Load Sharing for the Stream Control Transmission Protocol (SCTP)
draft-tuexen-tsvwg-sctp-multipath-12
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Network Working Group P. Amer
Internet-Draft University of Delaware
Intended status: Experimental M. Becke
Expires: December 4, 2016 HAW Hamburg
T. Dreibholz
Simula Research Laboratory
N. Ekiz
University of Delaware
J. Iyengar
Franklin and Marshall College
P. Natarajan
Cisco Systems
R. Stewart
Adara Networks
M. Tuexen
Muenster Univ. of Appl. Sciences
June 2, 2016
Load Sharing for the Stream Control Transmission Protocol (SCTP)
draft-tuexen-tsvwg-sctp-multipath-12.txt
Abstract
The Stream Control Transmission Protocol (SCTP) supports multi-homing
for providing network fault tolerance. However, mainly one path is
used for data transmission. Only timer-based retransmissions are
carried over other paths as well.
This document describes how multiple paths can be used simultaneously
for transmitting user messages.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
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."
This Internet-Draft will expire on December 4, 2016.
Amer, et al. Expires December 4, 2016 [Page 1]
Internet-Draft Load Sharing for SCTP June 2016
Copyright Notice
Copyright (c) 2016 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
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Load Sharing . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Split Fast Retransmissions . . . . . . . . . . . . . . . 4
3.2. Appropriate Congestion Window Growth . . . . . . . . . . 4
3.3. Appropriate Delayed Acknowledgements . . . . . . . . . . 5
4. Non-Renegable SACK . . . . . . . . . . . . . . . . . . . . . 6
4.1. Negotiation . . . . . . . . . . . . . . . . . . . . . . . 6
4.2. The New Chunk Type: Non-Renegable SACK (NR-SACK) . . . . 6
4.3. An Illustrative Example . . . . . . . . . . . . . . . . . 11
4.4. Procedures . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.1. Sending an NR-SACK chunk . . . . . . . . . . . . . . 15
4.4.2. Receiving an NR-SACK Chunk . . . . . . . . . . . . . 17
5. Buffer Blocking Mitigation . . . . . . . . . . . . . . . . . 18
5.1. Sender Buffer Splitting . . . . . . . . . . . . . . . . . 18
5.2. Receiver Buffer Splitting . . . . . . . . . . . . . . . . 18
5.3. Chunk Rescheduling . . . . . . . . . . . . . . . . . . . 18
5.4. Problems during Path Failure . . . . . . . . . . . . . . 19
5.4.1. Problem Description . . . . . . . . . . . . . . . . . 19
5.4.2. Solution: Potentially-failed Destination State . . . 19
5.5. Non-Renegable SACK . . . . . . . . . . . . . . . . . . . 20
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