Hi all,

I am new in embedded systems and trying to add support the ipv6 network availability in my new product but I have understood that,

First of all, My system is connected to IPv4 ISP and I want to communicate with the System with IPv6 address,
So I will require tunnel broker, which will make IPv6 network available for my IPv4 PC.
So when I am trying to communicate with the system IPv6 network my data(packets) will be sent through the tunnel broker which will work as NAT and drop the IPv4 header and forward the IPv6 header and data to the IPv6 network

But I have a doubt that,
If my PC has a IPv4 address and I am trying to communicate with the system with IPv4 address then will my packets(data) be transferred through the tunnel broker.

Thanks for your suggestions in advance.

No, a tunnel does not work at all like NAT. You will be given a valid IPv6 network by your tunnel broker, so all your hosts will have valid, routable IPv6 addresses. IPv6 packets bound for other networks will, as you say, be encapsulated inside IPv4 packets and sent (tunneled) to a tunnel broker point-of-presence. The IPv6 packet will then be de-encapsulated and sent via IPv6 to its destination.

You will have direct IPv6 endpoint-to-endpoint communication (remember to adjust firewall settings accordingly), but all IPv6 traffic will take a slight detour through the infrastructure of the tunnel provider.

The tunnel can only encapsulate IPv6 datagrams, so the flow of IPv4 packets is not affected.

Thanks ser olmy,

I was confused between NAT and Tunnel Broker working.

Thanks for helping me through.