NetworkConnectionSection net = vm.getNetworkConnectionSection();
      Builder builder = net.toBuilder();
      builder.connections(Iterables.transform(net.getConnections(),
               new Function<NetworkConnection, NetworkConnection>() {

                  @Override
                  public NetworkConnection apply(NetworkConnection arg0) {
                     return arg0.toBuilder().connected(true).ipAddressAllocationMode(ipAddressAllocationMode).build();
                  }

               }));
      return client.getVmClient().updateNetworkConnectionOfVm(builder.build(), vm.getHref());