I really don't know why, but 20 bytes is a familiar number:
a TCP ack = 20 bytes
the difference between IPv4 and IPv6 headers = 20 bytes

good luck

On 8/16/06, Denis Vella <[EMAIL PROTECTED]> wrote:
>
>
> Hi,
>
> I've noticed that each packet sent from TCP Agents is shown as having
> increased by 20 bytes at the TCPSink when using new-trace format
> tracefiles.  The same trace output using the older trace format behaves
> completely differently.  I'm using ns2.29.3-allinone.
>
> What is the explanation for this 20 byte increase?
>
> Thanks,
> Denis
>
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Cumprimentos,
Pedro Fortuna

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