Packet Loss Signaling for Encrypted Protocols
draft-ferrieuxhamchaoui-tsvwg-lossbits-03

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TSVWG                                                   A. Ferrieux, Ed.
Internet-Draft                                         I. Hamchaoui, Ed.
Intended status: Informational                               Orange Labs
Expires: January 29, 2021                               I. Lubashev, Ed.
                                                     Akamai Technologies
                                                        D. Tikhonov, Ed.
                                                  LiteSpeed Technologies
                                                           July 28, 2020

             Packet Loss Signaling for Encrypted Protocols
               draft-ferrieuxhamchaoui-tsvwg-lossbits-03

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
   Task Force (IETF).  Note that other groups may also distribute
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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
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   This Internet-Draft will expire on January 29, 2021.

Copyright Notice

   Copyright (c) 2020 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

Ferrieux, et al.        Expires January 29, 2021                [Page 1]
Internet-Draft                  loss-bits                      July 2020

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Motivation for Passive On-Path Loss Observation . . . . .   3
     1.2.  On-Path Loss Observation  . . . . . . . . . . . . . . . .   3
     1.3.  On-Path Loss Signaling  . . . . . . . . . . . . . . . . .   4
     1.4.  Recommended Use of the Signals  . . . . . . . . . . . . .   4
   2.  Notational Conventions  . . . . . . . . . . . . . . . . . . .   4
   3.  Loss Bits . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Setting the sQuare Bit on Outgoing Packets  . . . . . . .   5
       3.1.1.  Q Run Length Selection  . . . . . . . . . . . . . . .   5
     3.2.  Setting the Loss Event Bit on Outgoing Packets  . . . . .   5
   4.  Using the Loss Bits for Passive Loss Measurement  . . . . . .   6
     4.1.  End-To-End Loss . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Upstream Loss . . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  Correlating End-to-End and Upstream Loss  . . . . . . . .   7
     4.4.  Downstream Loss . . . . . . . . . . . . . . . . . . . . .   7
     4.5.  Observer Loss . . . . . . . . . . . . . . . . . . . . . .   7
   5.  ECN-Echo Event Bit  . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Setting the ECN-Echo Event Bit on Outgoing Packets  . . .   8
     5.2.  Using E Bit for Passive ECN-Reported Congestion
           Measurement . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Protocol Ossification Considerations  . . . . . . . . . . . .   9
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
     7.1.  Optimistic ACK Attack . . . . . . . . . . . . . . . . . .  10
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  10
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   10. Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     10.1.  Since version 02 . . . . . . . . . . . . . . . . . . . .  10
     10.2.  Since version 01 . . . . . . . . . . . . . . . . . . . .  11
     10.3.  Since version 00 . . . . . . . . . . . . . . . . . . . .  11
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  11
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11