From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ua0-f173.google.com (mail-ua0-f173.google.com [209.85.217.173]) by dpdk.org (Postfix) with ESMTP id ACFA25A26 for ; Fri, 12 Aug 2016 23:12:28 +0200 (CEST) Received: by mail-ua0-f173.google.com with SMTP id 97so60841847uav.3 for ; Fri, 12 Aug 2016 14:12:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=tl0F9Xd7e/CVMdJhH5tmkC0MNrgOKMZpwpESnf54MpI=; b=Hv15+xLgtjJPYRbemPvVUCsbdO4HbZbrScHlCfc1JOyb0JLnnnAJ686Ko/0Hc4DSEB jPrb6Xu7yHuyEHDKENpvWlbwj4K+zRiV2C7ohJr8oZlxG8VMPJsAFsVF1F5qC9H6GJmj Ft+6cEq3zRW3llzMjXFJ6wJ80J0dpLE88cmQqjv1CV7r2HH0bCIhx/YA8E8qVNlr3nwX 2Q+QVx8MzPhrd2AIS8x2VVkgk+M00ff5WxG4N6DG4tuaaY6lV5YG+Kyi22xzVSpsQJK+ poQWihJvh5YvBh28nZPLN3IcVWvI6eZhCQLHDPCWNIjYJzWP5rHDY6L4Oq4Z3E7aM/4P +G6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=tl0F9Xd7e/CVMdJhH5tmkC0MNrgOKMZpwpESnf54MpI=; b=gkFB6auPvi6Hx1T/el3RZTfaW+74GnzPZ0vqDrT9e5OEJz7g58tV5eJ0nnVcppLmQ8 9ctbkvzzxikfPE3mQ/ICU4/acrJUazqvYpGdj+xXHIp8kKrD01SSGhCKMyG5VjPJazz6 +p3ySkA0ee9JRtwgm5QdvOWg9rCr/qQ45C+IhWamnwLThXY0/vvrYMwCXCR+ddpxJ7le 9a5epGOh31tePrG/ZJRMkugMTev3sQA8cJwaNFHbZ1bhSr0HzzxPtvfD6ZhTzLMk3Eve j1MnqteHhO2tUYB3nyPWNdEf11dj4W7ig92BNjy7eezguBA7ytCS/a+xC6mz90Oj+8Um OzAQ== X-Gm-Message-State: AEkoouu88VCsspoxnDUZZhgwdfHcB5LpHjEWKGEnjBJZOIFJeEpTzFWbRozdXwCqQOKw9X4BVLCqKogyk2jpOQ== X-Received: by 10.176.69.226 with SMTP id u89mr8952041uau.133.1471036348245; Fri, 12 Aug 2016 14:12:28 -0700 (PDT) MIME-Version: 1.0 Received: by 10.31.148.18 with HTTP; Fri, 12 Aug 2016 14:12:27 -0700 (PDT) In-Reply-To: References: From: Nishant Verma Date: Fri, 12 Aug 2016 17:12:27 -0400 Message-ID: To: Raja Jayapal Cc: "users@dpdk.org" , Nagaratna Patagar Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: Re: [dpdk-users] arp behaviour on dpdk 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: Fri, 12 Aug 2016 21:12:28 -0000 Hi Raja, What i understand is that Br1(linux machine) is getting ARP request but not sending ARP Response? If this is the case, it means either packet is not liked by Br1 hence dropped or some how capture is not right. Can you share pcap file, captured at Br1. On Thu, Aug 11, 2016 at 3:02 AM, Raja Jayapal wrote: > Hi All, > > I am running dpdk on KVM and would like to understand the arp behaviour on > dpdk ports. > The topology is as below. > > br0(192.168.100.10)----> vnet0 -----> dpdk(NIC1- > e1000)------->dpdk(NIC2-e1000)------>vnet1----->br1(192.168.100.20) > > I am sending ARP packet from br0 using PackETH tool destined to br1. > I have edited the dpdk l2fwd code in such a way that , the destination is > broadcast address(ffff). > In br1 , i can see the arp resquest, but the host bridge is not responding > for the arp request. > > In br1: > ===== > tcpdump: verbose output suppressed, use -v or -vv for full protocol decode > listening on br1, link-type EN10MB (Ethernet), capture size 65535 bytes > 12:21:15.459667 ARP, Request who-has 192.168.100.20 (00:0a:e7:2c:44:2b > (oui Unknown)) tell 192.168.100.10, length 46 > 12:21:15.651610 ARP, Request who-has 192.168.100.20 (00:0a:e7:2c:44:2b > (oui Unknown)) tell 192.168.100.10, length 46 > 12:21:15.867692 ARP, Request who-has 192.168.100.20 (00:0a:e7:2c:44:2b > (oui Unknown)) tell 192.168.100.10, length 46 > > In l2fwd application example also, the arp packets are getting received on > the adjacent ports, but the arp reply has not been sent back from br1. > > Could you please let me know how to make the host(br1) to reply the arp > request. > > Thanks, > Raja > > =====-----=====-----===== > Notice: The information contained in this e-mail > message and/or attachments to it may contain > confidential or privileged information. If you are > not the intended recipient, any dissemination, use, > review, distribution, printing or copying of the > information contained in this e-mail message > and/or attachments to it are strictly prohibited. If > you have received this communication in error, > please notify us by reply e-mail or telephone and > immediately and permanently delete the message > and any attachments. Thank you > > > -- Rgds, Nishant