'Specific method to attach an interface to a node
:param      node: Node which should be used
:type       node: :class:`Node`
:param      iface: Network interface which should be used
:type       iface: :class:`GandiNetworkInterface`
:rtype: ``bool``'

def ex_node_attach_interface(self, node, iface):

    op = self.connection.request('hosting.vm.iface_attach', int(node.id), int(iface.id))
    if self._wait_operation(op.object['id']):
        return True
    return False
