+/** \brief Create a point-to-point (p2p) Ethernet sub-interface
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param parent_if_index - index of the parent interface
+ @param subif_id - subinterface index identifier
+ @param remote_mac - client MAC address
+ @retval VNET_API_ERROR_INVALID_SW_IF_INDEX on invalid parent_if_index
+ @retval VNET_API_ERROR_INVALID_SW_IF_INDEX_2 on invalid subif_id
+ @retval VNET_API_ERROR_BOND_SLAVE_NOT_ALLOWED
+ @retval VNET_API_ERROR_SUBIF_ALREADY_EXISTS
+ @retval VNET_API_ERROR_SUBIF_CREATE_FAILED
+*/