IPv4 to IPv6 Migration strategies

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IPv4 to IPv6 Migration strategies
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What is IPv4

• Second revision in development of internet
  protocol
• First version to be widely implied.
• Connection less protocol used for packet-switched
  link layer networks (e.g. Ethernet)
• Uses 32 bit addresses which are equivalent to
  4,294,967,296 possible unique addresses

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What is IPv6

• Version designed to succeed IPv4.
• First publicly used IP since 1981.
• Protocol for packet-switched internetworking.
• IPv6 was developed by the Internet Engineering
  Task Force (IETF).
• Uses 128 bit addresses , much bigger than IPv4.

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Introduction

• Global shortage of IP addresses
• IP addresses have greater demands
• Despite NAT (network address translation) IPv4
  addresses are likely to run out in next few years
• Need a fair policy for allocation of remaining IP
  addresses.
• Deployment of IPv6 needed on urgent basis

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Problems of IPv4

• Fixed length, 32 bit scheme
• Managed by IANA
• Low government involvement
• Need for international cooperation
• Policy for addresses was for first come, first
  serve.
• Pre occupation of large amount of addresses by
  early users

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Whats good about IPv6?

• Bigger address space
• No need of NAT
• Full IP connectivity
• Facilitates mobile devices
• Allows roaming between different networks
• Built in security system
• Unicast ,multicast, anycast (types of addresses)

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IPv6 Deployment

• Mobile/wireless connections are growing at very
  fast rate.
• Will provide larger availability of mobile
  networks
• It is good for mobile networks for its low cost,
• Higher speed of deployment
• For wireless, larger IP address is required.

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continued

• Allocation of IPv6 is same as of IPv4.
• Actual conditions are growing fast but still low
  and unbalanced

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Migration to IPv6

• Dual stack (IPv4 and IPv6 running at same time)
• End nodes and routers run both at a time
• Tunneling
• Carry one protocol inside another
• IPv6 encapsulated in IPv4 and sent to portions of
  network
• Protocol translation will translate IPv6 packets
  into IPv4 packets

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Pictorial explanation of Migration
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Thank You!