From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <Martin.Trommer@rohde-schwarz.com>
Received: from mail02.rohde-schwarz.com (mail02.rohde-schwarz.com
 [80.246.32.97]) by dpdk.org (Postfix) with ESMTP id 942A61F5
 for <users@dpdk.org>; Fri, 19 May 2017 10:45:09 +0200 (CEST)
Received: from amu316.rsint.net ([10.0.26.65]) by mail02.rohde-schwarz.com
 with ESMTP id 2017051910450942-126863 ;
 Fri, 19 May 2017 10:45:09 +0200 
Received: from rus18.rsint.net ([10.0.33.18])
 by amu316.rsint.net (Totemo SMTP Server) with SMTP ID 129
 for <users@dpdk.org>; Fri, 19 May 2017 10:45:06 +0200 (CEST)
Received: from GMU01.rsint.net ([10.0.32.21])
 by RUS14.rsint.net (IBM Domino Release 9.0.1FP8)
 with ESMTP id 2017051910450508-1706 ;
 Fri, 19 May 2017 10:45:05 +0200 
Received: from GMU02.rsint.net (10.0.32.24) by GMU01.rsint.net (10.0.32.21)
 with Microsoft SMTP Server (TLS) id 15.1.396.30; Fri, 19 May 2017 10:45:03
 +0200
Received: from GMU02.rsint.net ([fe80::9d74:da68:ee66:5879]) by
 GMU02.rsint.net ([fe80::9d74:da68:ee66:5879%12]) with mapi id 15.01.0396.037; 
 Fri, 19 May 2017 10:45:03 +0200
From: Martin Trommer <Martin.Trommer@rohde-schwarz.com>
To: "users@dpdk.org" <users@dpdk.org>
Thread-Topic: fm10k - disable minimum ethernet frame size padding /ur/
Thread-Index: AQHS0Hwp0BpVz9ipUEmFf5dNHMcOaw==
Accept-Language: de-DE, en-US
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
x-ms-exchange-messagesentrepresentingtype: 1
x-originating-ip: [10.0.9.40]
MIME-Version: 1.0
X-GBS-PROC: NC0MSxjh12YSO0b0XOc0GYrcpZHpU/UKFTPP9KeGRxk=
X-TNEFEvaluated: 1
X-RUS_SENSITIVITY: 10
Message-ID: <406da3877f694667b56cba8ee40379e3@rohde-schwarz.com>
Date: Fri, 19 May 2017 08:45:03 +0000
X-MIMETrack: Itemize by SMTP Server on RSSMTP02/RSSMTP at 19.05.2017 10:45:09, 
 Serialize by Router on RSSMTP02/RSSMTP at 19.05.2017 10:45:10,
 Serialize complete at 19.05.2017 10:45:10
Content-Language: de-DE
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
X-Content-Filtered-By: Mailman/MimeDel 2.1.15
Subject: [dpdk-users] fm10k - disable minimum ethernet frame size padding
X-BeenThere: users@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK usage discussions <users.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/users>,
 <mailto:users-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/users/>
List-Post: <mailto:users@dpdk.org>
List-Help: <mailto:users-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/users>,
 <mailto:users-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Fri, 19 May 2017 08:45:09 -0000

Hello,

we are using DPDK 16.11.1 and a fm10k card and are on a simple forwarding s=
cenario. The DPDK application is forwading the packets as they are.

Is there a option/workaround to disable Ethernet padding to minimum allowed=
 ethernet size ?

Further, we observed VLAN tagged frames smaller than 64 octets are padded t=
o 68 octets (which is allowed by IEEE 802.1Q, chapter 2.3. b.).
This may be because the card is doing padding to 64 bytes before the VLAN t=
ag is restored, leading to a frame size of 68 bytes.
Is there a way to prevent VLAN tagged frames padded to 68 bytes but to 64 b=
ytes in case padding is necessary ?


Thanks!


Martin