Forwarding Layer Problem Statement
draft-bryant-arch-fwd-layer-ps-01

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INTAREA Working Group                                          S. Bryant
Internet-Draft                                               U. Chunduri
Intended status: Informational                                 T. Eckert
Expires: January 14, 2021                                       A. Clemm
                                             Futurewei Technologies Inc.
                                                           July 13, 2020

                   Forwarding Layer Problem Statement
                   draft-bryant-arch-fwd-layer-ps-01

Abstract

   This document considers the problems that need to addressed in IP in
   order to address the use cases and new network services described in
   draft-bryant-arch-fwd-layer-uc-00.

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   This Internet-Draft will expire on January 14, 2021.

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Bryant, et al.          Expires January 14, 2021                [Page 1]
Internet-Draft                   FWD PS                        July 2020

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Forwarding Layer  . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Underlying New Requirements . . . . . . . . . . . . . . . . .   4
     3.1.  Better than Best Effort . . . . . . . . . . . . . . . . .   4
     3.2.  Efficient Packet Design . . . . . . . . . . . . . . . . .   5
     3.3.  Forwarding Identifiers  . . . . . . . . . . . . . . . . .   6
     3.4.  Operational visibility  . . . . . . . . . . . . . . . . .   6
     3.5.  Holistic Solution . . . . . . . . . . . . . . . . . . . .   7
   4.  Existing Protocol, Layering Challenges and Gaps . . . . . . .   7
     4.1.  Challenges with IPv6  . . . . . . . . . . . . . . . . . .   8
       4.1.1.  The End-to-End Model  . . . . . . . . . . . . . . . .   8
       4.1.2.  Fixed Address Length  . . . . . . . . . . . . . . . .  11
     4.2.  Better Than Best Effort E2E Network Services  . . . . . .  13
     4.3.  Adaptive Bit-rate Video streaming . . . . . . . . . . . .  14
     4.4.  Limited Domain Opportunities  . . . . . . . . . . . . . .  15
     4.5.  DetNet and Higher Precision Networking Service  . . . . .  15
     4.6.  Forwarding Plane vs. Control Plane  . . . . . . . . . . .  16
     4.7.  User-Network/Network-User Interface Signaling . . . . . .  17
   5.  Candidate Solution Directions . . . . . . . . . . . . . . . .  18
     5.1.  Variable Length Addresses . . . . . . . . . . . . . . . .  18
     5.2.  Address Semantics . . . . . . . . . . . . . . . . . . . .  19
     5.3.  Multiple Instructions . . . . . . . . . . . . . . . . . .  19
     5.4.  Node and Path Specific Processing Instructions  . . . . .  19
     5.5.  Integrated Assurance and Verification . . . . . . . . . .  20
     5.6.  For Consideration in a Future Version . . . . . . . . . .  20
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  21
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  21
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  21
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  26

1.  Introduction

   There is an emerging set of new requirements that exceed the network
   and transport services of the current Internet, which only delivers
   "best effort" service.  While many controlled or private networks
   include further services, such as other DiffServ QoS in addition to
   best effort and traffic engineering with bandwidth guarantees, the
   solutions used today only support walled gardens and are thus not
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