Subject: Re: IPv6 problem, UltraSparc-specific?
To: Andreas Mueller <firstname.lastname@example.org>
From: Stephane Bortzmeyer <email@example.com>
Date: 06/27/2007 09:04:40
On Tue, Jun 26, 2007 at 11:44:28PM +0200,
Andreas Mueller <firstname.lastname@example.org> wrote
a message of 37 lines which said:
> I fired up my Ultra1 (which has NetBSD 4.0_BETA2 on it), I used the
> same command as you and it doesn't show this problem.
Actually, Pascal Hambourg found the exact cause.
Returns 1 if TCP calculates the outgoing maximum segment
size based on the MTU of the appropriate interface. Oth-
erwise, it is calculated based on the greater of the MTU
of the interface, and the largest (non-loopback) inter-
face MTU on the system.
And the offending machine had a:
% ifconfig pflog0
pflog0: flags=0 mtu 33136
which explains the problem, which is not 64-bits, nor NetBSD 3. (The
PC which does not show the problem did not have pflog0.)