What is IPv6? - Difference Between IPv6 and IPv4

The transition period from IPv4 to IPv6 on the Internet will not be an overnight job.  This means that for sending IPv6 packets over IPv4 topologies there must be a logical technique.  This technique is called “IPv6 Tunnelling,” sometimes referred to as encapsulation.  Tunnelling is the routing of IPv6 packets over IPv4 topologies.  Currently there is six main ways of tunnelling IPv6 packets over IPv4 infrastructures. 

• 6-to-4 Tunnelling
• Automatic Tunnelling
• Manual Tunnelling
• 6-over-4 Tunnelling
• Teredo Tunnelling
• ISATAP Tunnelling

Other tunnelling techniques do exist but for the sake of importance they will not be discussed in this article.

LLjitsch van Beijnum, Running IPv6 2006, CA: USA, Apress, 2006, pp. 33.

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