Multicast VPN Fast Upstream Failover
draft-ietf-bess-mvpn-fast-failover-15
Document | Type | Active Internet-Draft (bess WG) | ||
---|---|---|---|---|
Authors | Thomas Morin , Robert Kebler , Greg Mirsky | |||
Last updated | 2021-02-05 (latest revision 2021-01-21) | |||
Replaces | draft-morin-bess-mvpn-fast-failover | |||
Stream | IETF | |||
Intended RFC status | Proposed Standard | |||
Formats | plain text xml pdf htmlized (tools) htmlized bibtex | |||
Reviews | ||||
Stream | WG state | Submitted to IESG for Publication | ||
Document shepherd | Stephane Litkowski | |||
Shepherd write-up | Show (last changed 2020-02-26) | |||
IESG | IESG state | RFC Ed Queue | ||
Action Holders |
(None)
|
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Consensus Boilerplate | Yes | |||
Telechat date | ||||
Responsible AD | Martin Vigoureux | |||
Send notices to | Stephane Litkowski <slitkows.ietf@gmail.com> | |||
IANA | IANA review state | Version Changed - Review Needed | ||
IANA action state | RFC-Ed-Ack | |||
RFC Editor | RFC Editor state | EDIT | ||
Details |
Network Working Group T. Morin, Ed. Internet-Draft Orange Intended status: Standards Track R. Kebler, Ed. Expires: July 25, 2021 Juniper Networks G. Mirsky, Ed. ZTE Corp. January 21, 2021 Multicast VPN Fast Upstream Failover draft-ietf-bess-mvpn-fast-failover-15 Abstract This document defines Multicast Virtual Private Network (VPN) extensions and procedures that allow fast failover for upstream failures by allowing downstream Provider Edges (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 Bidirectional Forwarding Detection (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 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 July 25, 2021. Copyright Notice Copyright (c) 2021 IETF Trust and the persons identified as the document authors. All rights reserved. Morin, et al. Expires July 25, 2021 [Page 1] Internet-Draft MVPN Fast Upstream Failover January 2021 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (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 to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Conventions used in this document . . . . . . . . . . . . . . 4 2.1. Requirements Language . . . . . . . . . . . . . . . . . . 4 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 . . . . . . . . . . . . . . 7 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 . . . . . . . . . . . . . 9 3.1.7. Per PE-CE Link BFD Discriminator . . . . . . . . . . 13 3.1.8. Operational Considerations for Monitoring P-Tunnel's Status . . . . . . . . . . . . . . . . . . . . . . . 13 4. Standby C-multicast Route . . . . . . . . . . . . . . . . . . 14 4.1. Downstream PE Behavior . . . . . . . . . . . . . . . . . 15 4.2. Upstream PE Behavior . . . . . . . . . . . . . . . . . . 16 4.3. Reachability Determination . . . . . . . . . . . . . . . 17 4.4. Inter-AS . . . . . . . . . . . . . . . . . . . . . . . . 18 4.4.1. Inter-AS Procedures for downstream PEs, ASBR Fast Failover . . . . . . . . . . . . . . . . . . . . . . 18 4.4.2. Inter-AS Procedures for ASBRs . . . . . . . . . . . . 19 5. Hot Root Standby . . . . . . . . . . . . . . . . . . . . . . 19 6. Duplicate Packets . . . . . . . . . . . . . . . . . . . . . . 20 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 20 7.1. Standby PE Community . . . . . . . . . . . . . . . . . . 20 7.2. BFD Discriminator . . . . . . . . . . . . . . . . . . . . 20 7.3. BFD Discriminator Optional TLV Type . . . . . . . . . . . 21Show full document text