To IPv6
• Let´s work on those points

24. To IPv6 or Not To IPv6
• There are some „valid“ points tough…

25. To IPv6 or Not To IPv6
• There are some „valid“ points tough…
www.microsoft.com/ipv6

26. To IPv6 or Not To IPv6
• There are some „valid“ points tough…

27. To IPv6 or Not To IPv6
• There are some „valid“ points tough…

28. To IPv6 or Not To IPv6
• There are some „valid“ points tough…
A bigger header is necessary due to the 128 bit IPv6
addresses but is not the only factor for network
performance.
Other factors, such as a fixed-size header and negotiable
MTUs help optimize forwarding and provide a better
payload/header ratio.
A bigger problem in reality is that IPv6 is slow because
there’s hardware offload support for IPv4 but not for IPv6
(e.g. in server NICs doing TCP checksum offload). Once
similar offload support is provided for IPv6, there will be no
comparative difference.

29. To IPv6 or Not To IPv6
Final Word…
“Implementing IPv6 has consumed less than 1 percent
of our IT budget, and the IT budget is only a small
part of the overall corporate budget. These costs are
modest compared to the expected benefits.”
Fred Wettling, Bechtel Fellow and Technology
Strategy Manager, Bechtel Corporation

30. IPv6 Resources
• IPv6 Web Site: www.microsoft.com/ipv6
• IPv6 Blog Site: http://blogs.technet.com/ipv6/
• Support Aliases: ipv6, nettalk
• Get Ready for IPv6? Ranjana Jain IT Pro Evangelist
Microsoft India

31. Related Content
• Breakout Sessions/Chalk Talks
– SVR202 IPv6 Field Kits for Services Personnel –
Providing End-to-End IPv6 Services to our Clients