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Friday 18 September 2020

IPv6 NAT - Needed or not ?

Hi everyone after a long break now we will see about do we need IPv6 NAT or not which will be discussed below.

Network Address Translation (NAT)-Port Translation (PT) for Cisco software based on RFC 2766 and RFC 2765 is a migration tool that helps customers transition their IPv4 networks to IPv6 networks.

It allows direct communication between IPv6-only networks and IPv4-only networks. Dual-stack networks (networks that have IPv4 and IPv6) can have some IPv6-only hosts configured to take advantage of the IPv6 autoconfiguration, global addressing, and simpler management features, and these hosts can use NAT-PT to communicate with existing IPv4-only networks in the same organization.


The benefits of NAT-PT is that no changes are required to existing hosts if NAT-PT is configured, because all NAT-PT configurations are performed at the NAT-PT device. Stable IPv4 networks can introduce an IPv6 network and use NAT-PT to communicate between these networks without disrupting the network.

Why is NAT not needed in IPv6?​

  • Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.​
  • Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​
  • The problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.​
  • The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet.
Stay tuned for more information and also let me know the answer in comment section below for this question mentioned above. 

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