An Inventory of Transport-centric Functions Provided by Middleboxes
draft-dolson-transport-middlebox-01

Document Type Active Internet-Draft (individual)
Last updated 2017-12-10 (latest revision 2017-12-07)
Replaces draft-dolson-plus-middlebox-benefits
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Internet Engineering Task Force                                D. Dolson
Internet-Draft                                                  Sandvine
Intended status: Informational                               J. Snellman
Expires: June 10, 2018
                                                            M. Boucadair
                                                            C. Jacquenet
                                                                  Orange
                                                        December 7, 2017

  An Inventory of Transport-centric Functions Provided by Middleboxes
                  draft-dolson-transport-middlebox-01

Abstract

   This document summarizes benefits that operators perceive to be
   provided by intermediary devices that provide functions apart from
   normal IP forwarding.  Such intermediary devices are often called
   "middleboxes".

   RFC3234 defines a taxonomy of middleboxes and issues in the Internet.
   Most of those middleboxes utilize or modify application-layer data.
   This document primarily focuses on devices that observe and act on
   information carried in the transport layer, and especially
   information carried in TCP packets.

   A primary goal of this document is to provide information to working
   groups developing new transport protocols, to aid understanding of
   what might be gained or lost by design decisions that may affect (or
   be affected by) middlebox operation.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   This Internet-Draft will expire on June 10, 2018.

Dolson, et al.            Expires June 10, 2018                 [Page 1]
Internet-Draft    Transport-centric Middlebox Functions    December 2017

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   document authors.  All rights reserved.

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Operator Perspective  . . . . . . . . . . . . . . . . . .   3
     1.2.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Requirements Language . . . . . . . . . . . . . . . . . .   5
   2.  Measurements  . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Packet Loss . . . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  Round Trip Times  . . . . . . . . . . . . . . . . . . . .   6
     2.3.  Measuring Packet Reordering . . . . . . . . . . . . . . .   7
     2.4.  Throughput and Bottleneck Identification  . . . . . . . .   7
     2.5.  Congestion Responsiveness . . . . . . . . . . . . . . . .   7
     2.6.  Attack Detection  . . . . . . . . . . . . . . . . . . . .   8
     2.7.  Packet Corruption . . . . . . . . . . . . . . . . . . . .   8
     2.8.  Application-Layer Measurements  . . . . . . . . . . . . .   9
   3.  Functions Beyond Measurement: A Few Examples  . . . . . . . .   9
     3.1.  NAT . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.2.  Firewall  . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.3.  DDoS Scrubbing  . . . . . . . . . . . . . . . . . . . . .  10
     3.4.  Implicit Identification . . . . . . . . . . . . . . . . .  11
     3.5.  Performance-Enhancing Proxies . . . . . . . . . . . . . .  11
     3.6.  Network Coding  . . . . . . . . . . . . . . . . . . . . .  12
     3.7.  Network-Assisted Bandwidth Aggregation  . . . . . . . . .  12
     3.8.  Prioritization and Differentiated Services  . . . . . . .  13
     3.9.  Measurement-Based Shaping . . . . . . . . . . . . . . . .  13
     3.10. Fairness to End-User Quota  . . . . . . . . . . . . . . .  14
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
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