Internet DRAFT - draft-xiong-detnet-6man-queuing-option

draft-xiong-detnet-6man-queuing-option







DETNET                                                          Q. Xiong
Internet-Draft                                           ZTE Corporation
Intended status: Standards Track                                 J. Zhao
Expires: 14 April 2024                                             CAICT
                                                               R. Gandhi
                                                     Cisco Systems, Inc.
                                                         12 October 2023


                   IPv6 Option for DetNet Data Fields
               draft-xiong-detnet-6man-queuing-option-05

Abstract

   The DetNet data fields defined in Deterministic Latency Action (DLA)
   can be used in enhanced Deterministic Networking (DetNet) to provide
   QoS treatment to achieve deterministic latency.

   This document defines how DetNet data fields are encapsulated in IPv6
   option.

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on 14 April 2024.

Copyright Notice

   Copyright (c) 2023 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/
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   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components



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   extracted from this document must include Revised BSD License text as
   described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Revised BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   3.  The DetNet Options  . . . . . . . . . . . . . . . . . . . . .   3
   4.  Encapsulation of DetNet Options . . . . . . . . . . . . . . .   4
     4.1.  IPv6 Networks . . . . . . . . . . . . . . . . . . . . . .   4
     4.2.  SRv6 Networks . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  New Option for IPv6 . . . . . . . . . . . . . . . . . . .   6
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   According to [RFC8655], Deterministic Networking (DetNet) operates at
   the IP layer and delivers service which provides extremely low data
   loss rates and bounded latency within a network domain.  DetNet data
   planes has been specified in [RFC8938].  The existing deterministic
   technologies are facing large-scale number of nodes and long-distance
   transmission, traffic scheduling, dynamic flows, and other
   controversial issues in large-scale networks.  The enhanced DetNet
   Data plane is required to support a data plane method of flow
   identification and packet treatment.
   [I-D.liu-detnet-large-scale-requirements] has described the
   enhancement requirements for DetNet data plane, it is required to
   support information used by functions ensuring Deterministic Latency.
   [I-D.xiong-detnet-large-scale-enhancements] has proposed the overall
   framework of DetNet enhancements for large-scale deterministic
   networks.  The packet treatment should schedule the resources and
   indicate the behaviour to ensure the deterministic latency.
   Moreover, new functions and related metadata should be supported in
   enhanced DetNet.  [I-D.xiong-detnet-data-fields-edp] has proposed a
   common DetNet data fields and option types for enhanced DetNet data
   plane and defined a Deterministic Latency Action (DLA) option to
   carry queuing-based metadata.

   This document defines how DetNet data fields are encapsulated in IPv6
   option such as Deterministic Latency Action (DLA) data fields.




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2.  Conventions used in this document

2.1.  Terminology

   The terminology is defined as [RFC8655].

2.2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

3.  The DetNet Options

   [I-D.xiong-detnet-data-fields-edp] has proposed a common DetNet data
   fields and option types for enhanced DetNet data plane.  This
   document defines new IPv6 options for DetNet to signal DetNet data
   fields.  The DetNet options helps to discriminate the types of
   mechanisms and specify the related parameters.

   The format of the DetNet options follow the generic definition in
   section 4.2 of [RFC8200].  The DetNet options may be placed either in
   an HbH or a DoH EH.  Multiple options with the same option type MAY
   appear in the same hop-by-hop options or destination options header
   with distinct data.

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |  Option Type  |  Opt Data Len | DetNet-Type   | DetNet-Length |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                                                               |
     +            DetNet Options Data(variable)                      +
     |                                                               |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


                      Figure 1: DetNet Options Format


   [I-D.xiong-detnet-data-fields-edp] has defined a Deterministic
   Latency Action (DLA) option to carry queuing-based metadata.  The
   DetNet DLA option data can be provided as follows:

   Option Type: TBD1, 8-bit option type identifier indicates the DetNet
   Options.



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   Opt Data Len: 8-bit unsigned integer.  Length of this option, in
   octets, not including the first 2 octets.

   Reserved: 8-bit field MUST be set to zero.

   DetNet-Length: 16-bit field indicates the DetNet option length.

   DetNet-Type: 16-bit field indicates the DetNet option type.

