Once the was IPv4 Christian Huitema Architect, Windows

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Once the was IPv4 Christian HuitemaArchitect,
Windows NetworkingMicrosoft Corporation
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Internet the exponentials and the brick wall?

• 1991 something is going to break
• 1992 CIDR is adopted, works starts on IPnG.
• 1994 IPv6 draft is selected
• 1995-1999 IPv6 is developed. Address shortage
  NAT for client/server.
• 2000 peer-to-peer, always-on..

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How will IPv6 change the world?

• Global addressing
• 6464 format 1.8E19 networks, units
• 1E16 networks, assuming IPv4 efficiency
• 1 million networks per human
• 2 networks per sq.ft of Earth (20 per m2)
• Plug and play
• IP networking easier than IPX
• Efficient mobility
• Simple instant-on ad-hoc networking
• Mobile IP, without servers, without dogleg

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Problem 1 Peer-to-peerRTP audio example
P1
P2
Home LAN
Home LAN
Internet
NAT
NAT

• With NAT
• Need to learn the address outside the NAT
• Provide that address to peer
• Need either NAT-aware application, or
  application-aware NAT
• May need a third party registration server to
  facilitate finding peers

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Solution 1 Peer-to-peer RTP audio example
P1
P2
Home LAN
Home LAN
Internet
Home Gateway
Home Gateway

• With IPv6
• Just use IPv6 address

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Problem 2 MultipartyConference Example
P1
P2
Home LAN
Home LAN
Internet
NAT
NAT
P3

• With NAT, complex and brittle software
• 2 Addresses, inside and outside
• P1 provides inside address to P3, outside
  address to P2
• Need to recognize inside, outside
• P1 does not know outside address of P3 to inform
  P2

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Solution 2 Multiparty IPv6Conference Example
P1
P2
Home LAN
Home LAN
Internet
Home Gateway
Home Gateway
P3

• With IPv6
• Just use IPv6 addresses

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Problem 3 Ad-hoc networking

• IPv4 media lock 63 sec.
• Try DHCP
• Wait for timeout
• Select AutoNet address
• Conflict detect

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Solution 3 Ad-hoc networking

• IPv6 media lock 1 sec.
• Configure using MAC
• Conflict detect

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Problem 4 Move from cell to cell

• IPv4
• Tell server,
• Packets are relayed through the server

P1
cell B
cell A
Relay
Internet
P2
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Solution 4 Move from cell to cell with IPv6

• IPv6
• Tell server peer
• Packets take direct path

P1
cell B
cell A
Relay
Internet
P2
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If IPv6 is so great, how come it is not there yet?

• Applications
• Need upfront investment, stacks, etc.
• Similar to Y2K, 32 bit vs. clean address type
• Network
• Need to ramp-up investment
• No push-button transition

?
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Transition, with 6to4No dependency on core
Pure Version 6 Internet
Original Version 4 Internet
6to4 Site
6to4 Site
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6to4 addresses1 v4 address 1 v6 network

• Stateless tunnel over the IPv4 network without
  configuration
• The IPv6 address contains the IPv4 address
• Entire campus infrastructure fits behind single
  IPv4 address

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Microsoft Roadmap

• March 1998 gt MSR prototype for NT4.
• March 2000 gt Early developer release for W2K on
  MSDN Web.
• September 2000 gt Full IPv6 Winsock SDK and key
  application support.
• Next phase
• Work on further IPv6 release
• Test and port applications, test the transition
  tools.
• Goal IPv6 and IPv4 parity
• Customer chooses!
• Eventually gt IPv4 becomes legacy

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For More Information

• Microsoft IPv6 white paper
• http//www.microsoft.com/technet/network/ipvers6.a
  sp
• http//www.microsoft.com/windows2000/library/howit
  works/communications/networkbasics/IPv6.asp
• Microsoft IPv6 Tech Preview News
• http//www.microsoft.com/PressPass/press/2000/Mar0
  0/IPv6PR.asp
• Microsoft IPv6 Tech Preview Kit
• http//msdn.microsoft.com/downloads/sdks/platform/
  tpipv6.asp

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Key Messages

• IPv6 direct addressing of all stations enables
  peer-to-peer, conferencing, auto-configuration,
  mobility.
• Transition to IPv6 akin to Y2K (upgrade all SW to
  128-bit addresses)
• To help industry move along this path, MSFT
  released a stack and an SDK for Win2000 MS will
  continue to iterate this based on industry
  feedback

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