1 | If a receiver starts sending Resv messages (4) before receiving any Path messages (3), RSVP will return error messages to the receiver. |
2 | The receiver may simply choose to ignore such error messages, or it may avoid them by waiting for Path messages before sending Resv messages. |
3 | A specific application program interface (API) for RSVP is not defined in its protocol spec since it may be host system dependent. |