   DetNet Options Data: Variable-length field and Option-Type-specific
   data.  [I-D.xiong-detnet-data-fields-edp] has defined a Deterministic
   Latency Action (DLA) option to carry queuing-based metadata.  The
   DetNet option data can be provided as follows:

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     | Option Type   | Opt Data Len  | DetNet-Type   | DetNet-Length |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |          DLA Type             |   Data len    | Ancillary Len |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |DLA option data(list) field determined by DLA Q-Type(variable) |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |DLA ancillary data(list) field determined by DLA Type(variable)|
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+



                     Figure 2: DetNet DLA Option Format


   The definition of the value can be referred as
   [I-D.xiong-detnet-data-fields-edp].  The DetNet option data and
   Ancillary data can be provided one time or in list.

4.  Encapsulation of DetNet Options

4.1.  IPv6 Networks

   The DetNet Options is intended to be placed in an IPv6 HbH EH since
   it must be processed by every DetNet forwarding node along the path.
   For the DetNet DLA option, all DetNet forwarding nodes can use the
   queuing information to achieve the packet forwarding and scheduling.
   The format of DetNet DLA option in IPv6 is as follows.







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                 +-----------------------------------+
                 |         DetNet App-Flow           |
                 |       (original IP) Packet        |
                 +-----------------------------------+
                 |            other EHs              |
                 +-----------------------------------+--\
                 |        IPv6 Hop-by-Hop Ex Hdr     |    |
                 |         (DetNet DLA Option)       | DetNet Options
                 |                                   |    |
                 +-----------------------------------+--/
                 |            IPv6 Header            |
                 +-----------------------------------+
                 |             Data-Link             |
                 +-----------------------------------+
                 |             Physical              |
                 +-----------------------------------+


                 Figure 3: DetNet DLA Option Format in IPv6


4.2.  SRv6 Networks

   The DetNet Options is intended to be placed in an DOH EH before an
   SRH since it must be processed by the DetNet forwarding nodes of the
   SRv6 segment list.  For the DetNet DLA option, the DetNet forwarding
   nodes among SRv6 segment list can use the queuing-based information
   to achieve the packet forwarding and scheduling.  The format of
   DetNet DLA option in SRv6 is as follows.

                 +-----------------------------------+
                 |         DetNet App-Flow           |
                 |       (original IP) Packet        |
                 +-----------------------------------+
                 |       Segment Routing Header      |
                 +-----------------------------------+ ---\
                 |        IPv6 Destination Ex Hdr    |    |
                 |        (DetNet DLA Option)        | DetNet Options
                 |                                   |    |
                 +-----------------------------------+ ---/
                 |            IPv6 Header            |
                 +-----------------------------------+
                 |             Data-Link             |
                 +-----------------------------------+
                 |             Physical              |
                 +-----------------------------------+





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                 Figure 4: DetNet DLA Option Format in SRv6


5.  Security Considerations

   TBA

6.  IANA Considerations

6.1.  New Option for IPv6

   This specification updates the "Destination Options and Hop-by-Hop
   Options" under the "Internet Protocol Version 6 (IPv6) Parameters"
   registry with the values below:

              +======+===================+=================+
              | Type | Description       | Reference       |
              +======+===================+=================+
              | TBD1 | DetNet DLA Option | [this document] |
              +------+-------------------+-----------------+

                                 Table 1

7.  Acknowledgements

   The authors would like to thank Aihua Liu, Peng Liu, Bin Tan, Shaofu
   Peng for their review, suggestions and comments to this document.

8.  Normative References

   [I-D.dang-queuing-with-multiple-cyclic-buffers]
              Liu, B. and J. Dang, "A Queuing Mechanism with Multiple
              Cyclic Buffers", Work in Progress, Internet-Draft, draft-
              dang-queuing-with-multiple-cyclic-buffers-00, 22 February
              2021, <https://www.ietf.org/archive/id/draft-dang-queuing-
              with-multiple-cyclic-buffers-00.txt>.

   [I-D.ietf-detnet-bounded-latency]
              Finn, N., Boudec, J. L., Mohammadpour, E., Zhang, J., and
              B. Varga, "DetNet Bounded Latency", Work in Progress,
              Internet-Draft, draft-ietf-detnet-bounded-latency-10, 8
              April 2022, <https://www.ietf.org/archive/id/draft-ietf-
              detnet-bounded-latency-10.txt>.

