'Add VLAN interface to VM\'s namespace.
:param mac_address: MAC address to be set on VLAN interface.
:param ip_address: The IPNetwork instance containing IP address
assigned to the interface.
:param segmentation_id: VLAN tag added to the interface.'

def add_vlan_interface(self, mac_address, ip_address, segmentation_id):

    net_helpers.create_vlan_interface(self.namespace, self.port.name, mac_address, ip_address, segmentation_id)
