From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cathrow Subject: Re: live migration problems. Date: Fri, 30 Mar 2012 17:58:25 -0400 (EDT) Message-ID: <29021590.158.1333144756986.JavaMail.acathrow@0.0.0.0> References: <4F76298B.4020804@cnaf.infn.it> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Riccardo Veraldi Return-path: Received: from mx3-phx2.redhat.com ([209.132.183.24]:33233 "EHLO mx3-phx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935441Ab2C3V6k (ORCPT ); Fri, 30 Mar 2012 17:58:40 -0400 In-Reply-To: <4F76298B.4020804@cnaf.infn.it> Sender: kvm-owner@vger.kernel.org List-ID: ----- Original Message ----- > From: "Riccardo Veraldi" > To: kvm@vger.kernel.org > Sent: Friday, March 30, 2012 5:45:47 PM > Subject: live migration problems. > > Hello, > I have problems with live migration. > I have several VMs in a CentOS 6.2 cluster environment. > > When I migrate one virtual machine from nodeA to nodeB the migration > goes smoothly but > in the same time the VM is migrated an external ping cannot reach the > VM. > I ping the VM before migration and after the migration is done ping > stops to work. > This happens for some VM and does not happen for other VM. > Apparently the VM are configured the same way so I can't understand > why > this is happening. > If I migrate the VM back to the original physical node the ping start > working again like if the switch did not > realize the VM mac address changed switch port. > To make things work always I Should make a ping from the VM console > to > whatever host and > in this case the arp table is updated on the switch. > The strange thing as I said is that some VM seems to always work > after > migration while other > seems never to work untl they are migrated back to original cluster > node. > Any hints or suggestions ? Make sure you have DELAY=0 set in the ifcfg file for the bridge on both hosts. > > thank you very much > > Rick > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >