root@controller:~# sudo -u neutron /usr/bin/neutron-server --config-file /etc/neutron/neutron.conf /var/log/neutron/server.log --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --debug
Traceback (most recent call last):
  File "/usr/bin/neutron-server", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/dist-packages/neutron/server/__init__.py", line 40, in main
    config.parse(sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/neutron/common/config.py", line 134, in parse
    version='%%prog %s' % neutron_version.release_string())
  File "/usr/lib/python2.7/dist-packages/oslo/config/cfg.py", line 1632, in __call__
    else sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/oslo/config/cfg.py", line 2133, in _parse_cli_opts
    return self._parse_config_files()
  File "/usr/lib/python2.7/dist-packages/oslo/config/cfg.py", line 2148, in _parse_config_files
    return self._oparser.parse_args(self._args, namespace)
  File "/usr/lib/python2.7/dist-packages/oslo/config/cfg.py", line 1496, in parse_args
    return super(_CachedArgumentParser, self).parse_args(args, namespace)
  File "/usr/lib/python2.7/argparse.py", line 1690, in parse_args
    args, argv = self.parse_known_args(args, namespace)
  File "/usr/lib/python2.7/argparse.py", line 1722, in parse_known_args
    namespace, args = self._parse_known_args(args, namespace)
  File "/usr/lib/python2.7/argparse.py", line 1928, in _parse_known_args
    start_index = consume_optional(start_index)
  File "/usr/lib/python2.7/argparse.py", line 1868, in consume_optional
    take_action(action, args, option_string)
  File "/usr/lib/python2.7/argparse.py", line 1796, in take_action
    action(self, namespace, argument_values, option_string)
  File "/usr/lib/python2.7/dist-packages/oslo/config/cfg.py", line 1062, in __call__
    ConfigParser._parse_file(values, namespace)
  File "/usr/lib/python2.7/dist-packages/oslo/config/cfg.py", line 1252, in _parse_file
    raise ConfigFileParseError(pe.filename, str(pe))
oslo.config.cfg.ConfigFileParseError: Failed to parse /etc/neutron/plugins/ml2/ml2_conf.ini: at /etc/neutron/plugins/ml2/ml2_conf.ini:66, No ':' or '=' found in assignment: 'neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver'