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To: Bill Fenner <fenner@parc.xerox.com>
cc: Poul-Henning Kamp <phk@freefall.freebsd.org>,
        CVS-committers@freefall.freebsd.org, cvs-all@freefall.freebsd.org,
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Subject: Re: cvs commit: src/sys/net if_tun.h 
In-reply-to: Your message of "Wed, 04 Dec 1996 10:10:21 PST."
             <96Dec4.101026pst.177711@crevenia.parc.xerox.com> 
Date: Wed, 04 Dec 1996 19:56:49 +0100
Message-ID: <4197.849725809@critter.tfs.com>
From: Poul-Henning Kamp <phk@critter.tfs.com>
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In message <96Dec4.101026pst.177711@crevenia.parc.xerox.com>, Bill Fenner write
s:
>In message <199612031549.HAA23417@freefall.freebsd.org>you write:
>>  Branch:      sys/net   RELENG_2_2
>>  Modified:    sys/net   if_tun.h
>
>I'm a little uncomfortable with this; merging a default-tunnel-device-MTU-chan
>ge into 2.2 without any testing outside of whistle probably has more implicati
>ons than we want.  Notably, peoples' ppp connections are going to start out wi
>th an interface MTU of 1600, where most paths on the Internet have an MTU of 1
>500.  This will exercise the PMTU discovery code a lot more and is probably no
>t something we want to do without testing in -current for longer.
>
>I'd like to change the default back to 1500, and modify if_tun.c so that it re
>spects the MTU of the interface instead of using the constant.  That way, appl
>ications can set the MTU with TUNSIFINFO or SIOCSIFMTU and get whatever MTU th
>ey want, and the default stays a conservative 1500.

Sorry I misunderstood then.  I thought it was the max allowed, not the 
default MTU.

Yes, this is backing out then.
--
Poul-Henning Kamp           | phk@FreeBSD.ORG       FreeBSD Core-team.
http://www.freebsd.org/~phk | phk@login.dknet.dk    Private mailbox.
whois: [PHK]                | phk@tfs.com           TRW Financial Systems, Inc.
Power and ignorance is a disgusting cocktail.