Experimental Internet Stream Protocol: Version 2 (ST-II)
RFC 1190

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Network Working Group                                  CIP Working Group
Request for Comments: 1190                           C. Topolcic, Editor
Obsoletes: IEN-119                                          October 1990

        Experimental Internet Stream Protocol, Version 2 (ST-II)

Status of this Memo

   This memo defines a revised version of the Internet Stream Protocol,
   originally defined in IEN-119 [8], based on results from experiments
   with the original version, and subsequent requests, discussion, and
   suggestions for improvements.  This is a Limited-Use Experimental
   Protocol.  Please refer to the current edition of the "IAB Official
   Protocol Standards" for the standardization state and status of this
   protocol.  Distribution of this memo is unlimited.

1.         Abstract

   This memo defines the Internet Stream Protocol, Version 2 (ST-II), an
   IP-layer protocol that provides end-to-end guaranteed service across
   an internet.  This specification obsoletes IEN 119 "ST - A Proposed
   Internet Stream Protocol" written by Jim Forgie in 1979, the previous
   specification of ST.  ST-II is not compatible with Version 1 of the
   protocol, but maintains much of the architecture and philosophy of
   that version.  It is intended to fill in some of the areas left
   unaddressed, to make it easier to implement, and to support a wider
   range of applications.

CIP Working Group                                               [Page 1]
RFC 1190                Internet Stream Protocol            October 1990

   1.1.       Table of Contents

                 Status of this Memo .  .  .  .  .  .  .  .  .  .  .  .   1
         1.      Abstract   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .   1
         1.1.       Table of Contents   .  .  .  .  .  .  .  .  .  .  .   2
         1.2.       List of Figures  .  .  .  .  .  .  .  .  .  .  .  .   4

         2.      Introduction  .  .  .  .  .  .  .  .  .  .  .  .  .  .   7
         2.1.       Major Differences Between ST and ST-II   .  .  .  .   8
         2.2.       Concepts and Terminology  .  .  .  .  .  .  .  .  .   9
         2.3.       Relationship Between Applications and ST .  .  .  .  11
         2.4.       ST Control Message Protocol  .  .  .  .  .  .  .  .  12
         2.5.       Flow Specifications .  .  .  .  .  .  .  .  .  .  .  14

         3.      ST Control Message Protocol Functional Description   .  17
         3.1.       Stream Setup  .  .  .  .  .  .  .  .  .  .  .  .  .  18
         3.1.1.        Initial Setup at the Origin  .  .  .  .  .  .  .  18
         3.1.2.        Invoking the Routing Function   .  .  .  .  .  .  19
         3.1.3.        Reserving Resources .  .  .  .  .  .  .  .  .  .  19
         3.1.4.        Sending CONNECT Messages  .  .  .  .  .  .  .  .  20
         3.1.5.        CONNECT Processing by an Intermediate Agent .  .  22
         3.1.6.        Setup at the Targets   .  .  .  .  .  .  .  .  .  23
         3.1.7.        ACCEPT Processing by an Intermediate Agent  .  .  24
         3.1.8.        ACCEPT Processing by the Origin .  .  .  .  .  .  26
         3.1.9.        Processing a REFUSE Message  .  .  .  .  .  .  .  27
         3.2.       Data Transfer .  .  .  .  .  .  .  .  .  .  .  .  .  30
         3.3.       Modifying an Existing Stream .  .  .  .  .  .  .  .  31
         3.3.1.        Adding a Target  .  .  .  .  .  .  .  .  .  .  .  31
         3.3.2.        The Origin Removing a Target .  .  .  .  .  .  .  33
         3.3.3.        A Target Deleting Itself  .  .  .  .  .  .  .  .  35
         3.3.4.        Changing the FlowSpec  .  .  .  .  .  .  .  .  .  36
         3.4.       Stream Tear Down .  .  .  .  .  .  .  .  .  .  .  .  36
         3.5.       Exceptional Cases   .  .  .  .  .  .  .  .  .  .  .  37
         3.5.1.        Setup Failure due to CONNECT Timeout  .  .  .  .  37
         3.5.2.        Problems due to Routing Inconsistency .  .  .  .  38
         3.5.3.        Setup Failure due to a Routing Failure   .  .  .  39
         3.5.4.        Problems in Reserving Resources .  .  .  .  .  .  41
         3.5.5.        Setup Failure due to ACCEPT Timeout   .  .  .  .  41
         3.5.6.        Problems Caused by CHANGE Messages .  .  .  .  .  42
         3.5.7.        Notification of Changes Forced by Failures  .  .  42
         3.6.       Options .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  44
         3.6.1.        HID Field Option .  .  .  .  .  .  .  .  .  .  .  44
         3.6.2.        PTP Option .  .  .  .  .  .  .  .  .  .  .  .  .  44
         3.6.3.        FDx Option .  .  .  .  .  .  .  .  .  .  .  .  .  45
         3.6.4.        NoRecovery Option   .  .  .  .  .  .  .  .  .  .  46
         3.6.5.        RevChrg Option   .  .  .  .  .  .  .  .  .  .  .  46
         3.6.6.        Source Route Option .  .  .  .  .  .  .  .  .  .  46
         3.7.       Ancillary Functions .  .  .  .  .  .  .  .  .  .  .  48
         3.7.1.        Failure Detection   .  .  .  .  .  .  .  .  .  .  48