PIM Signaling Through BIER Core
draft-ietf-bier-pim-signaling-04

Document Type Active Internet-Draft (bier WG)
Last updated 2018-10-17
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BIER Workgroup                                           H. Bidgoli, Ed.
Internet Draft                                               A. Dolganow
Intended status: Standard Track                              J. Kotalwar
                                                                   Nokia
                                                              Fengman Xu
                                                                 Verizon
                                                             IJ. Wijnand
                                                        Mankamana Mishra
                                                     Cisco Systems, Inc.
                                                                Z. Zhang
                                                        Juniper Networks

Expires: April 20, 2019                                 October 17, 2018

                    PIM Signaling Through BIER Core
                    draft-ietf-bier-pim-signaling-04

Abstract  

   Bit Index Explicit Replication (BIER) is an architecture that
   provides multicast forwarding through a "BIER domain" without
   requiring intermediate routers to maintain multicast related per-flow
   state.  Neither does BIER require an explicit tree-building protocol
   for its operation.  A multicast data packet enters a BIER domain at a
   "Bit-Forwarding Ingress Router" (BFIR), and leaves the BIER domain at
   one or more "Bit-Forwarding Egress Routers" (BFERs).  The BFIR router
   adds a BIER header to the packet.  Such header contains a bit-string
   in which each bit represents exactly one BFER to forward the packet
   to.  The set of BFERs to which the multicast packet needs to be
   forwarded is expressed by the according set of bits switched on in
   BIER packet header.

   This document describes the procedure needed for PIM Joins and Prunes
   to be signaled through a BIER core. Allowing PIM routers to run
   traditional PIM multicast services through a BIER core.

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), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.
 

Bidgoli, Xu et al.       Expires April 20, 2019                 [Page 1]
Internet-Draft      PIM Stitching Through BIER Core     October 17, 2018

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   This Internet-Draft will expire on October 8, 2017.

Copyright Notice

   Copyright (c) 2018 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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Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2. Conventions used in this document . . . . . . . . . . . . . . .  3
     2.1. Definitions . . . . . . . . . . . . . . . . . . . . . . . .  3
   3. PIM Signaling Through BIER domain . . . . . . . . . . . . . . .  5
     3.1. Ingress BBR procedure . . . . . . . . . . . . . . . . . . .  6
       3.1.1. Determining EBBR on IBBR  . . . . . . . . . . . . . . .  6
       3.1.4. BIER packet construction at IBBR  . . . . . . . . . . .  7
     3.2. Signaling PIM through the BIER domain procedure . . . . . .  7
     3.3. EBBR procedure  . . . . . . . . . . . . . . . . . . . . . .  8
   4. Datapath Forwarding . . . . . . . . . . . . . . . . . . . . . .  8
     4.1. BFIR tracking of (S,G)  . . . . . . . . . . . . . . . . . .  8
     4.2. Datapath traffic flow . . . . . . . . . . . . . . . . . . .  8
   5. PIM-ASM behavior  . . . . . . . . . . . . . . . . . . . . . . .  9
   6. Applicability to MVPN . . . . . . . . . . . . . . . . . . . . .  9
   7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . .  9
   8. Security Considerations . . . . . . . . . . . . . . . . . . . .  9
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