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The VNI value is 24bits, i.e. <1 – 16777215>

When I defined the max value in the ml2_conf.ini file:
[ml2_type_vxlan]
vni_ranges = 1001:16777215

Neutron service fails to start.

2015-02-28 17:11:33.793 CRITICAL neutron [-] MemoryError

2015-02-28 17:11:33.793 TRACE neutron Traceback (most recent call last):
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/bin/neutron-server", line 9, in <module>
2015-02-28 17:11:33.793 TRACE neutron     load_entry_point('neutron==2014.2.2.dev438', 'console_scripts', 'neutron-server')()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/server/__init__.py", line 48, in main
2015-02-28 17:11:33.793 TRACE neutron     neutron_api = service.serve_wsgi(service.NeutronApiService)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/service.py", line 105, in serve_wsgi
2015-02-28 17:11:33.793 TRACE neutron     LOG.exception(_('Unrecoverable error: please check log '
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/openstack/common/excutils.py", line 82, in __exit__
2015-02-28 17:11:33.793 TRACE neutron     six.reraise(self.type_, self.value, self.tb)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/service.py", line 102, in serve_wsgi
2015-02-28 17:11:33.793 TRACE neutron     service.start()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/service.py", line 73, in start
2015-02-28 17:11:33.793 TRACE neutron     self.wsgi_app = _run_wsgi(self.app_name)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/service.py", line 168, in _run_wsgi
2015-02-28 17:11:33.793 TRACE neutron     app = config.load_paste_app(app_name)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/common/config.py", line 185, in load_paste_app
2015-02-28 17:11:33.793 TRACE neutron     app = deploy.loadapp("config:%s" % config_path, name=app_name)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 247, in loadapp
2015-02-28 17:11:33.793 TRACE neutron     return loadobj(APP, uri, name=name, **kw)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 272, in loadobj
2015-02-28 17:11:33.793 TRACE neutron     return context.create()
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 710, in create
2015-02-28 17:11:33.793 TRACE neutron     return self.object_type.invoke(self)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 144, in invoke
2015-02-28 17:11:33.793 TRACE neutron     **context.local_conf)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/util.py", line 55, in fix_call
2015-02-28 17:11:33.793 TRACE neutron     val = callable(*args, **kw)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/urlmap.py", line 25, in urlmap_factory
2015-02-28 17:11:33.793 TRACE neutron     app = loader.get_app(app_name, global_conf=global_conf)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 350, in get_app
2015-02-28 17:11:33.793 TRACE neutron     name=name, global_conf=global_conf).create()
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 710, in create
2015-02-28 17:11:33.793 TRACE neutron     return self.object_type.invoke(self)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 144, in invoke
2015-02-28 17:11:33.793 TRACE neutron     **context.local_conf)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/util.py", line 55, in fix_call
2015-02-28 17:11:33.793 TRACE neutron     val = callable(*args, **kw)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/auth.py", line 71, in pipeline_factory
2015-02-28 17:11:33.793 TRACE neutron     app = loader.get_app(pipeline[-1])
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 350, in get_app
2015-02-28 17:11:33.793 TRACE neutron     name=name, global_conf=global_conf).create()
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 710, in create
2015-02-28 17:11:33.793 TRACE neutron     return self.object_type.invoke(self)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 146, in invoke
2015-02-28 17:11:33.793 TRACE neutron     return fix_call(context.object, context.global_conf, **context.local_conf)
2015-02-28 17:11:33.793 TRACE neutron   File "/usr/local/lib/python2.7/dist-packages/paste/deploy/util.py", line 55, in fix_call
2015-02-28 17:11:33.793 TRACE neutron     val = callable(*args, **kw)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/api/v2/router.py", line 69, in factory
2015-02-28 17:11:33.793 TRACE neutron     return cls(**local_config)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/api/v2/router.py", line 73, in __init__
2015-02-28 17:11:33.793 TRACE neutron     plugin = manager.NeutronManager.get_plugin()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/manager.py", line 219, in get_plugin
2015-02-28 17:11:33.793 TRACE neutron     return weakref.proxy(cls.get_instance().plugin)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/manager.py", line 213, in get_instance
2015-02-28 17:11:33.793 TRACE neutron     cls._create_instance()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/openstack/common/lockutils.py", line 272, in inner
2015-02-28 17:11:33.793 TRACE neutron     return f(*args, **kwargs)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/manager.py", line 199, in _create_instance
2015-02-28 17:11:33.793 TRACE neutron     cls._instance = cls()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/manager.py", line 114, in __init__
2015-02-28 17:11:33.793 TRACE neutron     plugin_provider)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/manager.py", line 140, in _get_plugin_instance
2015-02-28 17:11:33.793 TRACE neutron     return plugin_class()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/plugins/ml2/plugin.py", line 126, in __init__
2015-02-28 17:11:33.793 TRACE neutron     self.type_manager.initialize()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/plugins/ml2/managers.py", line 152, in initialize
2015-02-28 17:11:33.793 TRACE neutron     driver.obj.initialize()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/type_vxlan.py", line 80, in initialize
2015-02-28 17:11:33.793 TRACE neutron     self._initialize(cfg.CONF.ml2_type_vxlan.vni_ranges)
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/type_tunnel.py", line 65, in _initialize
2015-02-28 17:11:33.793 TRACE neutron     self.sync_allocations()
2015-02-28 17:11:33.793 TRACE neutron   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/type_vxlan.py", line 96, in sync_allocations
2015-02-28 17:11:33.793 TRACE neutron     vxlan_vnis |= set(moves.xrange(tun_min, tun_max + 1))
2015-02-28 17:11:33.793 TRACE neutron MemoryError
2015-02-28 17:11:33.793 TRACE neutron

** Affects: neutron
     Importance: Undecided
         Status: New

-- 
Can't start Neutron service when max VNI value is defined in ml2_conf.ini file
https://bugs.launchpad.net/bugs/1426904
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