   [I-D.joung-detnet-asynch-detnet-framework]
              Joung, J., Ryoo, J., Cheung, T., Li, Y., and P. Liu,
              "Asynchronous Deterministic Networking Framework for
              Large-Scale Networks", Work in Progress, Internet-Draft,



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              draft-joung-detnet-asynch-detnet-framework-00, 26 June
              2022, <https://www.ietf.org/archive/id/draft-joung-detnet-
              asynch-detnet-framework-00.txt>.

   [I-D.liu-detnet-large-scale-requirements]
              Liu, P., Li, Y., Eckert, T., Xiong, Q., and J. Ryoo,
              "Requirements for Large-Scale Deterministic Networks",
              Work in Progress, Internet-Draft, draft-liu-detnet-large-
              scale-requirements-02, 10 April 2022,
              <https://www.ietf.org/archive/id/draft-liu-detnet-large-
              scale-requirements-02.txt>.

   [I-D.peng-6man-deadline-option]
              Peng, S. and B. Tan, "Deadline Option", Work in Progress,
              Internet-Draft, draft-peng-6man-deadline-option-00, 11
              January 2022, <https://www.ietf.org/archive/id/draft-peng-
              6man-deadline-option-00.txt>.

   [I-D.peng-detnet-deadline-based-forwarding]
              Peng, S., Tan, B., and P. Liu, "Deadline Based
              Deterministic Forwarding", Work in Progress, Internet-
              Draft, draft-peng-detnet-deadline-based-forwarding-01, 1
              March 2022, <https://www.ietf.org/archive/id/draft-peng-
              detnet-deadline-based-forwarding-01.txt>.

   [I-D.stein-srtsn]
              Stein, Y. (., "Segment Routed Time Sensitive Networking",
              Work in Progress, Internet-Draft, draft-stein-srtsn-01, 29
              August 2021, <https://www.ietf.org/archive/id/draft-stein-
              srtsn-01.txt>.

   [I-D.xiong-detnet-data-fields-edp]
              Xiong, Q. and D. Yang, "Data Fields for DetNet Enhanced
              Data Plane", Work in Progress, Internet-Draft, draft-
              xiong-detnet-data-fields-edp-00, 10 March 2023,
              <https://datatracker.ietf.org/api/v1/doc/document/draft-
              xiong-detnet-data-fields-edp/>.

   [I-D.xiong-detnet-large-scale-enhancements]
              Xiong, Q. and Z. Du, "DetNet Enhancements for Large-Scale
              Deterministic Networks", Work in Progress, Internet-Draft,
              draft-xiong-detnet-large-scale-enhancements-00, 24
              February 2022, <https://www.ietf.org/archive/id/draft-
              xiong-detnet-large-scale-enhancements-00.txt>.







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   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC2212]  Shenker, S., Partridge, C., and R. Guerin, "Specification
              of Guaranteed Quality of Service", RFC 2212,
              DOI 10.17487/RFC2212, September 1997,
              <https://www.rfc-editor.org/info/rfc2212>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [RFC8200]  Deering, S. and R. Hinden, "Internet Protocol, Version 6
              (IPv6) Specification", STD 86, RFC 8200,
              DOI 10.17487/RFC8200, July 2017,
              <https://www.rfc-editor.org/info/rfc8200>.

   [RFC8655]  Finn, N., Thubert, P., Varga, B., and J. Farkas,
              "Deterministic Networking Architecture", RFC 8655,
              DOI 10.17487/RFC8655, October 2019,
              <https://www.rfc-editor.org/info/rfc8655>.

   [RFC8938]  Varga, B., "Deterministic Networking (DetNet) Data Plane
              Framework", RFC 8938, DOI 10.17487/RFC8938, November 2020,
              <https://www.rfc-editor.org/info/rfc8938>.

Authors' Addresses

   Quan Xiong
   ZTE Corporation
   No.6 Huashi Park Rd
   Wuhan
   Hubei, 430223
   China
   Email: xiong.quan@zte.com.cn


   Junfeng Zhao
   CAICT
   China
   Email: zhaojunfeng@caict.ac.cn


   Rakesh Gandhi
   Cisco Systems, Inc.
   Canada



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   Email: rgandhi@cisco.com


















































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