Hi, We use Openstack Wallaby installed through Kolla-ansible on this setup. Here's a quick rundown of the issue we just noticed: -We try popping an instance which fails because of a storage issue. -Nova tries to create the instance on 3 different nodes before failing. -We notice that instances on these 3 nodes and only those instances cannot connect to each other anymore. -Doing Tcpdump tests, we realize that pings are received by each instance, but never replied to. -Restarting the neutron-openvswitch-agent container fixes this issue. I suspect l2population might have something to do with this. Is the ARP table rebuilt when the openvswitch-agent is restarted? -- Jean-Philippe Méthot Senior Openstack system administrator Administrateur système Openstack sénior PlanetHoster inc.