DetNet Data Plane: IEEE 802.1 Time Sensitive Networking over SRv6
draft-wang-detnet-tsn-over-srv6-02
DetNet
Internet-Draft X. Wang
Intended status: Standards Track J. Dai
Expires: April 30, 2021 J. Liu
J. Xu
Fiberhome Telecom LTD
October 29, 2020
DetNet Data Plane: IEEE 802.1 Time Sensitive Networking over SRv6
draft-wang-detnet-tsn-over-srv6-02
Abstract
This document specifies the Deterministic Networking data plane when
TSN networks interconnected over an Segment Routing IPv6 Packet
Switched Networks.
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 April 30, 2021.
Copyright Notice
Copyright (c) 2020 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
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Wang, et al. Expires April 30, 2021 [Page 1]
Internet-Draft DetNet TSN over SRv6 October 2020
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Terms Used in This Document . . . . . . . . . . . . . . . 3
2.2. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 3
3. Requirements Language . . . . . . . . . . . . . . . . . . . . 4
4. IEEE 802.1 TSN Over SRv6 Data Plane Scenario . . . . . . . . . 4
5. IEEE 802.1 TSN Operation Over SRv6 Sub-Networks. . . . . . . 5
5.1. Mapping of TSN Stream ID and Sequence Number . . . . . . . 5
5.2. SRv6 Network Programming new Functions . . . . . . . . . . 8
5.2.1. End. B.Replication DetNet SID: Packet Replication
Function . . . . . . . . . . . . . . . . . . . . . . 8
5.2.2. End. B. Elimination: Packet Elimination Function. . . . 9
6. SRv6 Data Plane Considerations . . . . . . . . . . . . . . . . 9
6.1. DetNet PREOF . . . . . . . . . . . . . . . . . . . . . . 9
6.2. Edge Node Processing . . . . . . . . . . . . . . . . . . 10
6.3. MTU and Fragmentation . . . . . . . . . . . . . . . . . . 10
7. Management and Control Information Summary. . . . . . . . . . . 11
8. Security Considerations . . . . . . . . . . . . . . . . . . . 12
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
11. Normative References. . . . . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
Deterministic Networking (DetNet) is a service that can be offered as
DetNet flows in network. DetNet provides these flows extremely low
packet loss rates and assured bounded end-to-end delivery latency.
General background and concepts of DetNet can be found in the DetNet
Architecture [RFC8655].
Segment Routing(SR) leverages the source routing paradigm. An ingress
node steers a packet through an ordered list of instructions, called
"segments". SR can be applied over IPv6 data plane using Routing
Extension Header [RFC8754]. A segment in Segment Routing is not
limited to a routing/forwarding function. A SRv6 Segment can
indicate functions that are executed locally in the node where they
are defined. [I-D.ietf-spring-srv6-network-programming] describes
some well-known functions and segments associated to them. SRH TLVs
([RFC8754]) also provides meta-data for segment processing. All
these features make SRv6 suitable to carry DetNet flows by defining
Show full document text