BIER BFD
draft-hu-bier-bfd-07
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2020-07-10
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BIER WG Quan Xiong
Internet-Draft Greg Mirsky
Intended status: Standards Track ZTE Corporation
Expires: January 11, 2021 Fangwei Hu
Individual
Chang Liu
China Unicom
July 10, 2020
BIER BFD
draft-hu-bier-bfd-07.txt
Abstract
Point to multipoint (P2MP) BFD is designed to verify multipoint
connectivity. This document specifies the application of P2MP BFD in
BIER network.
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 January 11, 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
(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
Quan Xiong, et al. Expires January 11, 2021 [Page 1]
Internet-Draft BIER BFD July 2020
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 3
2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. Requirements Language . . . . . . . . . . . . . . . . . . 3
3. BIER BFD Encapsulation . . . . . . . . . . . . . . . . . . . 3
4. BIER BFD Session Bootstrapping . . . . . . . . . . . . . . . 3
4.1. BIER OAM Bootstrapping . . . . . . . . . . . . . . . . . 4
4.2. IGP protocol Bootstrapping . . . . . . . . . . . . . . . 4
4.2.1. IS-IS extension for BIER BFD . . . . . . . . . . . . 4
4.2.2. OSPF extension for BIER BFD . . . . . . . . . . . . . 5
5. Discriminators and Packet Demultiplexing . . . . . . . . . . 6
6. Active Tail in BIER BFD . . . . . . . . . . . . . . . . . . . 6
6.1. Unsolicited Head Notification Mode . . . . . . . . . . . 7
7. Security Considerations . . . . . . . . . . . . . . . . . . . 8
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 8
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
9.1. BIER OAM Message Type . . . . . . . . . . . . . . . . . . 8
9.2. BFD Discriminator TLV . . . . . . . . . . . . . . . . . . 8
9.3. BIER BFD Sub-sub-TLV . . . . . . . . . . . . . . . . . . 8
9.4. BIER BFD Sub-TLV . . . . . . . . . . . . . . . . . . . . 9
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
10.1. Normative References . . . . . . . . . . . . . . . . . . 9
10.2. Informative References . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
Bit Index Explicit Replication (BIER) [RFC8279] provides the
forwarding of multicast data packets through a multicast domain. It
does so without requiring any explicit tree-building protocol and
without requiring intermediate nodes to maintain any per-flow state.
[RFC8562] defines a method of using Bidirectional Forwarding
Detection (BFD) to monitor and detect unicast failures between the
sender (head) and one or more receivers (tails) in multipoint or
multicast networks. [RFC8563] describes active tail extensions to
the BFD protocol for multipoint networks.
This document describes the procedures for using such mode of BFD
protocol to monitor connectivity between a multipoint sender, Bit-
Forwarding Ingress Router (BFIR), and a set of one or more multipoint
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