When I created devstack environment to test Ironic, I got exactly same error.
2015-09-14 14:58:59.044 DEBUG neutron.agent.linux.utils [req-59679578-c564-488f-8331-c8f61e2e5c0b None None] Running command (rootwrap daemon): ['ovs-vsctl', '--timeout=10', '--oneline', '--format=json', '--', '--columns=name,other_config,tag', 'list', 'Port', 'tapea890f2b-7c'] from (pid=29175) execute_rootwrap_daemon /opt/stack/neutron/neutron/agent/linux/utils.py:102 2015-09-14 14:58:59.091 DEBUG neutron.agent.linux.utils [req-59679578-c564-488f-8331-c8f61e2e5c0b None None] Command: ['ovs-vsctl', '--timeout=10', '--oneline', '--format=json', '--', '--columns=name,other_config,tag', 'list', 'Port', u'tapea890f2b-7c'] Exit code: 0 from (pid=29175) execute /opt/stack/neutron/neutron/agent/linux/utils.py:157 2015-09-14 14:58:59.092 ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-59679578-c564-488f-8331-c8f61e2e5c0b None None] invalid literal for int() with base 10: 'None' Agent terminated! 2015-09-14 14:58:59.109 INFO oslo_rootwrap.client [req-59679578-c564-488f-8331-c8f61e2e5c0b None None] Stopping rootwrap daemon process with pid=29343
When I created devstack environment to test Ironic, I got exactly same error.
2015-09-14 14:58:59.044 DEBUG neutron. agent.linux. utils [req-59679578- c564-488f- 8331-c8f61e2e5c 0b None None] Running command (rootwrap daemon): ['ovs-vsctl', '--timeout=10', '--oneline', '--format=json', '--', '--columns= name,other_ config, tag', 'list', 'Port', 'tapea890f2b-7c'] from (pid=29175) execute_ rootwrap_ daemon /opt/stack/ neutron/ neutron/ agent/linux/ utils.py: 102 agent.linux. utils [req-59679578- c564-488f- 8331-c8f61e2e5c 0b None None] name,other_ config, tag', 'list', 'Port', u'tapea890f2b-7c'] neutron/ neutron/ agent/linux/ utils.py: 157 plugins. ml2.drivers. openvswitch. agent.ovs_ neutron_ agent [req-59679578- c564-488f- 8331-c8f61e2e5c 0b None None] invalid literal for int() with base 10: 'None' Agent terminated! client [req-59679578- c564-488f- 8331-c8f61e2e5c 0b None None] Stopping rootwrap daemon process with pid=29343
2015-09-14 14:58:59.091 DEBUG neutron.
Command: ['ovs-vsctl', '--timeout=10', '--oneline', '--format=json', '--', '--columns=
Exit code: 0
from (pid=29175) execute /opt/stack/
2015-09-14 14:58:59.092 ERROR neutron.
2015-09-14 14:58:59.109 INFO oslo_rootwrap.