From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailout4.w1.samsung.com (mailout4.w1.samsung.com [210.118.77.14]) by dpdk.org (Postfix) with ESMTP id 3FF208E8E for ; Mon, 14 Dec 2015 15:54:49 +0100 (CET) Received: from eucpsbgm1.samsung.com (unknown [203.254.199.244]) by mailout4.w1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NZC00EGIS3BVE30@mailout4.w1.samsung.com> for dev@dpdk.org; Mon, 14 Dec 2015 14:54:47 +0000 (GMT) X-AuditID: cbfec7f4-f79026d00000418a-52-566ed8371b92 Received: from eusync4.samsung.com ( [203.254.199.214]) by eucpsbgm1.samsung.com (EUCPMTA) with SMTP id 47.B0.16778.738DE665; Mon, 14 Dec 2015 14:54:47 +0000 (GMT) Received: from fedinw7x64 ([106.109.131.169]) by eusync4.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0NZC00105S3AEF20@eusync4.samsung.com>; Mon, 14 Dec 2015 14:54:46 +0000 (GMT) From: Pavel Fedin To: 'Yuanhan Liu' , 'Peter Xu' References: <000001d133ed$b2446eb0$16cd4c10$@samsung.com> <20151211094934.GX29571@yliu-dev.sh.intel.com> <001c01d133fd$d3a7d870$7af78950$@samsung.com> <20151214035842.GB18437@pxdev.xzpeter.org> <00c401d13641$5e53cf20$1afb6d60$@samsung.com> <20151214090406.GC18437@pxdev.xzpeter.org> <00ec01d13654$5f904c20$1eb0e460$@samsung.com> <20151214120937.GC29571@yliu-dev.sh.intel.com> <20151214130022.GE18437@pxdev.xzpeter.org> <20151214132115.GE29571@yliu-dev.sh.intel.com> In-reply-to: <20151214132115.GE29571@yliu-dev.sh.intel.com> Date: Mon, 14 Dec 2015 17:54:45 +0300 Message-id: <011a01d1367f$5fe56270$1fb02750$@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Mailer: Microsoft Outlook 14.0 Thread-index: AQOYHvn87qB/n3eE/cMtloPRrGw32gEpxH/xAfOP4FMB9WC4FAFeYHxkAbLYJYAClAZBBAJpBrQhAg3I+cQBxhPgCpq1GVXA Content-language: ru X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrOLMWRmVeSWpSXmKPExsVy+t/xa7rmN/LCDN7MZLR492k7k8WWaZNZ Lf7/esVqsWX/N3aLxQcOM1tcn3CB1YHN49eCpawe804Gerzfd5XN43/zVdYAligum5TUnMyy 1CJ9uwSujOZDu9gLHrJXLJ1+kbWBsY+ti5GDQ0LARGLtFYkuRk4gU0ziwr31QGEuDiGBpYwS m9tOMkI43xklvr0+ygpSxSagLnH66wcWEFtEwF/i1rkN7CBFzAKdjBLPrkxhheh4zCyx7/Md NpAqTgFriXXTPjKD2MICvhIvlz5hArFZBFQlXp29yAhi8wpYSrw8Mo0NwhaU+DH5HtgGZgEt ifU7jzNB2PISm9e8ZYa4VUFix9nXjBBXFEjs2/6SHaJGRGLav3vMExiFZiEZNQvJqFlIRs1C 0rKAkWUVo2hqaXJBcVJ6rqFecWJucWleul5yfu4mRkh0fNnBuPiY1SFGAQ5GJR7ejGW5YUKs iWXFlbmHGCU4mJVEeJdcywsT4k1JrKxKLcqPLyrNSS0+xCjNwaIkzjt31/sQIYH0xJLU7NTU gtQimCwTB6dUA6NUoH/GxccsDfxXxDKiOebf+eW1+v7ZWfurfKdzzkp4e1Pqqs2MqsX+S84p rt8z3c3mgvj1+NQQoe+MLdHVeivOn790z+xqb6uilGSCKrv99X0Plz76Fd5/o+VivFmjz4bJ Zy/NLW/l5th1T1Tpg+ia1IZ55y7NnbVr+d653FvWSs1WmaShWbdOiaU4I9FQi7moOBEA/idG lYoCAAA= Cc: dev@dpdk.org, 'Victor Kaplansky' , "'Michael S. Tsirkin'" Subject: Re: [dpdk-dev] [PATCH 0/4 for 2.3] vhost-user live migration support X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Dec 2015 14:54:49 -0000 Hello! > > I _guess_ the problem for ping might be: guest ARP entry for > > 192.168.100.1 is not updated. Or say, after guest migrated to host2 > > from host1, guest is still trying to send packet to host1's NIC (no > > one is telling it to update, right?), so no one is responding the > > ping. When the entry is expired, guest will resend the ARP request, > > and host2 will respond this time, with mac address on host2 provided > > this time. After that, ping works again. > > Peter, > > Thanks for your input, and that sounds reasonable. You just reminded > me that the host1's NIC is indeed different with host2's NIC: the ovs > bridge mac address is different. Yes, this is indeed what is happening, and actually i already wrote about it. In wireshark it looks exactly like that: the some PINGs are sent without replies, then the guest redoes ARP, PING replies resume. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia