RFC 3644 (rfc3644) - Page 2 of 73

Policy Quality of Service (QoS) Information Model

RFC 3644              Policy QoS Information Model         November 2003


Table of Contents

   1.   Introduction. . . . . . . . . . . . . . . . . . . . . . . . .  5
        1.1.  The Process of QoS Policy Definition. . . . . . . . . .  5
        1.2.  Design Goals and Their Ramifications. . . . . . . . . .  8
              1.2.1.  Policy-Definition Oriented. . . . . . . . . . .  8
                      1.2.1.1.  Rule-based Modeling . . . . . . . . .  9
                      1.2.1.2.  Organize Information Hierarchically .  9
                      1.2.1.3.  Goal-Oriented Policy Definition . . . 10
              1.2.2. Policy Domain Model. . . . . . . . . . . . . . . 11
                      1.2.2.1.  Model QoS Policy in a Device- and
                                Vendor-Independent Manner . . . . . . 11
                      1.2.2.2.  Use Roles for Mapping Policy to
                                Network Devices . . . . . . . . . . . 11
                      1.2.2.3.  Reusability . . . . . . . . . . . . . 12
              1.2.3.  Enforceable Policy. . . . . . . . . . . . . . . 12
              1.2.4.  QPIM Covers Both Signaled And Provisioned QoS . 14
              1.2.5.  Interoperability for PDPs and Management
                      Applications. . . . . . . . . . . . . . . . . . 14
        1.3.  Modeling Abstract QoS Policies. . . . . . . . . . . . . 15
        1.4.  Rule Hierarchy. . . . . . . . . . . . . . . . . . . . . 17
              1.4.1.  Use of Hierarchy Within Bandwidth Allocation
                      Policies. . . . . . . . . . . . . . . . . . . . 17
              1.4.2.  Use of Rule Hierarchy to Describe Drop
                      Threshold Policies. . . . . . . . . . . . . . . 21
              1.4.3.  Restrictions of the Use of Hierarchy Within
                      QPIM. . . . . . . . . . . . . . . . . . . . . . 22
        1.5.  Intended Audiences. . . . . . . . . . . . . . . . . . . 23
   2.   Class Hierarchies . . . . . . . . . . . . . . . . . . . . . . 23
        2.1.  Inheritance Hierarchy . . . . . . . . . . . . . . . . . 23
        2.2.  Relationship Hierarchy. . . . . . . . . . . . . . . . . 26
   3.   QoS Actions . . . . . . . . . . . . . . . . . . . . . . . . . 26
        3.1.  Overview. . . . . . . . . . . . . . . . . . . . . . . . 26
        3.2.  RSVP Policy Actions . . . . . . . . . . . . . . . . . . 27
              3.2.1.  Example: Controlling COPS Stateless Decision. . 28
              3.2.2.  Example: Controlling the COPS Replace Decision. 29
        3.3.  Provisioning Policy Actions . . . . . . . . . . . . . . 29
              3.3.1.  Admission Actions: Controlling Policers and
                      Shapers . . . . . . . . . . . . . . . . . . . . 29
              3.3.2.  Controlling Markers . . . . . . . . . . . . . . 32
              3.3.3.  Controlling Edge Policies - Examples. . . . . . 33
        3.4.  Per-Hop Behavior Actions. . . . . . . . . . . . . . . . 34
              3.4.1.  Controlling Bandwidth and Delay . . . . . . . . 35
              3.4.2.  Congestion Control Actions. . . . . . . . . . . 35
              3.4.3.  Using Hierarchical Policies: Examples for PHB
                      Actions . . . . . . . . . . . . . . . . . . . . 36
   4.   Traffic Profiles. . . . . . . . . . . . . . . . . . . . . . . 38
        4.1.  Provisioning Traffic Profiles . . . . . . . . . . . . . 38



Snir, et al.                Standards Track