Subject: Re: can't raise in kernel pppoe0 with mtu > 1460
To: Matthias Scheler <tron@zhadum.de>
From: Michael Graff <explorer@flame.org>
List: tech-net
Date: 03/22/2005 13:25:32
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On Tuesday 22 March 2005 13:15, Matthias Scheler wrote:
> That cannot work because the IP and TCP header need at least 40 bytes.
> The minimum reasonable value for MSS clamping is MTU - 40. But
> according to my experience it's better to MTU - 52 to leave room
> for TCP options.
Too bad the option can't be "mtufix" or something, and ipf would look at th=
e=20
interface MTU, the TCP options in use, and do the right thing :)
=2D-Michael
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