1. IPv4 to IPv6 Migration strategies

2. 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

3. 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.

4. 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

5. 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

6. What’s 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)

7. 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.

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

9. 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

10. Pictorial explanation of Migration

11. Thank You!