root@corp-openstack01:/etc/neutron# neutron ext-list --debug
DEBUG: keystoneclient.session REQ: curl -g -i -X GET http://corp-openstack01:35357/v3 -H "Accept: application/json" -H "User-Agent: python-keystoneclient"
DEBUG: keystoneclient.session RESP: [200] content-length: 256 vary: X-Auth-Token keep-alive: timeout=5, max=100 server: Apache/2.4.7 (Ubuntu) connection: Keep-Alive date: Mon, 27 Jul 2015 21:01:06 GMT x-openstack-request-id: req-fb59bbf5-d8f7-4784-81a3-0bd92e9ded4e content-type: application/json x-distribution: Ubuntu
RESP BODY: {"version": {"status": "stable", "updated": "2015-03-30T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd.openstack.identity-v3+json"}], "id": "v3.4", "links": [{"href": "http://corp-openstack01:35357/v3/", "rel": "self"}]}}

DEBUG: stevedore.extension found extension EntryPoint.parse('table = cliff.formatters.table:TableFormatter')
DEBUG: stevedore.extension found extension EntryPoint.parse('csv = cliff.formatters.commaseparated:CSVLister')
DEBUG: stevedore.extension found extension EntryPoint.parse('yaml = clifftablib.formatters:YamlFormatter')
DEBUG: stevedore.extension found extension EntryPoint.parse('json = clifftablib.formatters:JsonFormatter')
DEBUG: stevedore.extension found extension EntryPoint.parse('html = clifftablib.formatters:HtmlFormatter')
DEBUG: neutronclient.neutron.v2_0.extension.ListExt get_data(Namespace(columns=[], fields=[], formatter='table', max_width=0, quote_mode='nonnumeric', request_format='json', show_details=False))
DEBUG: keystoneclient.auth.identity.v3 Making authentication request to http://corp-openstack01:35357/v3/auth/tokens
DEBUG: keystoneclient.session REQ: curl -g -i -X GET http://corp-openstack01:9696/v2.0/extensions.json -H "User-Agent: python-neutronclient" -H "Accept: application/json" -H "X-Auth-Token: {SHA1}395dc98267349dd164c3ec83b2ab813ee6bc245c"
DEBUG: keystoneclient.session RESP:
DEBUG: keystoneclient.auth.identity.v3 Making authentication request to http://corp-openstack01:35357/v3/auth/tokens
DEBUG: keystoneclient.session RESP:
DEBUG: neutronclient.v2_0.client Error message: Authentication required
ERROR: neutronclient.shell Authentication required
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/neutronclient/shell.py", line 731, in run_subcommand
    return run_command(cmd, cmd_parser, sub_argv)
  File "/usr/lib/python2.7/dist-packages/neutronclient/shell.py", line 97, in run_command
    return cmd.run(known_args)
  File "/usr/lib/python2.7/dist-packages/neutronclient/common/command.py", line 29, in run
    return super(OpenStackCommand, self).run(parsed_args)
  File "/usr/lib/python2.7/dist-packages/cliff/display.py", line 91, in run
    column_names, data = self.take_action(parsed_args)
  File "/usr/lib/python2.7/dist-packages/neutronclient/common/command.py", line 35, in take_action
    return self.get_data(parsed_args)
  File "/usr/lib/python2.7/dist-packages/neutronclient/neutron/v2_0/__init__.py", line 687, in get_data
    data = self.retrieve_list(parsed_args)
  File "/usr/lib/python2.7/dist-packages/neutronclient/neutron/v2_0/__init__.py", line 650, in retrieve_list
    data = self.call_server(neutron_client, search_opts, parsed_args)
  File "/usr/lib/python2.7/dist-packages/neutronclient/neutron/v2_0/__init__.py", line 622, in call_server
    data = obj_lister(**search_opts)
  File "/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 99, in with_params
    ret = self.function(instance, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 485, in list_extensions
    return self.get(self.extensions_path, params=_params)
  File "/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 290, in get
    headers=headers, params=params)
  File "/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 267, in retry_request
    headers=headers, params=params)
  File "/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 208, in do_request
    self._handle_fault_response(status_code, replybody)
  File "/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 182, in _handle_fault_response
    exception_handler_v20(status_code, des_error_body)
  File "/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 80, in exception_handler_v20
    message=message)
NeutronClientException: Authentication required