TCP Control Block Interdependence
draft-ietf-tcpm-2140bis-05

Document Type Active Internet-Draft (tcpm WG)
Authors Joseph Touch  , Michael Welzl  , Safiqul Islam 
Last updated 2020-06-23 (latest revision 2020-04-29)
Replaces draft-touch-tcpm-2140bis
Stream IETF
Intended RFC status Informational
Formats plain text pdf htmlized (tools) htmlized bibtex
Stream WG state In WG Last Call
Document shepherd Michael Scharf
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to Michael Scharf <michael.scharf@hs-esslingen.de>
TCPM WG                                                       J. Touch
Internet Draft                                              Independent
Intended status: Informational                                 M. Welzl
Obsoletes: 2140                                                S. Islam
Expires: October 2020                                University of Oslo
                                                         April 29, 2020

                      TCP Control Block Interdependence
                        draft-ietf-tcpm-2140bis-05.txt

Status of this Memo

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

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008. The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six
   months and may be updated, replaced, or obsoleted by other documents
   at any time.  It is inappropriate to use Internet-Drafts as
   reference material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html

   This Internet-Draft will expire on October 29, 2020.

Touch, et al.          Expires October 29, 2020                [Page 1]
Internet-Draft    TCP Control Block Interdependence          April 2020

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
   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.

Abstract

   This memo provides guidance to TCP implementers that are intended to
   help improve convergence to steady-state operation without affecting
   interoperability. It updates and replaces RFC 2140's description of
   interdependent TCP control blocks and the ways that part of TCP
   state can be shared among similar concurrent or consecutive
   connections. TCP state includes a combination of parameters, such as
   connection state, current round-trip time estimates, congestion
   control information, and process information. Most of this state is
   maintained on a per-connection basis in the TCP Control Block (TCB),
   but implementations can (and do) share certain TCB information
   across connections to the same host. Such sharing is intended to
   improve overall transient transport performance, while maintaining
   backward-compatibility with existing implementations. The sharing
   described herein is limited to only the TCB initialization and so
   has no effect on the long-term behavior of TCP after a connection
   has been established.

Table of Contents

   1. Introduction...................................................3
   2. Conventions Used in This Document..............................4
   3. Terminology....................................................4
   4. The TCP Control Block (TCB)....................................6
   5. TCB Interdependence............................................6
   6. Temporal Sharing...............................................7
   6.1. Initialization of the new TCB................................7
   6.2. Updates to the new TCB.......................................8
   6.3. Discussion...................................................9
   7. Ensemble Sharing..............................................10

Touch                  Expires October 29, 2020                [Page 2]
Internet-Draft    TCP Control Block Interdependence          April 2020

   7.1. Initialization of a new TCB.................................10
Show full document text