Manageability of the QUIC Transport Protocol
draft-ietf-quic-manageability-09

Document Type Active Internet-Draft (quic WG)
Authors Mirja K├╝hlewind  , Brian Trammell 
Last updated 2021-01-22
Replaces draft-kuehlewind-quic-manageability
Stream IETF
Intended RFC status Informational
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Stream WG state WG Document (wg milestone: Mar 2021 - QUIC Applicability a... )
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Network Working Group                                      M. Kuehlewind
Internet-Draft                                                  Ericsson
Intended status: Informational                               B. Trammell
Expires: 26 July 2021                                             Google
                                                         22 January 2021

              Manageability of the QUIC Transport Protocol
                    draft-ietf-quic-manageability-09

Abstract

   This document discusses manageability of the QUIC transport protocol,
   focusing on caveats impacting network operations involving QUIC
   traffic.  Its intended audience is network operators, as well as
   content providers that rely on the use of QUIC-aware middleboxes,
   e.g. for load balancing.

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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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 26 July 2021.

Copyright Notice

   Copyright (c) 2021 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
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Kuehlewind & Trammell     Expires 26 July 2021                  [Page 1]
Internet-Draft             QUIC Manageability               January 2021

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Features of the QUIC Wire Image . . . . . . . . . . . . . . .   4
     2.1.  QUIC Packet Header Structure  . . . . . . . . . . . . . .   4
     2.2.  Coalesced Packets . . . . . . . . . . . . . . . . . . . .   6
     2.3.  Use of Port Numbers . . . . . . . . . . . . . . . . . . .   6
     2.4.  The QUIC Handshake  . . . . . . . . . . . . . . . . . . .   7
     2.5.  Integrity Protection of the Wire Image  . . . . . . . . .  11
     2.6.  Connection ID and Rebinding . . . . . . . . . . . . . . .  11
     2.7.  Packet Numbers  . . . . . . . . . . . . . . . . . . . . .  12
     2.8.  Version Negotiation and Greasing  . . . . . . . . . . . .  12
   3.  Network-visible Information about QUIC Flows  . . . . . . . .  12
     3.1.  Identifying QUIC Traffic  . . . . . . . . . . . . . . . .  13
       3.1.1.  Identifying Negotiated Version  . . . . . . . . . . .  13
       3.1.2.  Rejection of Garbage Traffic  . . . . . . . . . . . .  14
     3.2.  Connection Confirmation . . . . . . . . . . . . . . . . .  14
     3.3.  Application Identification  . . . . . . . . . . . . . . .  14
       3.3.1.  Extracting Server Name Indication (SNI)
               Information . . . . . . . . . . . . . . . . . . . . .  15
     3.4.  Flow Association  . . . . . . . . . . . . . . . . . . . .  16
     3.5.  Flow teardown . . . . . . . . . . . . . . . . . . . . . .  16
     3.6.  Flow Symmetry Measurement . . . . . . . . . . . . . . . .  16
     3.7.  Round-Trip Time (RTT) Measurement . . . . . . . . . . . .  17
       3.7.1.  Measuring Initial RTT . . . . . . . . . . . . . . . .  17
       3.7.2.  Using the Spin Bit for Passive RTT Measurement  . . .  17
   4.  Specific Network Management Tasks . . . . . . . . . . . . . .  19
     4.1.  Stateful Treatment of QUIC Traffic  . . . . . . . . . . .  19
     4.2.  Passive Network Performance Measurement and
           Troubleshooting . . . . . . . . . . . . . . . . . . . . .  19
     4.3.  Server Cooperation with Load Balancers  . . . . . . . . .  20
     4.4.  DDoS Detection and Mitigation . . . . . . . . . . . . . .  20
     4.5.  UDP Policing  . . . . . . . . . . . . . . . . . . . . . .  21
     4.6.  Distinguishing Acknowledgment traffic . . . . . . . . . .  21
     4.7.  Quality of Service handling and ECMP  . . . . . . . . . .  22
     4.8.  QUIC and Network Address Translation (NAT)  . . . . . . .  22
       4.8.1.  Resource Conservation . . . . . . . . . . . . . . . .  23
       4.8.2.  "Helping" with routing infrastructure issues  . . . .  23
     4.9.  Filtering behavior  . . . . . . . . . . . . . . . . . . .  24
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