Multicast VPN Fast Upstream Failover
draft-ietf-bess-mvpn-fast-failover-13

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Document Type Active Internet-Draft (bess WG)
Authors Thomas Morin  , Robert Kebler  , Greg Mirsky 
Last updated 2020-12-17 (latest revision 2020-11-15)
Replaces draft-morin-bess-mvpn-fast-failover
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Network Working Group                                      T. Morin, Ed.
Internet-Draft                                                    Orange
Intended status: Standards Track                          R. Kebler, Ed.
Expires: May 19, 2021                                   Juniper Networks
                                                          G. Mirsky, Ed.
                                                               ZTE Corp.
                                                       November 15, 2020

                  Multicast VPN Fast Upstream Failover
                 draft-ietf-bess-mvpn-fast-failover-13

Abstract

   This document defines multicast VPN extensions and procedures that
   allow fast failover for upstream failures by allowing downstream PEs
   to consider the status of Provider-Tunnels (P-tunnels) when selecting
   the upstream PE for a VPN multicast flow.  The fast failover is
   enabled by using RFC 8562 BFD for Multipoint Networks and the new BGP
   Attribute - BFD Discriminator.  Also, the document introduces a new
   BGP Community, Standby PE, extending BGP Multicast VPN routing so
   that a C-multicast route can be advertised toward a Standby Upstream
   PE.

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

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   This Internet-Draft will expire on May 19, 2021.

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

Morin, et al.             Expires May 19, 2021                  [Page 1]
Internet-Draft         MVPN Fast Upstream Failover         November 2020

   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     2.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  UMH Selection Based on Tunnel Status  . . . . . . . . . . . .   5
     3.1.  Determining the Status of a Tunnel  . . . . . . . . . . .   6
       3.1.1.  MVPN Tunnel Root Tracking . . . . . . . . . . . . . .   6
       3.1.2.  PE-P Upstream Link Status . . . . . . . . . . . . . .   7
       3.1.3.  P2MP RSVP-TE Tunnels  . . . . . . . . . . . . . . . .   7
       3.1.4.  Leaf-initiated P-tunnels  . . . . . . . . . . . . . .   8
       3.1.5.  (C-S, C-G) Counter Information  . . . . . . . . . . .   8
       3.1.6.  BFD Discriminator Attribute . . . . . . . . . . . . .   8
       3.1.7.  Per PE-CE Link BFD Discriminator  . . . . . . . . . .  12
   4.  Standby C-multicast Route . . . . . . . . . . . . . . . . . .  12
     4.1.  Downstream PE Behavior  . . . . . . . . . . . . . . . . .  13
     4.2.  Upstream PE Behavior  . . . . . . . . . . . . . . . . . .  14
     4.3.  Reachability Determination  . . . . . . . . . . . . . . .  15
     4.4.  Inter-AS  . . . . . . . . . . . . . . . . . . . . . . . .  15
       4.4.1.  Inter-AS Procedures for downstream PEs, ASBR Fast
               Failover  . . . . . . . . . . . . . . . . . . . . . .  16
       4.4.2.  Inter-AS Procedures for ASBRs . . . . . . . . . . . .  16
   5.  Hot Root Standby  . . . . . . . . . . . . . . . . . . . . . .  16
   6.  Duplicate Packets . . . . . . . . . . . . . . . . . . . . . .  17
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
     7.1.  Standby PE Community  . . . . . . . . . . . . . . . . . .  18
     7.2.  BFD Discriminator . . . . . . . . . . . . . . . . . . . .  18
     7.3.  BFD Discriminator Optional Sub-TLV Type . . . . . . . . .  19
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  20
   10. Contributor Addresses . . . . . . . . . . . . . . . . . . . .  20
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