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
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on 14 April 2024.
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Copyright (c) 2023 IETF Trust and the persons identified as the
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extracted from this document must include Revised BSD License text as
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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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