From owner-freebsd-net@FreeBSD.ORG Wed Apr 29 13:32:22 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 CAD42106567E for ; Wed, 29 Apr 2009 13:32:22 +0000 (UTC) (envelope-from ndenev@gmail.com) Received: from qw-out-2122.google.com (qw-out-2122.google.com [74.125.92.25]) by mx1.freebsd.org (Postfix) with ESMTP id 7EB238FC28 for ; Wed, 29 Apr 2009 13:32:22 +0000 (UTC) (envelope-from ndenev@gmail.com) Received: by qw-out-2122.google.com with SMTP id 3so868381qwe.7 for ; Wed, 29 Apr 2009 06:32:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:from:to :content-type:content-transfer-encoding:mime-version:subject:date :x-pgp-agent:x-mailer; bh=meXY6oyh6RBEbR8uaOxdtu69Kmw8YpIjUkrqILwUhSc=; b=osHH64+OENWoTNOiopE4NLWFhFybfyc4pCJae0ABrEzoK1nR0sDiu5020sIh18in0Z atrERlQQBVwL2wnKI4O+JquUYXs0V3/mRBDtHAEgjG5mBwVmX/HzEurhGmRCFcB46Czy 06OLB9HG495fwugTCBrr29MZdxh2LaTC/E0eo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:content-type:content-transfer-encoding :mime-version:subject:date:x-pgp-agent:x-mailer; b=GoxPvW0ok8YInXBlYrEcBb9r1Q2ELTxecTpWMo9bq41/1603xidGBhiL7kSMNsRhQv M2VO3Y8w6ox+PqDOSqHuvTNKFFI8KNkmOasquJXfogIdUanVQRgNXuN2NoH5hRZKt78i Zbyov6+uo59O9hgNzQzlDssCismK6j7HkGicg= Received: by 10.231.19.75 with SMTP id z11mr159565iba.0.1241009944457; Wed, 29 Apr 2009 05:59:04 -0700 (PDT) Received: from ndenev.cmotd.com (blah.sun-fish.com [217.18.249.150]) by mx.google.com with ESMTPS id 5sm3142891yxt.44.2009.04.29.05.59.02 (version=TLSv1/SSLv3 cipher=RC4-MD5); Wed, 29 Apr 2009 05:59:03 -0700 (PDT) Message-Id: <5E915E92-2B82-4331-9493-739568CC6E8C@gmail.com> From: Nikolay Denev To: freebsd-net@freebsd.org Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Apple Message framework v930.3) Date: Wed, 29 Apr 2009 15:58:57 +0300 X-Pgp-Agent: GPGMail 1.2.0 (v56) X-Mailer: Apple Mail (2.930.3) Subject: bce(4) sees all incoming frames as 2026 bytes in length 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: Wed, 29 Apr 2009 13:32:23 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I have the following problem with the new bce(4) driver on a 7.2-=20 PRERELEASE from a few days ago. When I run tcpdump on the bce interface on the machine, all incoming =20 frames are shown as 2026 in size, but on the sending machine tcpdump reports that it's sending frames of =20= the correct size. This looks very strange because I don't have enabled Jumbo Frames on =20 this bce interface , and it is still with it's default MTU of 1500 =20 bytes. When I tried to capture the packets, they are zero padded to the 2026 =20= frame size. The checksums are correct, so I suspect a driver bug? P.S.: I experience this problem on several machines with bce =20 interfaces, and on all of them tcpdump sees all incoming frames with =20 length of 2026 bytes. Regards, Niki Denev -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.11 (Darwin) iEYEARECAAYFAkn4TxIACgkQHNAJ/fLbfrmBKgCgkJ6j//+lLrrb+dL3HcLmDxym 4mQAn1qaY41CxWHiVthhCs6lYblX6UMd =3D+9XA -----END PGP SIGNATURE-----