Protocol Assisted Protocol (PAP)
draft-li-rtgwg-protocol-assisted-protocol-01

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Network Working Group                                              Z. Li
Internet-Draft                                                     L. Li
Intended status: Standards Track                                   Y. Gu
Expires: January 9, 2020                                          Huawei
                                                            July 8, 2019

                    Protocol Assisted Protocol (PAP)
              draft-li-rtgwg-protocol-assisted-protocol-01

Abstract

   For routing protocol troubleshooting, different approaches exibit
   merits w.r.t. different situations.  They can be generally divided
   into two categories, the distributive way and the centralized way.  A
   very commonly used distributive approach is to log in possiblly all
   related devices one by one to check massive data via CLI.  Such
   approach provides very detailed device information, however it
   requires operators with high NOC (Network Operation Center)
   experience and suffers from low troubleshooting efficiency and high
   cost.  The centralized approach is realized by collecting data from
   devices via approaches, like the streaming Telemetry or BMP(BGP
   Monitoring Protocol) RFC7854 [RFC7854], for the centralized server to
   analyze all gathered data.  Such approach allows a comprehensive view
   fo the whole network and facilitates automated troubleshooting, but
   is limited by the data collection boundary set by different
   management domains, as well as high network bandwidth and CPU
   computation costs.

   This document proposes a semi-distributive and semi-centralized
   approach for fast routing protocol troubleshooting, localizing the
   target device and possibly the root cause, more precisely.  It
   defines a new protocol, called the PAP (Protocol assisted Protocol),
   for devices to exchange protocol related information between each
   other in both active and on-demand manners.  It allow devices to
   request specific information from other devices and receive replies
   to the requested data.  It also allows actively transmission of
   information without request to inform other devices to better react
   w.r.t. network issues.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Li, et al.               Expires January 9, 2020                [Page 1]
Internet-Draft         Protocol Assisted Protocol              July 2019

Status of This Memo

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

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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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  PAP Usage Use cases . . . . . . . . . . . . . . . . . . .   5
       1.2.1.  Use Case 1: BGP Route Oscillation . . . . . . . . . .   5
       1.2.2.  Use Case 2: RSVP-TE Set Up Failure  . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  PAP Overview  . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  PAP Message Format  . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  Common Header . . . . . . . . . . . . . . . . . . . . . .   8
     4.2.  Negotiation Message . . . . . . . . . . . . . . . . . . .   9
     4.3.  Request Message . . . . . . . . . . . . . . . . . . . . .  10
     4.4.  Reply Message . . . . . . . . . . . . . . . . . . . . . .  10
     4.5.  Notification Message  . . . . . . . . . . . . . . . . . .  11
     4.6.  ACK Message . . . . . . . . . . . . . . . . . . . . . . .  12
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