Echo Request/Reply for In-situ OAM Capabilities
draft-xiao-ippm-ioam-conf-state-04

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IPPM Working Group                                                X. Min
Internet-Draft                                                 G. Mirsky
Intended status: Standards Track                                     ZTE
Expires: January 9, 2020                                           L. Bo
                                                           China Telecom
                                                            July 8, 2019

            Echo Request/Reply for In-situ OAM Capabilities
                   draft-xiao-ippm-ioam-conf-state-04

Abstract

   This document describes an extension to the echo request/reply
   mechanisms used in SR-MPLS, SRv6, and SFC environments, which can be
   used within an IOAM domain, allowing the IOAM encapsulating node to
   acquire IOAM capabilities of each IOAM transit node and/or IOAM
   decapsulating node.

Status of This Memo

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   This Internet-Draft will expire on January 9, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   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
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   include Simplified BSD License text as described in Section 4.e of

Min, et al.              Expires January 9, 2020                [Page 1]
Internet-Draft      Echo Request/Reply for IOAM Capa           July 2019

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions Used in This Document . . . . . . . . . . . .   3
       1.1.1.  Terminology . . . . . . . . . . . . . . . . . . . . .   3
       1.1.2.  Requirements Language . . . . . . . . . . . . . . . .   4
   2.  IOAM Capabilities Formats . . . . . . . . . . . . . . . . . .   4
     2.1.  IOAM Capabilities TLV in Echo Request . . . . . . . . . .   4
     2.2.  IOAM Capabilities TLV in Echo Reply . . . . . . . . . . .   5
       2.2.1.  IOAM Pre-allocated Tracing Capabilities sub-TLV . . .   6
       2.2.2.  IOAM Incremental Tracing Capabilities sub-TLV . . . .   7
       2.2.3.  IOAM Proof of Transit Capabilities sub-TLV  . . . . .   8
       2.2.4.  IOAM Edge-to-Edge Capabilities sub-TLV  . . . . . . .   9
       2.2.5.  IOAM End-of-Domain sub-TLV  . . . . . . . . . . . . .  11
   3.  Operational Guide . . . . . . . . . . . . . . . . . . . . . .  11
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   The Data Fields for In-situ OAM (IOAM) [I-D.ietf-ippm-ioam-data]
   defines data fields for IOAM which records OAM information within the
   packet while the packet traverses a particular network domain, which
   is called an IOAM domain.  IOAM can be used to complement OAM
   mechanisms based on, e.g., ICMP or other types of probe packets, and
   IOAM mechanisms can be leveraged where mechanisms using, e.g., ICMP
   do not apply or do not offer the desired results.

   As specified in [I-D.ietf-ippm-ioam-data], within the IOAM-domain,
   the IOAM data may be updated by network nodes that the packet
   traverses.  The device which adds an IOAM data container to the
   packet to capture IOAM data is called the "IOAM encapsulating node",
   whereas the device which removes the IOAM data container is referred
   to as the "IOAM decapsulating node".  Nodes within the domain which
   are aware of IOAM data and read and/or write or process the IOAM data
   are called "IOAM transit nodes".  Both the IOAM encapsulating node
   and the decapsulating node are referred to as domain edge devices,
   which can be hosts or network devices.

   In order to add accurate IOAM data container to the packet, the IOAM