Multicast VPN fast upstream failover
draft-ietf-bess-mvpn-fast-failover-10

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Network Working Group                                      T. Morin, Ed.
Internet-Draft                                                    Orange
Intended status: Standards Track                          R. Kebler, Ed.
Expires: August 13, 2020                                Juniper Networks
                                                          G. Mirsky, Ed.
                                                               ZTE Corp.
                                                       February 10, 2020

                  Multicast VPN fast upstream failover
                 draft-ietf-bess-mvpn-fast-failover-10

Abstract

   This document defines multicast VPN extensions and procedures that
   allow fast failover for upstream failures, by allowing downstream PEs
   to take into account the status of Provider-Tunnels (P-tunnels) when
   selecting the upstream PE for a VPN multicast flow, and extending BGP
   MVPN routing so that a C-multicast route can be advertised toward a
   standby upstream PE.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 13, 2020.

Morin, et al.            Expires August 13, 2020                [Page 1]
Internet-Draft         mVPN fast upstream failover         February 2020

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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  UMH Selection based on tunnel status  . . . . . . . . . . . .   3
     3.1.  Determining the status of a tunnel  . . . . . . . . . . .   4
       3.1.1.  mVPN tunnel root tracking . . . . . . . . . . . . . .   5
       3.1.2.  PE-P Upstream link status . . . . . . . . . . . . . .   5
       3.1.3.  P2MP RSVP-TE tunnels  . . . . . . . . . . . . . . . .   5
       3.1.4.  Leaf-initiated P-tunnels  . . . . . . . . . . . . . .   6
       3.1.5.  (C-S, C-G) counter information  . . . . . . . . . . .   6
       3.1.6.  BFD Discriminator Attribute . . . . . . . . . . . . .   6
       3.1.7.  Per PE-CE link BFD Discriminator  . . . . . . . . . .   9
   4.  Standby C-multicast route . . . . . . . . . . . . . . . . . .  10
     4.1.  Downstream PE behavior  . . . . . . . . . . . . . . . . .  10
     4.2.  Upstream PE behavior  . . . . . . . . . . . . . . . . . .  12
     4.3.  Reachability determination  . . . . . . . . . . . . . . .  13
     4.4.  Inter-AS  . . . . . . . . . . . . . . . . . . . . . . . .  13
       4.4.1.  Inter-AS procedures for downstream PEs, ASBR fast
               failover  . . . . . . . . . . . . . . . . . . . . . .  14
       4.4.2.  Inter-AS procedures for ASBRs . . . . . . . . . . . .  14
   5.  Hot Root Standby  . . . . . . . . . . . . . . . . . . . . . .  14
   6.  Duplicate packets . . . . . . . . . . . . . . . . . . . . . .  15
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
     7.1.  BFD Discriminator . . . . . . . . . . . . . . . . . . . .  15
     7.2.  BFD Discriminator Extension Type  . . . . . . . . . . . .  16
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  17
   10. Contributor Addresses . . . . . . . . . . . . . . . . . . . .  17
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  19