Micro-burst Decreasing in Layer3 Network for Low-Latency Traffic
draft-du-detnet-layer3-low-latency-02
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Zongpeng Du
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Peng Liu
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2021-02-22
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Network Working Group Z. Du
Internet-Draft P. Liu
Intended status: Informational China Mobile
Expires: August 26, 2021 February 22, 2021
Micro-burst Decreasing in Layer3 Network for Low-Latency Traffic
draft-du-detnet-layer3-low-latency-02
Abstract
This document introduces the problem of micro-bursts in layer3
network, and proposed a method to decrease the micro-bursts in layer3
network for low-latency traffic.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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 https://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 August 26, 2021.
Copyright Notice
Copyright (c) 2021 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
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
Du & Liu Expires August 26, 2021 [Page 1]
Internet-Draft L3 Low-latency Traffic February 2021
to this document. Code Components extracted from this document must
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Gaps for Large-scale Layer 3 Deterministic Network . . . . . 3
3. Rethinking the Problem in IP Forwarding . . . . . . . . . . . 3
4. Method to Decrease Micro-bursts . . . . . . . . . . . . . . . 5
4.1. Working Flow of the Method . . . . . . . . . . . . . . . 5
4.2. Process of Edge Node . . . . . . . . . . . . . . . . . . 5
4.3. Process of Forwarding Node . . . . . . . . . . . . . . . 6
5. Analysis of the Proposed Method . . . . . . . . . . . . . . . 6
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
7. Security Considerations . . . . . . . . . . . . . . . . . . . 6
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
9.1. Normative References . . . . . . . . . . . . . . . . . . 7
9.2. Informative References . . . . . . . . . . . . . . . . . 7
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7
1. Introduction
The DetNet architecture in RFC 8655 [RFC8655] is supposed to work in
campus-wide networks and private WANs, including the large-scale ISP
network scenario, such as the 5G bearing network mentioned in RFC
8578 [RFC8578]. It is essential for the large-scale ISP network to
be able to provide the low-latency service. The low-latency
requirement exists in both L2 and L3 networks, and in both small and
large networks.
However, as talked in [I-D.qiang-detnet-large-scale-detnet],
deploying deterministic services in a large-scale network brings a
lot of new challenges. A novel method called LDN (Large-scale
Deterministic Network) is introduced in
[I-D.qiang-detnet-large-scale-detnet], which explores the
deterministic forwarding over a large-scale network.
This document also explores the deterministic service in the large-
scale layer 3 network, and proposed a method based on micro-burst
decreasing, which can benefit the forwarding of low-latency traffic
in a large-scale network.
Du & Liu Expires August 26, 2021 [Page 2]
Internet-Draft L3 Low-latency Traffic February 2021
2. Gaps for Large-scale Layer 3 Deterministic Network
According to RFC 8655 [RFC8655], DetNet operates at the IP layer and
delivers service over lower-layer technologies such as MPLS and IEEE
802.1 Time-Sensitive Networking (TSN). However, the TSN mechanisms
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