VCD API call for Fence vApp operation

Hello,

I'm trying to make the API call as same as Fence vApp operation from VCD UI shown in attached image.

I've tried snippet code below but it's behavior not same as made on UI.

NetworkConfigSectionType networkConfigSectionType = vapp.getNetworkConfigSection();

networkConfigSectionType.getNetworkConfig().get(0).getConfiguration().setFenceMode(FenceModeValuesType.BRIDGED.value());

vapp.updateSection(networkConfigSectionType).waitForTask(0);

ps. My vApp directly connected to Org VDC Network.

Any idea?

Thank you.

Nont