netdev - Re: Gianfar ethernet drop package

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Date:	Mon, 27 Aug 2012 04:08:58 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Aníbal Almeida Pinto <anibal.pinto@...cec.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Gianfar ethernet drop package

On Mon, 2012-08-27 at 11:32 +0100, Aníbal Almeida Pinto wrote:

> I generate the log on the board with tcpdump -i eth0 -w log_eth0.txt and 
> loaded the result on wireshark (on other pc).
> 
> On the wireshark everything appears to be fine don't have nothing that 
> indicate the protocol isn't supported.
> 
> On /etc/protocols is a list with protocols, it there is a place where 
> exist a place with protocols supported by kernel ?

So all frames understood by wireshark are also automatically handled by
your linux machine ? That sounds cool, so we no longer have to add stuff
in the kernel ?

Let me explain again :

For example, if you dont have IPv6 loaded, IPv6 frames wont be handled,
and they appear to be dropped. They really are.

If you run tcpdump/wireshark, these frames are at least delivered once
to a sniffer, so they are not "dropped", even if no protocol handler
actually reacts to them.

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