From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f180.google.com (mail-qk0-f180.google.com [209.85.220.180]) by dpdk.org (Postfix) with ESMTP id 35F363772; Wed, 29 Aug 2018 04:58:51 +0200 (CEST) Received: by mail-qk0-f180.google.com with SMTP id z78-v6so2467189qka.0; Tue, 28 Aug 2018 19:58:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc; bh=vmBIk7qXckyz7Kv35Jf1le15K3fwTh0gJ0RKXrbJ82s=; b=kXAMktpWSp14Y3l/73n9WYbeaElu0ReryVD5iLaytLAJJ/YAVJMlhWhDlO/uPz0Y7u U9DEAE8Bxkq02ROIoJgWTer5Ij93xDLfptwKDCWwnpNzMf12syMlsIFXyU5Z7nkTSdNj NBWaaVL6eTeOxxwAG+Dz1iIFy6NlKOo8makyP6ZuvD5ZRpTgRLIHgNMygjrcIlTlrjvz uZe4mjJ5NvTB5tuoIWWnplrNQtXmHwvBQU0p9RvLMG42eHk4iLZHF/ET6uHIb1PdDOzU 8J0EVIJZ1e0W4M/401bJHpzlxmif0xTepMwt8h1HpTWzkwbCdPxqgw/KeONwDyPGjAeX A8kw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=vmBIk7qXckyz7Kv35Jf1le15K3fwTh0gJ0RKXrbJ82s=; b=HoswSlwM/2pBam3ChJkp7YtIkJMsj7a9GG77Wzol2j34sM3ljuttS4nl2JhG5uOelA 1ZNNfV8qPqSGHO4abbMuTQwaQJmshx6sfLJmmbrGKne0dcqTnvjGfMwXy5M/9N+rWABD sPgS30/htGnQ4zCQ4RGe2qR/bjQOobO0Lr1FGDT87eSLRGuVZShzO0yNuKQEGwF+yy/G bC0JUuBPbdR4aPVpnRZDhv+ZEdT0IzsZvO+kNEmfHOsrgqUxSIM7CTmn2kSb7tjVjJVt gBPGn0jPhDpQWsdYF3f51GN73JgXpH+BjbhrEIafd4+EoTRSgeFkpIWM25CqS76V3vQs +1sQ== X-Gm-Message-State: APzg51DfkeB7+6K6+Wm3qaA2iapf1xe8P0/3cGCV9vMQ9evReJM3KJ5i C08mQsI0atPFV7H4W8oJeE9obNGYX3g0GG6YsPpM8w== X-Google-Smtp-Source: ANB0VdYrFS5dE1szXSkcXuP4YoRJKyBxGHsCrO5ceJ0E+IkXTARSXss1OUPVR2C0tkEp5Wb9wwWJxpMQl2pF1rBm8wk= X-Received: by 2002:a37:a7c5:: with SMTP id q188-v6mr4546849qke.146.1535511530294; Tue, 28 Aug 2018 19:58:50 -0700 (PDT) MIME-Version: 1.0 From: Anupama Laxmi Date: Wed, 29 Aug 2018 08:28:38 +0530 Message-ID: To: users-request@dpdk.org Cc: users@dpdk.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-users] UDP bad checksum errors for packets sent by DPDK application X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Aug 2018 02:58:51 -0000 Hi, I am working with Intel 82599 VF.We have used DPDK v1.7 and RHEL 6.2.On the host end we have ixgbe driver and on the guest igb_uio driver.Iam seeing "UDP: bad checksum" messages for the packets sent by my DPDK application to a socket on a remote machine.A capture external to my VMs show that in the failing case Tx UDP checksum is incorrect. ethtool output on the port shows tx-checksumming on.Can the UDP checksum error be related to Hardware checksum offloading. Any thoughts? What else needs to be checked? Best Regards, Anupama