I have the same issue except I'm installing with puppet not juju and I'm using Ubuntu Cloud Archive:
root@openstack-puppet-test:/var/log/openvswitch# apt-cache policy openvswitch-switch openvswitch-switch: Installed: 2.4.0-0ubuntu4~cloud0 Candidate: 2.4.0-0ubuntu4~cloud0 Version table: *** 2.4.0-0ubuntu4~cloud0 0 500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ trusty-updates/liberty/main amd64 Packages 100 /var/lib/dpkg/status ** Changed in: openvswitch (Ubuntu) Status: New => Confirmed ** Changed in: openvswitch (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1453062 Title: ovs-vsctl fails with Protocol error until restarted To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/1453062/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs