DetNet Data Plane: IEEE 802.1 Time Sensitive Networking over SRv6
draft-wang-detnet-tsn-over-srv6-01

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DetNet
Internet-Draft                                                   X. Wang
Intended status: Standards Track                                  J. Dai
Expires: October 30, 2020                                         J. Liu
                                                                   J. Xu
                                                   Fiberhome Telecom LTD
                                                          April 30, 2020

   DetNet Data Plane: IEEE 802.1 Time Sensitive Networking over SRv6
               draft-wang-detnet-tsn-over-srv6-01
Abstract

   This document specifies the Deterministic Networking data plane when
   TSN networks interconnected over an Segment Routing IPv6 Packet
   Switched Networks.

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   This Internet-Draft will expire on Oct 30, 2020.

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Wang, et al.            Expires October 30, 2020                [Page 1]

Internet-Draft           DetNet TSN over SRv6              April 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 by
   a network to DetNet flows.  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