Multicast VPN fast upstream failover
draft-ietf-bess-mvpn-fast-failover-08
Network Working Group T. Morin, Ed.
Internet-Draft Orange
Intended status: Standards Track R. Kebler, Ed.
Expires: February 29, 2020 Juniper Networks
G. Mirsky, Ed.
ZTE Corp.
August 28, 2019
Multicast VPN fast upstream failover
draft-ietf-bess-mvpn-fast-failover-08
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.
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on February 29, 2020.
Morin, et al. Expires February 29, 2020 [Page 1]
Internet-Draft mVPN fast upstream failover August 2019
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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 . . . . . . . . . . . . . . . . . . 6
3.1.7. Per PE-CE link BFD Discriminator . . . . . . . . . . 9
4. Standby C-multicast route . . . . . . . . . . . . . . . . . . 9
4.1. Downstream PE behavior . . . . . . . . . . . . . . . . . 10
4.2. Upstream PE behavior . . . . . . . . . . . . . . . . . . 11
4.3. Reachability determination . . . . . . . . . . . . . . . 12
4.4. Inter-AS . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4.1. Inter-AS procedures for downstream PEs, ASBR fast
failover . . . . . . . . . . . . . . . . . . . . . . 13
4.4.2. Inter-AS procedures for ASBRs . . . . . . . . . . . . 13
5. Hot Root Standby . . . . . . . . . . . . . . . . . . . . . . 14
6. Duplicate packets . . . . . . . . . . . . . . . . . . . . . . 14
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
8. Security Considerations . . . . . . . . . . . . . . . . . . . 15
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 15
10. Contributor Addresses . . . . . . . . . . . . . . . . . . . . 15
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 17
11.1. Normative References . . . . . . . . . . . . . . . . . . 17
11.2. Informative References . . . . . . . . . . . . . . . . . 18
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 18
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