Advertising p2mp policies in BGP
draft-hb-idr-sr-p2mp-policy-00

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Last updated 2019-10-30
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Network Working group                                    H. Bidgoli, Ed.
Internet Draft                                                     Nokia
Intended status: Standard Track                            D. Voyer, Ed.
                                                             Bell Canada
                                                            Andrew Stone
                                                                   Nokia
                                                          Rishabh Parekh
                                                             Serge Krier
                                                    Arvind Venkateswaran
                                                     Cisco Systems, Inc.

Expires: April 30, 2020                                 October 28, 2019

                    Advertising p2mp policies in BGP
                    draft-hb-idr-sr-p2mp-policy-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 specifies a new BGP SAFI with a new NLRI in order to
   advertise P2MP policy from a controller to a set of nodes. 

   This document introduces two new route types within this NLRI, one
   for P2MP policy and its candidate paths that need to be programmed on
   the Root node and another for the replication segment and forwarding
   instructions that needs to be programmed on the Root, and optionally
   on Transit and Leaf nodes. 

   It should be noted that this document does not specify how the Root
   and the Leaves are discovered on the controller, it only describes
   how the P2MP Policy and Replication Segments are programmed from the
   controller to the nodes.

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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Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2. Conventions used in this document . . . . . . . . . . . . . . .  4
   3. P2MP Policy and Replication Segment Encoding  . . . . . . . . .  4
     3.1. P2MP Policy SAFI and NLRI . . . . . . . . . . . . . . . . .  4
       3.1.1. P2MP Policy Route . . . . . . . . . . . . . . . . . . .  5
       3.1.2. Non-shared Tree Replication segment Route . . . . . . .  6
       3.1.3. Shared Tree Replication Segment Route . . . . . . . . .  6
     3.3. Tunnel Encapsulation Attribute  . . . . . . . . . . . . . .  7
       3.3.1. SR P2MP policy encoding . . . . . . . . . . . . . . . .  7
       3.3.2. replication segment encoding  . . . . . . . . . . . . .  8
     3.4. P2MP Policy Sub-TLVs  . . . . . . . . . . . . . . . . . . .  8
       3.4.1 preference, policy-name Sub-TLV  . . . . . . . . . . . .  8
       3.4.2. leaf-list Sub-TLV . . . . . . . . . . . . . . . . . . .  8
 

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       3.4.3. path-instance Sub-TLV . . . . . . . . . . . . . . . . .  9
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