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From: "Daniel" <daniel-gson@telia.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Confusion about MTU
Date: Sat, 14 Dec 2002 15:21:58 +0000	[thread overview]
Message-ID: <marc-lartc-103987942806488@msgid-missing> (raw)
In-Reply-To: <marc-lartc-103980574728979@msgid-missing>

Ok, I found it out by myself, it is 1514b.

I set up two length matches in the PREROUTING chain in the mangle table, one
set to match on packets >\x1500b and one >\x1501b. The latter rule never
matched so I thought that the max packet really was 1500b. However I then
decided to put all packets matching the first rule in a separate class.

From there the answer was obvious, I simply divided the byte-count with the
packet-count and voila, I got 1514. So I guess the length match doesn't
count for the 14b's of ethernet encap.

This led me to change another thing in my setup, I no longer match small TCP
packets by matching them by <db but rather <Pb.

Well... this prolly seem real newbie like to most of you but hey we all are
at first.

// Daniel


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      reply	other threads:[~2002-12-14 15:21 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-12-13 18:54 [LARTC] Confusion about MTU Daniel
2002-12-14 15:21 ` Daniel [this message]

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