BIER BFD
draft-hu-bier-bfd-03
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BIER WG Quan Xiong
Internet-Draft Greg Mirsky
Intended status: Standards Track Fangwei Hu
Expires: September 2, 2019 ZTE Corporation
Chang Liu
China Unicom
March 1, 2019
BIER BFD
draft-hu-bier-bfd-03.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 September 2, 2019.
Copyright Notice
Copyright (c) 2019 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 September 2, 2019 [Page 1]
Internet-Draft BIER BFD March 2019
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. Bootstrapping BIER BFD . . . . . . . . . . . . . . . . . . . 3
4.1. BIER OAM Ping Bootstrap . . . . . . . . . . . . . . . . . 3
4.2. IGP protocol Bootstrap . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . 5
6. Active Tail in BIER BFD . . . . . . . . . . . . . . . . . . . 5
7. Security Considerations . . . . . . . . . . . . . . . . . . . 6
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
10.1. Normative References . . . . . . . . . . . . . . . . . . 6
10.2. Informative References . . . . . . . . . . . . . . . . . 7
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
Bit Index Explicit Replication (BIER) [RFC8279] provides optimal
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.
BIER resilience use cases are described in
[I-D.xiong-bier-resilience] including End-to-End 1+1 and 1:1
Protection and the failure detection mechanisms MAY use P2MP BFD and
P2MP active tail detection method respectively.
[I-D.ietf-bfd-multipoint] 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.
[I-D.ietf-bfd-multipoint-active-tail] describes active tail
extensions to the BFD protocol for multipoint networks.
This document describes the procedures for using such mode of BFD
protocol to verify multipoint or multicast connectivity between a
multipoint sender (the "head", Bit-Forwarding Ingress Routers(BFIRs))
and a set of one or more multipoint receivers (the"tails", Bit-
Forwarding Egress Routers(BFERs)). The BIER BFD only supports the
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