Internet DRAFT - draft-shi-ippm-congestion-measurement-ipv6-options
draft-shi-ippm-congestion-measurement-ipv6-options
IP Performance Measurement H. Shi, Ed.
Internet-Draft T. Zhou
Intended status: Standards Track Huawei
Expires: 5 September 2024 Y. Liu
M. Han
China Unicom
4 March 2024
IPv6 Options for Congestion Measurement
draft-shi-ippm-congestion-measurement-ipv6-options-00
Abstract
The Congestion Measurement enables precise congestion control, aids
in effective load balancing, and simplifies network debugging by
accurately reflecting the degree of congestion across network paths.
This document outlines how Congestion Measurement Data-Fields are
encapsulated in IPv6.
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 5 September 2024.
Copyright Notice
Copyright (c) 2024 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Please review these documents carefully, as they describe your rights
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 2
2. Congestion Measurement Option . . . . . . . . . . . . . . . . 2
2.1. Congestion Measurement Hop-by-hop Options Header (HBH) . 3
2.2. Congestion Measurement Destination Options Header
(DOH) . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Security Considerations . . . . . . . . . . . . . . . . . . . 4
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
5. References . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.1. Normative References . . . . . . . . . . . . . . . . . . 4
5.2. Informative References . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
[I-D.draft-shi-ippm-congestion-measurement-data] defines data fields
of Congestion Measurement which enables sender to obtain the degree
of congestion across the path. This document defines the IPv6
encapsulation of the Congestion Measurement Data-Fields.
1.1. 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.
2. Congestion Measurement Option
One IPv6 header option, Congestion Measurement Option is defined to
carry the Congestion Measurement Data-Fields.
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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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Opt Type = TBD1| Opt Data Len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
. .
. Congestion Measurement Data-Fields (Variable) .
. .
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: Congestion Measurement Option
where:
* Opt Type: Type value is TBD1, an 8-bit unsigned integer.
Identifier of the type of this Congestion Measurement Option.
* Opt Data Len: An 8-bit unsigned integer. Length of the Option
Data field of this option, that is, length of the Congestion
Measurement Data-Fields.
* Congestion Measurement Data-Fields: Option-Type-specific data. It
carries the data fields for Congestion Measurement as specified in
[I-D.draft-shi-ippm-congestion-measurement-data].
2.1. Congestion Measurement Hop-by-hop Options Header (HBH)
The Congestion Measurement option can be carried in the IPv6 Hop-by-
Hop Options Header. In this case, each node along the path can
inspect the Congestion Info Data field if they are configured the
support this option. If the U bit of Congestion Measurement Data-
Fields is set, intermediate nodes will modify the Congestion Info
Data field accordingly.In theory, the presence of the Hop-by-Hop
Option should not affect the traffic throughput both on nodes that do
not recognize this Option and on the nodes that support it. However,
in a real implementation, a packet with a Hop-by-hop Option may be
skipped or processed in the slow path. Proposals to mitigate the
problem are out of the scope for this document.
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2.2. Congestion Measurement Destination Options Header (DOH)
The Congestion Measurement option can be carried in the IPv6
Destination Options Header. In this case, it is usually processed by
the destination node. Note that, if there is also a Routing Header
(RH), any visited destination in the route list can process it. If
the U bit of Congestion Measurement Data-Fields is set, intermediate
nodes will modify the Congestion Info Data field accordingly.
3. Security Considerations
TBD.
4. IANA Considerations
IANA is requested to assign an IPv6 Header Option as follows:
+=======+===============================+===========+
| Value | Description | Reference |
+=======+===============================+===========+
| TBD1 | Congestion Measurement Option | Section 2 |
+-------+-------------------------------+-----------+
Table 1
5. References
5.1. Normative References
[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/rfc/rfc2119>.
[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/rfc/rfc8174>.
5.2. Informative References
[I-D.draft-shi-ippm-congestion-measurement-data]
Shi, H., Zhou, T., and Z. Li, "Data Fields for Congestion
Measurement", Work in Progress, Internet-Draft, draft-shi-
ippm-congestion-measurement-data-00, 3 March 2024,
<https://datatracker.ietf.org/doc/html/draft-shi-ippm-
congestion-measurement-data-00>.
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Authors' Addresses
Hang Shi (editor)
Huawei
Beijing
China
Email: shihang9@huawei.com
Tianran Zhou
Huawei
Beijing
China
Email: zhoutianran@huawei.com
Ying Liu
China Unicom
Beijing
China
Email: liuy619@chinaunicom.cn
Mengyao Han
China Unicom
Beijing
China
Email: hanmy12@chinaunicom.cn
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