int vnet_create_loopback_interface (u32 * sw_if_indexp, u8 * mac_address);
int vnet_delete_loopback_interface (u32 sw_if_index);
+int vnet_delete_sub_interface (u32 sw_if_index);
// Perform ethernet subinterface classification table lookups given
// the ports's sw_if_index and fields extracted from the ethernet header.