TCP Control Block Interdependence
draft-ietf-tcpm-2140bis-00

Document Type Active Internet-Draft (tcpm WG)
Last updated 2019-04-15
Replaces draft-touch-tcpm-2140bis
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TCPM WG                                                       J. Touch
Internet Draft                                              Independent
Intended status: Informational                                 M. Welzl
Obsoletes: 2140                                                S. Islam
Expires: October 2019                                University of Oslo
                                                         April 15, 2019

                      TCP Control Block Interdependence
                        draft-ietf-tcpm-2140bis-00.txt

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on October 15, 2019.

Touch, et al.          Expires October 15, 2019                [Page 1]
Internet-Draft    TCP Control Block Interdependence          April 2019

Copyright Notice

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   This document is subject to BCP 78 and the IETF Trust's Legal
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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..............................3
   3. Terminology....................................................4
   4. The TCP Control Block (TCB)....................................4
   5. TCB Interdependence............................................5
   6. An Example of Temporal Sharing.................................5
   7. An Example of Ensemble Sharing.................................9
   8. Compatibility Issues..........................................11
   9. Implications..................................................13
   10. Implementation Observations..................................14

Touch                  Expires October 15, 2019                [Page 2]
Internet-Draft    TCP Control Block Interdependence          April 2019

   11. Updates to RFC 2140..........................................15
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