Multicast VPN Fast Upstream Failover
draft-ietf-bess-mvpn-fast-failover-14
| Document | Type | Active Internet-Draft (bess WG) | |
|---|---|---|---|
| Authors | Thomas Morin , Robert Kebler , Greg Mirsky | ||
| Last updated | 2020-12-21 | ||
| 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 | IESG Evaluation::AD Followup | |
| Consensus Boilerplate | Yes | ||
| Telechat date |
Has a DISCUSS. Has enough positions to pass once DISCUSS positions are resolved. |
||
| Responsible AD | Martin Vigoureux | ||
| Send notices to | Stephane Litkowski <slitkows.ietf@gmail.com> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
Network Working Group T. Morin, Ed.
Internet-Draft Orange
Intended status: Standards Track R. Kebler, Ed.
Expires: June 24, 2021 Juniper Networks
G. Mirsky, Ed.
ZTE Corp.
December 21, 2020
Multicast VPN Fast Upstream Failover
draft-ietf-bess-mvpn-fast-failover-14
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
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This Internet-Draft will expire on June 24, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Morin, et al. Expires June 24, 2021 [Page 1]
Internet-Draft MVPN Fast Upstream Failover December 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions used in this document . . . . . . . . . . . . . . 3
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 . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.1. Inter-AS Procedures for downstream PEs, ASBR Fast
Failover . . . . . . . . . . . . . . . . . . . . . . 16
4.4.2. Inter-AS Procedures for ASBRs . . . . . . . . . . . . 17
5. Hot Root Standby . . . . . . . . . . . . . . . . . . . . . . 17
6. Duplicate Packets . . . . . . . . . . . . . . . . . . . . . . 18
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 . . . . . . . . . . . . . . . . . . . 20
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 20
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