The Next Version of the Internet (IPv6) begins rolling out from 6th june

Major Internet service providers (ISPs), home networking equipment manufacturers, and web companies around the world are coming together to permanently enable IPv6 for their products and services on 6 June 2012.

Why IPv6 Came ?

Clearly the internet needs more IP addresses. How many more, exactly? Well, how about 340 trillion trillion trillion (or, 340,000,000,000,000,000,000,000,000,000,000,000,000)? That's how many addresses the internet's new "piping," IPv6, can handle. That's a number big enough to give everyone on Earth their own list of billions of IP addresses. Big enough, in other words, to offer the Internet virtually infinite room to grow, from now into the foreseeable future.

Differences IPv4 Vs IPv6

IPv4	IPv6
Addresses are 32 bits (4 bytes) in length.	Addresses are 128 bits (16 bytes) in length
Address (A) resource records in DNS to map host names to IPv4 addresses.	Address (AAAA) resource records in DNS to map host names to IPv6 addresses.
Pointer (PTR) resource records in the IN-ADDR.ARPA DNS domain to map IPv4 addresses to host names.	Pointer (PTR) resource records in the IP6.ARPA DNS domain to map IPv6 addresses to host names.
IPSec is optional and should be supported externally	IPSec support is not optional
Header does not identify packet flow for QoS handling by routers	Header contains Flow Label field, which Identifies packet flow for QoS handling by router.
Both routers and the sending host fragment packets.	Routers do not support packet fragmentation. Sending host fragments packets
Header includes a checksum.	Header does not include a checksum.
Header includes options.	Optional data is supported as extension headers.
ARP uses broadcast ARP request to resolve IP to MAC/Hardware address.	Multicast Neighbor Solicitation messages resolve IP addresses to MAC addresses.
Internet Group Management Protocol (IGMP) manages membership in local subnet groups.	Multicast Listener Discovery (MLD) messages manage membership in local subnet groups.
Broadcast addresses are used to send traffic to all nodes on a subnet.	IPv6 uses a link-local scope all-nodes multicast address.
Configured either manually or through DHCP.	Does not require manual configuration or DHCP.
Must support a 576-byte packet size (possibly fragmented).	Must support a 1280-byte packet size (without fragmentation).

India Move to Ipv6 by 2012

A move to IPv6 will give a boost to Internet adoption in the country. A lot of equipment like refrigerators, air conditioners and television sets with will come onto the IPv6 network and be controlled remotely, creating a potentially large market in India.

Federal and state government ministries and departments and public sector companies will switch over to IPv6 services by March 2012, the government said.

IPv6 is an Internet protocol version that offers a larger address space than the current IPv4. This is because it uses a 128-bit address as compared to 32 bits in IPv4.

India is running out of IP addresses on IPv4, a problem that is likely to get more acute with the upcoming rollout in the country of 3G and broadband wireless access (BWA) services, said Rajesh Chharia, president of the Internet Service Providers Association of India.

JOIN THE LAUNCH!

http://www.worldipv6launch.org  welcome web companies, ISPs, and home router vendors to join the cause and spread the word