P2MP Policy Ping
draft-hb-pim-p2mp-policy-ping-00

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Network Working Group                                    H. Bidgoli, Ed.
Internet-Draft                                                     Nokia
Intended status: Standards Track                                V. Voyer
Expires: January 28, 2021                                    Bell Canada
                                                               P. Parekh
                                                            Cisco System
                                                                Z. Zhang
                                                        Juniper Networks
                                                           July 27, 2020

                            P2MP Policy Ping
                    draft-hb-pim-p2mp-policy-ping-00

Abstract

   SR P2MP policies are set of policies that enable architecture for
   P2MP service delivery.  A P2MP Policy consists of candidate paths
   that connects the Root of the Tree to a set of Leaves.  The P2MP
   policy is composed of replication segments.  A replication segment is
   a forwarding instruction for a candidate path which is downloaded to
   the Root, transit nodes and the leaves.

   This document describes a simple and efficient mechanism that can be
   used to detect data plane failures in P2MP Policy Candidate Paths
   (CPs) and Path Instances (PIs).

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 January 28, 2021.

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Copyright Notice

   Copyright (c) 2020 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
   Provisions Relating to IETF Documents
   (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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
   3.  Motivation  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  P2MP Policy Ping and Traceroute . . . . . . . . . . . . .   3
     3.2.  Packet format and new TLVs  . . . . . . . . . . . . . . .   3
       3.2.1.  Identifying a P2MP Policy . . . . . . . . . . . . . .   4
         3.2.1.1.  P2MP Policy Sub-TLVs  . . . . . . . . . . . . . .   4
     3.3.  Limiting the Scope of Response  . . . . . . . . . . . . .   5
   4.  Operation of P2MP Policy Ping . . . . . . . . . . . . . . . .   5
     4.1.  Replication Segments Connected via a Unicast SR domain  .   5
   5.  IANA Consideration  . . . . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   Each P2MP Policy can have multiple CPs.  The CP with highest
   preference is the active CP while all other CPs are the backup CPs.
   A CP can have multiple PI to allow global optimization of the CP via
   Make Before Break procedures between the active PI and the newly
   setup and optimized PI.

   This document describes a mechanism that can be used to detect data
   plane failures in P2MP Policy Candidate Paths (CP) and its associate
   Path Instances (PI) from the root to a set of leaves.

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   This draft defines two new sub-TLVs to identifier a P2MP Policy and
   reuses concepts from [RFC6425]

2.  Conventions used in this document