q-agt error log

Stdout: ''
Stderr: '' from (pid=37026) execute /opt/stack/neutron/neutron/agent/linux/utils.py:81
2014-10-09 14:41:36.713 DEBUG neutron.agent.linux.utils [req-266e647a-f834-49d7-a196-7c5b24d567bc None None] Running command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ovs-vsctl', '--timeout=10', 'get', 'Interface', 'patch-tun', 'ofport'] from (pid=37026) create_process /opt/stack/neutron/neutron/agent/linux/utils.py:46
2014-10-09 14:41:36.966 DEBUG neutron.agent.linux.utils [req-266e647a-f834-49d7-a196-7c5b24d567bc None None]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ovs-vsctl', '--timeout=10', 'get', 'Interface', 'patch-tun', 'ofport']
Exit code: 0
Stdout: '-1\n'
Stderr: '' from (pid=37026) execute /opt/stack/neutron/neutron/agent/linux/utils.py:81
2014-10-09 14:41:36.967 DEBUG neutron.agent.linux.utils [req-266e647a-f834-49d7-a196-7c5b24d567bc None None] Running command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ovs-vsctl', '--timeout=10', 'add-port', 'br-tun', 'patch-int', '--', 'set', 'Interface', 'patch-int', 'type=patch', 'options:peer=patch-tun'] from (pid=37026) create_process /opt/stack/neutron/neutron/agent/linux/utils.py:46
2014-10-09 14:41:37.627 DEBUG neutron.agent.linux.utils [req-266e647a-f834-49d7-a196-7c5b24d567bc None None]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ovs-vsctl', '--timeout=10', 'add-port', 'br-tun', 'patch-int', '--', 'set', 'Interface', 'patch-int', 'type=patch', 'options:peer=patch-tun']
Exit code: 0
Stdout: ''
Stderr: '' from (pid=37026) execute /opt/stack/neutron/neutron/agent/linux/utils.py:81
2014-10-09 14:41:37.629 DEBUG neutron.agent.linux.utils [req-266e647a-f834-49d7-a196-7c5b24d567bc None None] Running command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ovs-vsctl', '--timeout=10', 'get', 'Interface', 'patch-int', 'ofport'] from (pid=37026) create_process /opt/stack/neutron/neutron/agent/linux/utils.py:46
2014-10-09 14:41:38.274 DEBUG neutron.agent.linux.utils [req-266e647a-f834-49d7-a196-7c5b24d567bc None None]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ovs-vsctl', '--timeout=10', 'get', 'Interface', 'patch-int', 'ofport']
Exit code: 0
Stdout: '-1\n'
Stderr: '' from (pid=37026) execute /opt/stack/neutron/neutron/agent/linux/utils.py:81
2014-10-09 14:41:38.275 ERROR neutron.plugins.openvswitch.agent.ovs_neutron_agent [req-266e647a-f834-49d7-a196-7c5b24d567bc None None] Failed to create OVS patch port. Cannot have tunneling enabled on this agent, since this version of OVS does not support tunnels or patch ports. Agent terminated!
q-agt failed to start