Requirements for In-situ OAM
draft-brockners-inband-oam-requirements-03

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Last updated 2017-03-13
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Network Working Group                                       F. Brockners
Internet-Draft                                               S. Bhandari
Intended status: Informational                                   S. Dara
Expires: September 14, 2017                                 C. Pignataro
                                                                   Cisco
                                                              H. Gredler
                                                            RtBrick Inc.
                                                                J. Leddy
                                                                 Comcast
                                                               S. Youell
                                                                    JMPC
                                                                D. Mozes
                                              Mellanox Technologies Ltd.
                                                              T. Mizrahi
                                                                 Marvell
                                                             P. Lapukhov
                                                                Facebook
                                                                R. Chang
                                                       Barefoot Networks
                                                          March 13, 2017

                      Requirements for In-situ OAM
               draft-brockners-inband-oam-requirements-03

Abstract

   This document discusses the motivation and requirements for including
   specific operational and telemetry information into data packets
   while the data packet traverses a path between two points in the
   network.  This method is referred to as "in-situ" Operations,
   Administration, and Maintenance (OAM), given that the OAM information
   is carried with the data packets as opposed to in "out-of-band"
   packets dedicated to OAM.  In situ OAM complements other OAM
   mechanisms which use dedicated probe packets to convey OAM
   information.

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
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

Brockners, et al.      Expires September 14, 2017               [Page 1]
Internet-Draft          In-situ OAM Requirements              March 2017

   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on September 14, 2017.

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   Copyright (c) 2017 IETF Trust and the persons identified as the
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Motivation for in-situ OAM  . . . . . . . . . . . . . . . . .   5
     3.1.  Path Congruency Issues with Dedicated OAM Packets . . . .   5
     3.2.  Results Sent to a System Other Than the Sender  . . . . .   6
     3.3.  Overlay and Underlay Correlation  . . . . . . . . . . . .   6
     3.4.  SLA Verification  . . . . . . . . . . . . . . . . . . . .   7
     3.5.  Analytics and Diagnostics . . . . . . . . . . . . . . . .   7
     3.6.  Frame Replication/Elimination Decision for Bi-casting
           /Active-active Networks . . . . . . . . . . . . . . . . .   8
     3.7.  Proof of Transit  . . . . . . . . . . . . . . . . . . . .   8
     3.8.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . .   9
   4.  Considerations for In-situ OAM  . . . . . . . . . . . . . . .  11
     4.1.  Type of Information to be Recorded  . . . . . . . . . . .  11
     4.2.  MTU and Packet Size . . . . . . . . . . . . . . . . . . .  12
     4.3.  Administrative Boundaries . . . . . . . . . . . . . . . .  13
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