draft-ietf-sfc-nsh-ecn-support-01.txt   draft-ietf-sfc-nsh-ecn-support-02.txt 
INTERNET-DRAFT Donald Eastlake INTERNET-DRAFT Donald Eastlake
Intended status: Proposed Standard Futurewei Technologies Intended status: Proposed Standard Futurewei Technologies
Bob Briscoe Bob Briscoe
Independent Independent
Andrew Malis Andrew Malis
Futurewei Technologies Futurewei Technologies
Expires: January 6, 2020 July 7, 2019 Expires: June 31, 2020 January 1, 2020
Explicit Congestion Notification (ECN) and Congestion Feedback Explicit Congestion Notification (ECN) and Congestion Feedback
Using the Network Service Header (NSH) Using the Network Service Header (NSH)
<draft-ietf-sfc-nsh-ecn-support-01.txt> <draft-ietf-sfc-nsh-ecn-support-02.txt>
Abstract Abstract
Explicit congestion notification (ECN) allows a forwarding element to Explicit congestion notification (ECN) allows a forwarding element to
notify downstream devices of the onset of congestion without having notify downstream devices of the onset of congestion without having
to drop packets. Coupled with a means to feed back information about to drop packets. Coupled with a means to feed back information about
congestion to upstream nodes, this can improve network efficiency congestion to upstream nodes, this can improve network efficiency
through better congestion control, frequently without packet drops. through better congestion control, frequently without packet drops.
This document specifies ECN and congestion feedback support within a This document specifies ECN and congestion feedback support within a
Service Function Chaining (SFC) domain through use of the Network Service Function Chaining (SFC) domain through use of the Network
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3.2.1 At NSH Transit Nodes................................12 3.2.1 At NSH Transit Nodes................................12
3.2.2 At an SF/Proxy......................................13 3.2.2 At an SF/Proxy......................................13
3.2.3 At Other Forwarding Nodes...........................13 3.2.3 At Other Forwarding Nodes...........................13
3.3 At Exit/Egress........................................13 3.3 At Exit/Egress........................................13
3.4 Conservation of Packets...............................14 3.4 Conservation of Packets...............................14
4. Tunnel Congestion Feedback Support.....................15 4. Tunnel Congestion Feedback Support.....................15
5. IANA Considerations....................................16 5. IANA Considerations....................................16
6. Security Considerations................................17 6. Security Considerations................................17
7. Acknowledgements.......................................17 7. Acknowledgements.......................................17
Normative References......................................18 Normative References......................................18
Informative References....................................19 Informative References....................................19
Authors' Addresses........................................20
INTERNET-DRAFT NSH ECN & Congestion Feedback INTERNET-DRAFT NSH ECN & Congestion Feedback
1. Introduction 1. Introduction
Explicit congestion notification (ECN [RFC3168]) allows a forwarding Explicit congestion notification (ECN [RFC3168]) allows a forwarding
element to notify downstream devices of the onset of congestion element to notify downstream devices of the onset of congestion
without having to drop packets. Coupled with a means to feed back without having to drop packets. Coupled with a means to feed back
information about congestion to upstream nodes, this can improve information about congestion to upstream nodes, this can improve
network efficiency through better congestion control, frequently network efficiency through better congestion control, frequently
without packet drops. This document specifies ECN and congestion without packet drops. This document specifies ECN and congestion
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Explicit Congestion Notification (ECN) Semantics for Ultra-Low Explicit Congestion Notification (ECN) Semantics for Ultra-Low
Queuing Delay (L4S)", draft-ietf-tsvwg-ecn-l4s-id, work in Queuing Delay (L4S)", draft-ietf-tsvwg-ecn-l4s-id, work in
progress. progress.
INTERNET-DRAFT NSH ECN & Congestion Feedback INTERNET-DRAFT NSH ECN & Congestion Feedback
Authors' Addresses Authors' Addresses
Donald E. Eastlake, 3rd Donald E. Eastlake, 3rd
Futurewei Technologies Futurewei Technologies
1424 Pro Shop Court 2386 Panoramic Circle
Davenport, FL 33896 USA Apopka, FL 32703 USA
Tel: +1-508-333-2270 Tel: +1-508-333-2270
Email: d3e3e3@gmail.com Email: d3e3e3@gmail.com
Bob Briscoe Bob Briscoe
Independent Independent
UK UK
Email: ietf@bobbriscoe.net Email: ietf@bobbriscoe.net
URI: http://bobbriscoe.net/ URI: http://bobbriscoe.net/
Andrew G. Malis Andrew G. Malis
Futurewei Technologies Futurewei Technologies
Email: agmalis@gmail.com Email: agmalis@gmail.com
INTERNET-DRAFT NSH ECN & Congestion Feedback INTERNET-DRAFT NSH ECN & Congestion Feedback
Copyright and IPR Provisions Copyright and IPR Provisions
Copyright (c) 2019 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
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