From owner-freebsd-net@FreeBSD.ORG Sat Dec 26 22:25:45 2009 Return-Path: Delivered-To: freebsd-net@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2EAC81065672 for ; Sat, 26 Dec 2009 22:25:45 +0000 (UTC) (envelope-from hrs@FreeBSD.org) Received: from mail.allbsd.org (gatekeeper-int.allbsd.org [IPv6:2001:2f0:104:e002::2]) by mx1.freebsd.org (Postfix) with ESMTP id A88238FC0C for ; Sat, 26 Dec 2009 22:25:44 +0000 (UTC) Received: from delta.allbsd.org (p3177-ipbf416funabasi.chiba.ocn.ne.jp [123.225.92.177]) (authenticated bits=128) by mail.allbsd.org (8.14.3/8.14.3) with ESMTP id nBQMPKVZ019859; Sun, 27 Dec 2009 07:25:31 +0900 (JST) (envelope-from hrs@FreeBSD.org) Received: from localhost (alph.allbsd.org [192.168.0.10]) (authenticated bits=0) by delta.allbsd.org (8.13.4/8.13.4) with ESMTP id nBQMPEFf087772; Sun, 27 Dec 2009 07:25:18 +0900 (JST) (envelope-from hrs@FreeBSD.org) Date: Sun, 27 Dec 2009 07:24:23 +0900 (JST) Message-Id: <20091227.072423.122179742.hrs@allbsd.org> To: hyama99@gmail.com From: Hiroki Sato In-Reply-To: <90dbee150912261333l602c4161nccaf1995dc83699a@mail.gmail.com> References: <90dbee150912261333l602c4161nccaf1995dc83699a@mail.gmail.com> X-PGPkey-fingerprint: BDB3 443F A5DD B3D0 A530 FFD7 4F2C D3D8 2793 CF2D X-Mailer: Mew version 6.3 on Emacs 22.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Multipart/Signed; protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="--Security_Multipart(Sun_Dec_27_07_24_23_2009_387)--" Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.95.3 at gatekeeper.allbsd.org X-Virus-Status: Clean X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.3 (mail.allbsd.org [133.31.130.32]); Sun, 27 Dec 2009 07:25:37 +0900 (JST) X-Spam-Status: No, score=-5.7 required=13.0 tests=AWL,BAYES_00, CONTENT_TYPE_PRESENT, SPF_SOFTFAIL, X_MAILER_PRESENT autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on gatekeeper.allbsd.org Cc: freebsd-net@FreeBSD.org Subject: Re: GIF MTU parmeter is needed X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 26 Dec 2009 22:25:45 -0000 ----Security_Multipart(Sun_Dec_27_07_24_23_2009_387)-- Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hideki Yamamoto wrote in <90dbee150912261333l602c4161nccaf1995dc83699a@mail.gmail.com>: hy> Hi, hy> hy> I often use FreeBSD for developing the gateway. For example, I use gif for the hy> tunnel protocol when using IPv6 over IPv4 and use an application for changing hy> packet address for special purpose. When we were using old FreeBSD, such as hy> FreeBSD 4.11, the MTU of the tunnel packets or forwarded packets hy> was not limited into 1280. However, FreeBSD 6,7, and 8 fragments packets hy> by 1280 when using tunnel. The gif(4) interface supports MTU up to 8192 and this has not been changed since FreeBSD 4.X IIRC. Why did you think FreeBSD 6 and later supported a fixed MTU only? -- Hiroki ----Security_Multipart(Sun_Dec_27_07_24_23_2009_387)-- Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEABECAAYFAks2jRcACgkQTyzT2CeTzy3OyQCdFJ5YPPUdhkW+IXAAuYL3/vAE y9YAnApCHddlfzQ5n4QtiAeamjXdbYAe =CBEv -----END PGP SIGNATURE----- ----Security_Multipart(Sun_Dec_27_07_24_23_2009_387)----