TCP Control Block Interdependence
draft-ietf-tcpm-2140bis-01
TCPM WG J. Touch
Internet Draft Independent
Intended status: Informational M. Welzl
Obsoletes: 2140 S. Islam
Expires: May 2020 University of Oslo
November 19, 2019
TCP Control Block Interdependence
draft-ietf-tcpm-2140bis-01.txt
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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)....................................4
5. TCB Interdependence............................................5
6. An Example of Temporal Sharing.................................6
7. An Example of Ensemble Sharing.................................9
8. Compatibility Issues..........................................11
9. Implications..................................................13
10. Implementation Observations..................................14
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11. Updates to RFC 2140..........................................15
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