Hello, We are running Xen 3.0.3 on Red Hat Enterprise Linux 5. We have a couple of paravirtualized systems running Fedora 6 located on a NFS share. The servers we are trying to migrate between are identical and on the same subnet. When we do a live migration from one to the other, the network for the vm drops off. If we log into the console of the vm from the xen server and ping outwards, then the network for the vm starts working again. If we have an ssh session on the vm that is actually doing work (i.e. `find /` ) during the live migration, then the network seems to come up right away on its own. Has anyone else seen this? _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
mail4dla@googlemail.com
2007-Jul-16 16:09 UTC
Re: [Xen-users] Network drops after live migration of PV
What you are experiencing is the effect of the switch caching the information to which of its ports a given MAC address is connected to. It will expire after a certain period of time or if a packet with a MAC address is received through a different port. If you run an output generating process over ssh, this is what happens. If you still have one, connect the two Xen hosts to the same hub and you should no longer experience the network outage. On 7/16/07, Jason Solan <jsolan@jsolan.homelinux.com> wrote:> > Hello, > We are running Xen 3.0.3 on Red Hat Enterprise Linux 5. We have a > couple of paravirtualized systems running Fedora 6 located on a NFS > share. > The servers we are trying to migrate between are identical and on the > same subnet. > When we do a live migration from one to the other, the network for the > vm drops off. If we log into the console of the vm from the xen server > and ping outwards, then the network for the vm starts working again. If > we have an ssh session on the vm that is actually doing work (i.e. > `find /` ) during the live migration, then the network seems to come up > right away on its own. > > Has anyone else seen this? > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users