Experiments with the Tenet Real-Time Protocol Suite
           on the Sequoia 2000 Wide Area Network


                      Anindo Banerjea,
                    Edward W. Knightly,
                      Fred L. Templin,
                       and Hui Zhang


                        Tenet Group
           Computer Science Division, UC Berkeley
                            and
         International Computer Science Institute,
                1947 Center St. , Suite 600
                  Berkeley, CA 94704-1105.
           Tel: (510)-642-8919 Fax:(510)-643-7684
            E-mail: banerjea@tenet.berkeley.edu


                          ABSTRACT


Emerging distributed multimedia applications have  stringent
performance  requirements  in  terms  of  bandwidth,  delay,
delay-jitter, and loss rate.  The Tenet  real-time  protocol
suite  provides  the  services and mechanisms for delivering
such performance guarantees, even  during  periods  of  high
network  load  and congestion. The protocols achieve this by
using resource management, connection admission control, and
appropriate  packet  service disciplines inside the network.
The Sequoia 2000 network employs the Tenet Protocol Suite at
each  of  its  hosts  and routers making it one of the first
wide area packet-switched  networks  to  provide  end-to-end
per-connection  performance guarantees.  This paper presents
experiments of the Tenet protocols on the Sequoia 2000  net-
work including measurements of the performance of the proto-
cols, the service received by real  multimedia  applications
using  the  protocols,  and  comparisons  with  the  service
received by applications that  use  the  Internet  protocols
(UDP/IP).  We conclude that the Tenet protocols successfully
protect the real-time channels from  other  traffic  in  the
network, including other real-time channels, and continue to
meet the performance guarantees, even when  the  network  is
highly loaded.