RFC 3158 (rfc3158) - Page 2 of 22

RTP Testing Strategies

RFC 3158                 RTP Testing Strategies              August 2001


   6 SSRC Randomization. . . . . . . . . . . . . . . . . . . 19
   7 Security Considerations . . . . . . . . . . . . . . . . 20
   8 Authors' Addresses. . . . . . . . . . . . . . . . . . . 20
   9 References. . . . . . . . . . . . . . . . . . . . . . . 21
   Full Copyright Statement. . . . . . . . . . . . . . . . . 22

1 Introduction

   This memo describes a possible testing strategy for RTP [1]
   implementations.  The tests are intended to help demonstrate
   interoperability of multiple implementations, and to illustrate
   common implementation errors.  They are not intended to be an
   exhaustive set of tests and passing these tests does not necessarily
   imply conformance to the complete RTP specification.

2 End systems

   The architecture for testing RTP end systems is shown in Figure 1.

                             +-----------------+
                    +--------+ Test instrument +-----+
                    |        +-----------------+     |
                    |                                |
            +-------+--------+               +-------+--------+
            |     First RTP  |               |   Second RTP   |
            | implementation |               | implementation |
            +----------------+               +----------------+

                     Figure 1:  Testing architecture

   Both RTP implementations send packets to the test instrument, which
   forwards packets from one implementation to the other.  Unless
   otherwise specified, packets are forwarded with no additional delay
   and without loss.  The test instrument is required to delay or
   discard packets in some of the tests.  The test instrument is
   invisible to the RTP implementations - it merely simulates poor
   network conditions.

   The test instrument is also capable of logging packet contents for
   inspection of their correctness.

   A typical test setup might comprise three machines on a single
   Ethernet segment.  Two of these machines run the RTP implementations,
   the third runs the test instrument.  The test instrument is an
   application level packet forwarder.  Both RTP implementations are
   instructed to send unicast RTP packets to the test instrument, which
   forwards packets between them.




Perkins, et al.              Informational