The FF 03 are the address and control fields of a ppp packet. They are
are constant and always there unless using compression, which you are
not during the negotiation phases of the link setup.
Federico Pelizza wrote:
>
> Hallo everybody,
>
> I'm studying the PPP packets and I encounter something strange in the first
> 2 octets that I transmit in every packet.
>
> For example an LCP ConfReq with identifier 1, etc.... looks like
>
> FF 03 C0 21 01 01 ......
>
> So, I know that
>
> C0 21 is the LCP protocol field
>
> 01 ist the code for ConfReq
>
> 01 ist the identifier,
>
> etc......
>
> but what is FF 03 ?????
>
> Thanks a lot to anybody that can help me.
>
> Ciao da FEDE
>
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