Packet Loss Signaling for Encrypted Protocols
draft-ferrieuxhamchaoui-tsvwg-lossbits-02

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TSVWG                                                        A. Ferrieux
Internet-Draft                                              I. Hamchaoui
Intended status: Informational                               Orange Labs
Expires: May 6, 2020                                         I. Lubashev
                                                     Akamai Technologies
                                                        November 3, 2019

             Packet Loss Signaling for Encrypted Protocols
               draft-ferrieuxhamchaoui-tsvwg-lossbits-02

Abstract

   This document describes a protocol-independent method that employs
   two bits to allow endpoints to signal packet loss in a way that can
   be used by network devices to measure and locate the source of the
   loss.  The signaling method applies to all protocols with a protocol-
   specific way to identify packet loss.  The method is especially
   valuable when applied to protocols that encrypt transport header and
   do not allow an alternative method for loss detection.

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 6, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect

Ferrieux, et al.           Expires May 6, 2020                  [Page 1]
Internet-Draft                  loss-bits                  November 2019

   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Notational Conventions  . . . . . . . . . . . . . . . . . . .   3
   3.  Loss Bits . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Setting the sQuare Bit on Outgoing Packets  . . . . . . .   4
       3.1.1.  Q Period Selection  . . . . . . . . . . . . . . . . .   4
     3.2.  Setting the Loss Event Bit on Outgoing Packets  . . . . .   4
   4.  Using the Loss Bits for Passive Loss Measurement  . . . . . .   5
     4.1.  End-To-End Loss . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  Upstream Loss . . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  Correlating End-to-End and Upstream Loss  . . . . . . . .   6
     4.4.  Downstream Loss . . . . . . . . . . . . . . . . . . . . .   7
     4.5.  Observer Loss . . . . . . . . . . . . . . . . . . . . . .   7
   5.  ECN-Echo Event Bit  . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Setting the ECN-Echo Event Bit on Outgoing Packets  . . .   8
     5.2.  Using E Bit for Passive ECN-Reported Congestion
           Measurement . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Protocol Ossification Considerations  . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   9
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   10. Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     10.1.  Since version 01 . . . . . . . . . . . . . . . . . . . .   9
     10.2.  Since version 00 . . . . . . . . . . . . . . . . . . . .   9
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     12.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Packet loss is a pervasive problem of day-to-day network operation,
   and proactively detecting, measuring, and locating it is crucial to
   maintaining high QoS and timely resolution of crippling end-to-end
   throughput issues.  To this effect, in a TCP-dominated world, network
   operators have been heavily relying on information present in the