# Pastebin L3Y68sS2
diff --git a/nova/conductor/tasks/live_migrate.py b/nova/conductor/tasks/live_migrate.py
 index a5b1ddfde9..772384566f 100644
 --- a/nova/conductor/tasks/live_migrate.py
 +++ b/nova/conductor/tasks/live_migrate.py
 @@ -19,6 +19,7 @@ from nova.conductor.tasks import base
  import nova.conf
  from nova import exception
  from nova.i18n import _
 +from nova.network.neutronv2 import api as neutronapi
  from nova import objects
  from nova.scheduler import utils as scheduler_utils
  from nova import utils
 @@ -224,6 +225,30 @@ class LiveMigrationTask(base.TaskBase):
                  reason=(_('Unable to determine in which cell '
                            'destination host %s lives.') % self.destination))
 
 +    def _get_segment_ids_for_vif(self, vif):
 +        segments = []
 +        neutron_api = neutronapi.get_client(self.context)
 +        results = neutron_api.show_port(vif)
 +        port = results.get('port')
 +        for fixed_ip in port.get('fixed_ips', []):
 +            subnet_id = fixed_ip.get('subnet_id')
 +            if subnet_id:
 +                results = neutron_api.show_subnet(subnet_id)
 +                segment = results.get('subnet', {}).get('segment_id')
 +                if segment:
 +                    segments.append(segment)
 +        return segments
 +
 +    def _check_routed_networks(self):
 +        segment_ids = []
 +        nw_info = self.instance.get_network_info()
 +        for vif in nw_info:
 +            seg_id = self._get_segment_ids_for_vif(vif['id'])
 +            if seg_id:
 +                segment_ids.extend(seg_id)
 +        if segment_ids:
 +            self.request_spec.scheduler_hints['routed_segments'] = segment_ids
 +
      def _find_destination(self):
          # TODO(johngarbutt) this retry loop should be shared
          attempted_hosts = [self.source]
 @@ -262,6 +287,7 @@ class LiveMigrationTask(base.TaskBase):
              request_spec.requested_destination = objects.Destination(
                  cell=cell_mapping)
 
 +        self._check_routed_networks()
          request_spec.ensure_project_id(self.instance)
          host = None
          while host is None: