Use Cases and Operational Experience with Multipath TCP
RFC 8041

Document Type RFC - Informational (January 2017; No errata)
Last updated 2017-01-12
Stream IETF
Formats plain text pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Philip Eardley
Shepherd write-up Show (last changed 2016-07-19)
IESG IESG state RFC 8041 (Informational)
Consensus Boilerplate Yes
Telechat date
Responsible AD Mirja K├╝hlewind
Send notices to "Philip Eardley" <philip.eardley@bt.com>, olivier.bonaventure@uclouvain.be
IANA IANA review state Version Changed - Review Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                    O. Bonaventure
Request for Comments: 8041                                     UCLouvain
Category: Informational                                        C. Paasch
ISSN: 2070-1721                                              Apple, Inc.
                                                                G. Detal
                                                                Tessares
                                                            January 2017

        Use Cases and Operational Experience with Multipath TCP

Abstract

   This document discusses both use cases and operational experience
   with Multipath TCP (MPTCP) in real networks.  It lists several
   prominent use cases where Multipath TCP has been considered and is
   being used.  It also gives insight to some heuristics and decisions
   that have helped to realize these use cases and suggests possible
   improvements.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc8041.

Bonaventure, et al.           Informational                     [Page 1]
RFC 8041                    MPTCP Experience                January 2017

Copyright Notice

   Copyright (c) 2017 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
   (http://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
   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 ....................................................3
   2. Use Cases .......................................................4
      2.1. Datacenters ................................................4
      2.2. Cellular/WiFi Offload ......................................5
      2.3. Multipath TCP Proxies ......................................8
   3. Operational Experience ..........................................9
      3.1. Middlebox Interference .....................................9
      3.2. Congestion Control ........................................11
      3.3. Subflow Management ........................................12
      3.4. Implemented Subflow Managers ..............................13
      3.5. Subflow Destination Port ..................................15
      3.6. Closing Subflows ..........................................16
      3.7. Packet Schedulers .........................................17
      3.8. Segment Size Selection ....................................18
      3.9. Interactions with the Domain Name System ..................19
      3.10. Captive Portals ..........................................20
      3.11. Stateless Webservers .....................................20
      3.12. Load-Balanced Server Farms ...............................21
   4. Security Considerations ........................................21
   5. References .....................................................23
      5.1. Normative References ......................................23
      5.2. Informative References ....................................23
   Acknowledgements ..................................................30
   Authors' Addresses ................................................30

Bonaventure, et al.           Informational                     [Page 2]
RFC 8041                    MPTCP Experience                January 2017

1.  Introduction

   Multipath TCP was specified in [RFC6824] and five independent
   implementations have been developed.  As of November 2016, Multipath
   TCP has been or is being implemented on the following platforms:

   o  Linux kernel [MultipathTCP-Linux]

   o  Apple iOS and macOS

   o  Citrix load balancers

   o  FreeBSD [FreeBSD-MPTCP]

   o  Oracle Solaris
Show full document text