def get_add_vswitch_port_group_spec(client_factory, vswitch_name,
    port_group_name, vlan_id):
    """Builds the virtual switch port group add spec."""
    vswitch_port_group_spec = client_factory.create('ns0:HostPortGroupSpec')
    vswitch_port_group_spec.name = port_group_name
    vswitch_port_group_spec.vswitchName = vswitch_name
    vswitch_port_group_spec.vlanId = int(vlan_id)
    policy = client_factory.create('ns0:HostNetworkPolicy')
    nicteaming = client_factory.create('ns0:HostNicTeamingPolicy')
    nicteaming.notifySwitches = True
    policy.nicTeaming = nicteaming
    vswitch_port_group_spec.policy = policy
    return vswitch_port_group_spec
