M-LDP Signaling Through BIER Core
draft-hb-bier-mldp-signaling-over-bier-01

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Last updated 2019-11-04
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BIER Workgroup                                                H. Bidgoli
Internet Draft                                               J. Kotalwar
Intended status: Standard Track                                    Nokia
                                                                 Z.Zhang
                                                        Juniper Networks
                                                            Eddie Leyton
                                                                  Vrizon
                                                        Mankamana Mishra
                                                            I. Wijanands
                                                      Cisco System, Inc.

Expires: May 6, 2020                                    November 3, 2019

                   M-LDP Signaling Through BIER Core
               draft-hb-bier-mldp-signaling-over-bier-01

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 mLDP tunnels to be
   signaled over and stitched through a BIER core, allowing LDP routers
   to run traditional Multipoint LDP 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
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   Drafts.

 

Bidgoli, et al.           Expires May 6, 2020                   [Page 1]
Internet-Draft      MLDP Signaling Through BIER Core    November 3, 2019

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   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors. All rights reserved.

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Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2. Conventions used in this document . . . . . . . . . . . . . . .  3
     2.1. Definitions . . . . . . . . . . . . . . . . . . . . . . . .  3
   3. mLDP Signaling Through BIER domain  . . . . . . . . . . . . . .  4
     3.1. Ingress BBR procedure . . . . . . . . . . . . . . . . . . .  5
       3.1.1. Automatic tLDP session creation . . . . . . . . . . . .  5
       3.1.1. ECMP Method on IBBR . . . . . . . . . . . . . . . . . .  6
     3.2. Egress BBR procedure method . . . . . . . . . . . . . . . .  6
       3.2.1. IBBR procedure upon arriving upstream assigned label  .  6
   4. Datapath Forwarding . . . . . . . . . . . . . . . . . . . . . .  7
     4.1. Datapath traffic flow . . . . . . . . . . . . . . . . . . .  7
   5. Recursive FEC . . . . . . . . . . . . . . . . . . . . . . . . .  7
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  7
   7. Security Considerations . . . . . . . . . . . . . . . . . . . .  7
   8. References  . . . . . . . . . . . . . . . . . . . . . . . . . .  7
     8.1. Normative References  . . . . . . . . . . . . . . . . . . .  7
     8.2. Informative References  . . . . . . . . . . . . . . . . . .  8
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