TCP Control Block Interdependence
draft-ietf-tcpm-2140bis-06

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TCPM WG                                                       J. Touch
Internet Draft                                              Independent
Intended status: Informational                                 M. Welzl
Obsoletes: 2140                                                S. Islam
Expires: May 2021                                    University of Oslo
                                                      November 25, 2020

                      TCP Control Block Interdependence
                        draft-ietf-tcpm-2140bis-06.txt

Status of this Memo

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   This Internet-Draft will expire on May 25, 2021.

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Internet-Draft    TCP Control Block Interdependence       November 2020

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   Copyright (c) 2020 IETF Trust and the persons identified as the
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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 May 25, 2021                  [Page 2]
Internet-Draft    TCP Control Block Interdependence       November 2020

   7.1. Initialization of a new TCB.................................10