old_contents: """
  Copyright (c) 2017 SONATA-NFV and Paderborn University
  ALL RIGHTS RESERVED.
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  
  Neither the name of the SONATA-NFV, Paderborn University
  nor the names of its contributors may be used to endorse or promote
  products derived from this software without specific prior written
  permission.
  
  This work has been performed in the framework of the SONATA project,
  funded by the European Commission under Grant number 671517 through
  the Horizon 2020 and 5G-PPP programmes. The authors would like to
  acknowledge the contributions of their colleagues of the SONATA
  partner consortium (www.sonata-nfv.eu).
  """
  import logging
  from mininet.log import setLogLevel
  from emuvim.dcemulator.net import DCNetwork
  from emuvim.api.rest.rest_api_endpoint import RestApiEndpoint
  from emuvim.api.openstack.openstack_api_endpoint import OpenstackApiEndpoint
  
  logging.basicConfig(level=logging.INFO)
  setLogLevel('info')  # set Mininet loglevel
  logging.getLogger('werkzeug').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.base').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.compute').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.keystone').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.nova').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.neutron').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.heat').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.heat.parser').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.glance').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.helper').setLevel(logging.DEBUG)
  
  
  def create_topology():
      net = DCNetwork(monitor=False, enable_learning=False)
  
      dc1 = net.addDatacenter("dc1")
      # add OpenStack-like APIs to the emulated DC
      api1 = OpenstackApiEndpoint("0.0.0.0", 6001)
      api1.connect_datacenter(dc1)
      api1.start()
      api1.connect_dc_network(net)
      # add the command line interface endpoint to the emulated DC (REST API)
      rapi1 = RestApiEndpoint("0.0.0.0", 5001)
      rapi1.connectDCNetwork(net)
      rapi1.connectDatacenter(dc1)
      rapi1.start()
  
      net.start()
      net.CLI()
      # when the user types exit in the CLI, we stop the emulator
      net.stop()
  
  
  def main():
      create_topology()
  
  
  if __name__ == '__main__':
      main()
  
new_contents: """
  Copyright (c) 2017 SONATA-NFV and Paderborn University
  ALL RIGHTS RESERVED.
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  
  Neither the name of the SONATA-NFV, Paderborn University
  nor the names of its contributors may be used to endorse or promote
  products derived from this software without specific prior written
  permission.
  
  This work has been performed in the framework of the SONATA project,
  funded by the European Commission under Grant number 671517 through
  the Horizon 2020 and 5G-PPP programmes. The authors would like to
  acknowledge the contributions of their colleagues of the SONATA
  partner consortium (www.sonata-nfv.eu).
  """
  import logging
  from mininet.log import setLogLevel
  from emuvim.dcemulator.net import DCNetwork
  from emuvim.api.rest.rest_api_endpoint import RestApiEndpoint
  from emuvim.api.openstack.openstack_api_endpoint import OpenstackApiEndpoint
  
  logging.basicConfig(level=logging.INFO)
  setLogLevel('info')  # set Mininet loglevel
  logging.getLogger('werkzeug').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.base').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.compute').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.keystone').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.nova').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.neutron').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.heat').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.heat.parser').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.glance').setLevel(logging.DEBUG)
  logging.getLogger('api.openstack.helper').setLevel(logging.DEBUG)
  
  
  def create_topology():
      net = DCNetwork(monitor=False, enable_learning=True)
  
      dc1 = net.addDatacenter("dc1")
      # add OpenStack-like APIs to the emulated DC
      api1 = OpenstackApiEndpoint("0.0.0.0", 6001)
      api1.connect_datacenter(dc1)
      api1.start()
      api1.connect_dc_network(net)
      # add the command line interface endpoint to the emulated DC (REST API)
      rapi1 = RestApiEndpoint("0.0.0.0", 5001)
      rapi1.connectDCNetwork(net)
      rapi1.connectDatacenter(dc1)
      rapi1.start()
  
      net.start()
      net.CLI()
      # when the user types exit in the CLI, we stop the emulator
      net.stop()
  
  
  def main():
      create_topology()
  
  
  if __name__ == '__main__':
      main()
  
subject: Enable learning switch mode in default topo.