Postcard-based On-Path Flow Data Telemetry using Packet Marking
draft-song-ippm-postcard-based-telemetry-08
IPPM H. Song
Internet-Draft Futurewei
Intended status: Informational T. Zhou
Expires: May 3, 2021 Z. Li
Huawei
G. Mirsky
ZTE Corp.
J. Shin
SK Telecom
K. Lee
LG U+
October 30, 2020
Postcard-based On-Path Flow Data Telemetry using Packet Marking
draft-song-ippm-postcard-based-telemetry-08
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 [I-D.ietf-ippm-ioam-direct-export], 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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provisions of BCP 78 and BCP 79.
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on May 3, 2021.
Song, et al. Expires May 3, 2021 [Page 1]
Internet-Draft PBT using Packet Marking October 2020
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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
diagnosis.
The telemetry data include but not limited to the detailed forwarding
path, the timestamp/latency at each network node, and, in case of
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