In-band Edge-to-Edge Round Trip Time Measurement
draft-song-ippm-inband-e2e-rtt-measurement-00

Document Type Active Internet-Draft (individual)
Authors Haoyu Song  , Linda Dunbar 
Last updated 2020-11-30
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IPPM                                                             H. Song
Internet-Draft                                                  D. Linda
Intended status: Standards Track                  Futurewei Technologies
Expires: June 3, 2021                                  November 30, 2020

            In-band Edge-to-Edge Round Trip Time Measurement
             draft-song-ippm-inband-e2e-rtt-measurement-00

Abstract

   This draft describes a lightweight in-band edge-to-edge network round
   trip time measurement architecture and suggests implementations.

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.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on June 3, 2021.

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   Copyright (c) 2020 IETF Trust and the persons identified as the
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   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

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   carefully, as they describe your rights and restrictions with respect
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  In-band E2E RTT Measurement Architecture  . . . . . . . . . .   3
   3.  Implementation Considerations . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   In-network service-based traffic engineering or load balancing needs
   to monitor particular flows' edge-to-edge performance, such as round
   trip time (RTT), in the operator's network domain.  The host-based
   ping using ICMPv6 [RFC4443] is of no use because it is usually beyond
   the access of network operators.  The router-based ping, as an active
   measurement approach, cannot reflect the real performance of the
   specific flows under scrutiny.  This is also true for the other
   active measurement approaches such as TWAMP [RFC5357].

   In-situ OAM (IOAM) [I-D.ietf-ippm-ioam-data] supports in-band flow-
   based performance measurement.  However, on the one hand, the IOAM
   trace option is too heavy for the applications which do not care
   about the per-hop performance; on the other hand, the IOAM E2E option
   only supports the one-way measurement.

   Alternate Marking(AM) [RFC8321], mainly designed for one-way
   measurement, can be used to measure the two-way edge-to-edge delay if
   both edges initiate a one-way measurement session.  However, AM's
   measurement interval needs to be large enough to avoid the
   measurement ambiguity, and it requires both edges to conduct the
   measurements and export results to a controller.

   We need a lightweight in-band flow RTT measurement method.
   "Lightweight" means the extra header overhead is low, and the extra
   network processing overhead is also low.  A network operator should
   be able to pick a flow to monitor and get find-grained per-packet RTT

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