Postcard-based On-Path Flow Data Telemetry using Packet Marking
draft-song-ippm-postcard-based-telemetry-09
IPPM H. Song
Internet-Draft Futurewei Technologies
Intended status: Informational G. Mirsky
Expires: August 22, 2021 ZTE Corp.
C. Filsfils
A. Abdelsalam
Cisco Systems, Inc.
T. Zhou
Z. Li
Huawei
J. Shin
SK Telecom
K. Lee
LG U+
February 18, 2021
Postcard-based On-Path Flow Data Telemetry using Packet Marking
draft-song-ippm-postcard-based-telemetry-09
Abstract
The document describes a packet-marking variation of the Postcard-
Based Telemetry (PBT), referred to as PBT-M. Unlike the instruction-
based PBT, as embodied in IOAM DEX, PBT-M does not require the
encapsulation of a telemetry instruction header, so it avoids some of
the implementation challenges of the instruction-based PBT. However,
PBT-M has unique issues that need to be considered. This document
serves as a scheme overview and provides design guidelines applicable
to implementations in different network protocols.
Status of This Memo
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 22, 2021.
Song, et al. Expires August 22, 2021 [Page 1]
Internet-Draft PBT using Packet Marking February 2021
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Table of Contents
1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. PBT-M: Marking-based PBT . . . . . . . . . . . . . . . . . . 4
3. New Challenges . . . . . . . . . . . . . . . . . . . . . . . 6
4. PBT-M Design Considerations . . . . . . . . . . . . . . . . . 7
4.1. Packet Marking . . . . . . . . . . . . . . . . . . . . . 7
4.2. Flow Path Discovery . . . . . . . . . . . . . . . . . . . 8
4.3. Packet Identity for Export Data Correlation . . . . . . . 8
4.4. Control the Load . . . . . . . . . . . . . . . . . . . . 9
5. Implementation Recommendation . . . . . . . . . . . . . . . . 9
5.1. Configuration . . . . . . . . . . . . . . . . . . . . . . 9
5.2. Postcard Format . . . . . . . . . . . . . . . . . . . . . 9
5.3. Data Correlation . . . . . . . . . . . . . . . . . . . . 10
6. Security Considerations . . . . . . . . . . . . . . . . . . . 10
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 10
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 10
10. Informative References . . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Motivation
To gain detailed data plane visibility to support effective network
OAM, it is essential to be able to examine the trace of user packets
along their forwarding paths. Such on-path flow data reflect the
state and status of each user packet's real-time experience and
provide valuable information for network monitoring, measurement, and
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