On 11/25/09 9:52 AM, "Hui Deng" <[email protected]> wrote:
> 
> if the application generate IPv4 packet, and finally you will be use
> IPv6 to transmit this packet,
> isn't this a translation?
> 
> --> No, this is tunneling. You preserver the v4 header. If header compression
> removes it, it it put back in place on the receiving side
> 
> Secondly, when the receiver host got this packet, how could he know
> this is normal IPv6 packet
> or IPv4-translated-IPv6 packet?
> 
> --> This is not translated, but tunneled. The packet arrives to a tunnel
> interface that will de-capsulate the v6 header and present the v4 packet to
> the v4 app. Think about 6to4 or 6rd, but with the reverse encap.
> 
>     - Alain.
> 

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