MPLS Data Plane Encapsulation for In-situ OAM Data
draft-gandhi-mpls-ioam-sr-02
MPLS Working Group R. Gandhi, Ed.
Internet-Draft Z. Ali
Intended status: Standards Track C. Filsfils
Expires: September 18, 2020 F. Brockners
Cisco Systems, Inc.
B. Wen
V. Kozak
Comcast
March 17, 2020
MPLS Data Plane Encapsulation for In-situ OAM Data
draft-gandhi-mpls-ioam-sr-02
Abstract
In-situ Operations, Administration, and Maintenance (IOAM) records
operational and telemetry information in the data packet while the
packet traverses a path between two nodes in the network. This
document defines how IOAM data fields are transported using the MPLS
data plane encapsulation, including Segment Routing (SR) with MPLS
data plane (SR-MPLS).
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Requirement Language . . . . . . . . . . . . . . . . . . 3
2.2. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 3
3. IOAM Data Field Encapsulation in MPLS Header . . . . . . . . 3
3.1. Indicator Labels . . . . . . . . . . . . . . . . . . . . 5
4. Procedure for Edge-to-Edge IOAM . . . . . . . . . . . . . . . 5
4.1. Edge-to-Edge IOAM Indicator Label Allocation . . . . . . 6
5. Procedure for Hop-by-Hop IOAM . . . . . . . . . . . . . . . . 6
5.1. Hop-by-Hop IOAM Indicator Label Allocation . . . . . . . 7
6. Considerations for ECMP . . . . . . . . . . . . . . . . . . . 7
7. Node Capability . . . . . . . . . . . . . . . . . . . . . . . 8
8. Data Packets with SR-MPLS Header . . . . . . . . . . . . . . 8
9. Security Considerations . . . . . . . . . . . . . . . . . . . 9
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
11.1. Normative References . . . . . . . . . . . . . . . . . . 10
11.2. Informative References . . . . . . . . . . . . . . . . . 11
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 11
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
In-situ Operations, Administration, and Maintenance (IOAM) records
operational and telemetry information within the packet while the
packet traverses a particular network domain. The term "in-situ"
refers to the fact that the IOAM data fields are added to the data
packets rather than being sent within the probe packets specifically
dedicated to OAM or Performance Measurement (PM). The IOAM data
fields are defined in [I-D.ietf-ippm-ioam-data], and can be used for
various use-cases for OAM and PM. The IOAM data fields are further
updated in [I-D.ietf-ippm-ioam-direct-export] for direct export use-
cases and in [I-D.ietf-ippm-ioam-flags] for Loopback and Active
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