@Override
  public void shutdown(final NetworkProfile profile, final NetworkOffering offering) {
    final NetworkVO networkObject = networkDao.findById(profile.getId());
    if (networkObject.getBroadcastDomainType() != BroadcastDomainType.Lswitch
        || networkObject.getBroadcastUri() == null) {
      s_logger.warn(
          "BroadcastUri is empty or incorrect for guestnetwork " + networkObject.getDisplayText());
      return;
    }

    final List<NiciraNvpDeviceVO> devices =
        niciraNvpDao.listByPhysicalNetwork(networkObject.getPhysicalNetworkId());
    if (devices.isEmpty()) {
      s_logger.error(
          "No NiciraNvp Controller on physical network " + networkObject.getPhysicalNetworkId());
      return;
    }
    final NiciraNvpDeviceVO niciraNvpDevice = devices.get(0);
    final HostVO niciraNvpHost = hostDao.findById(niciraNvpDevice.getHostId());

    final DeleteLogicalSwitchCommand cmd =
        new DeleteLogicalSwitchCommand(
            BroadcastDomainType.getValue(networkObject.getBroadcastUri()));
    final DeleteLogicalSwitchAnswer answer =
        (DeleteLogicalSwitchAnswer) agentMgr.easySend(niciraNvpHost.getId(), cmd);

    if (answer == null || !answer.getResult()) {
      s_logger.error("DeleteLogicalSwitchCommand failed");
    }

    super.shutdown(profile, offering);
  }
  private boolean preparePxeInBasicZone(
      VirtualMachineProfile profile,
      NicProfile nic,
      DeployDestination dest,
      ReservationContext context)
      throws AgentUnavailableException, OperationTimedoutException {
    NetworkVO nwVO = _nwDao.findById(nic.getNetworkId());
    QueryBuilder<BaremetalPxeVO> sc = QueryBuilder.create(BaremetalPxeVO.class);
    sc.and(sc.entity().getDeviceType(), Op.EQ, BaremetalPxeType.KICK_START.toString());
    sc.and(sc.entity().getPhysicalNetworkId(), Op.EQ, nwVO.getPhysicalNetworkId());
    BaremetalPxeVO pxeVo = sc.find();
    if (pxeVo == null) {
      throw new CloudRuntimeException(
          "No kickstart PXE server found in pod: "
              + dest.getPod().getId()
              + ", you need to add it before starting VM");
    }
    VMTemplateVO template = _tmpDao.findById(profile.getTemplateId());
    List<String> tuple = parseKickstartUrl(profile);

    String ks = tuple.get(0);
    String kernel = tuple.get(1);
    String initrd = tuple.get(2);

    PrepareKickstartPxeServerCommand cmd = new PrepareKickstartPxeServerCommand();
    cmd.setKsFile(ks);
    cmd.setInitrd(initrd);
    cmd.setKernel(kernel);
    cmd.setMac(nic.getMacAddress());
    cmd.setTemplateUuid(template.getUuid());
    Answer aws = _agentMgr.send(pxeVo.getHostId(), cmd);
    if (!aws.getResult()) {
      s_logger.warn(
          "Unable to set host: "
              + dest.getHost().getId()
              + " to PXE boot because "
              + aws.getDetails());
      return false;
    }

    return true;
  }