netdev - Re: why is IP_MAX_MTU limited to 65520 bytes

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Message-Id: <20090825.163003.153087693.davem@davemloft.net>
Date:	Tue, 25 Aug 2009 16:30:03 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sri@...ibm.com
Cc:	netdev@...r.kernel.org
Subject: Re: why is IP_MAX_MTU limited to 65520 bytes

From: Sridhar Samudrala <sri@...ibm.com>
Date: Tue, 25 Aug 2009 16:25:40 -0700

> Any reason why the maximum IP payload is limited to IP_MAX_MTU(0xFFF0) bytes
> instead of the maximum possible value of 0xFFFF

0xffff is an odd value, IP fragments must be a multiple of
8 bytes, etc. etc.
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