From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 5FAA58E83 for ; Tue, 20 Oct 2015 08:05:45 +0200 (CEST) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP; 19 Oct 2015 23:05:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,706,1437462000"; d="scan'208";a="797687197" Received: from dufan-mobl.ccr.corp.intel.com (HELO [10.238.129.179]) ([10.238.129.179]) by orsmga001.jf.intel.com with ESMTP; 19 Oct 2015 23:05:43 -0700 Message-ID: <5625D9B6.3010409@intel.com> Date: Tue, 20 Oct 2015 14:05:42 +0800 From: "Du, Fan" User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: users@dpdk.org Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Cc: discuss@openvswitch.org Subject: [dpdk-users] ARP reply packet fail to transmit on the wire on 82599ES X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Oct 2015 06:05:45 -0000 hi dpdk and ovs experts My test bed is pretty simple, setup host1 and host2 with following topology. I use dpdk-2.0.0 with ovs head commit. On host1: kvm guest1 -> dpdkvhostuser -> br-int -> vxlan port -> br-ex -> dpdk port ifconfig br-ex 192.168.1.2/24 On host2: kvm guest2 -> dpdkvhostuser -> br-int -> vxlan port -> br-ex -> dpdk port ifconfig br-ex 192.168.1.4/24 All ovs bridge are on user space, both hosts are connected with DAC using 82599ES, the first packet between guest1 and guest2 triggers arp resolution for the vxlan outer mac address for br-ex ip address. tcpdump on host1 br-ex with dummy device: 09:32:58.393875 ARP, Request who-has 192.168.1.4 tell 192.168.1.2, length 28 tcpdump on host2 br-ex with dummy device: 21:21:31.766201 ARP, Request who-has 192.168.1.4 tell 192.168.1.2, length 46 21:21:31.766273 ARP, Reply 192.168.1.4 is-at 90:e2:ba:64:f4:05, length 46 It's wired that host1 failed receive ARP Reply packet from host2, so guest1 and guest2 cannot talk to each other. When I replace dpdk port with normal net device ens803f1 using the same NIC physical port, two guests talk to each other well. After some digging, the ARP reply packet did reach on ixgbe tx_pkt_burst function, whether or not RTE_IXGBE_INC_VECTOR is set, ARP reply packet didn't show on wire. This looks like a bug to me, or am I missing something somewhere obviously. Any suggestions and pointers is appreciated.