BIER Ingress Multicast Flow Overlay using Multicast Listener Discovery Protocols
draft-ietf-bier-mld-04
Network Working Group P. Pfister
Internet-Draft IJ. Wijnands
Intended status: Standards Track S. Venaas
Expires: September 7, 2020 Cisco Systems
C. Wang
Z. Zhang
ZTE Corporation
M. Stenberg
March 6, 2020
BIER Ingress Multicast Flow Overlay using Multicast Listener Discovery
Protocols
draft-ietf-bier-mld-04
Abstract
This document specifies the ingress part of a multicast flow overlay
for BIER networks. Using existing multicast listener discovery
protocols, it enables multicast membership information sharing from
egress routers, acting as listeners, toward ingress routers, acting
as queriers. Ingress routers keep per-egress-router state, used to
construct the BIER bit mask associated with IP multicast packets
entering the BIER domain.
Status of This Memo
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This Internet-Draft will expire on September 7, 2020.
Copyright Notice
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document authors. All rights reserved.
Pfister, et al. Expires September 7, 2020 [Page 1]
Internet-Draft MLD BIER overlay March 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Applicability Statement . . . . . . . . . . . . . . . . . . . 4
5. Querier and Listener Specifications . . . . . . . . . . . . . 4
5.1. Configuration Parameters . . . . . . . . . . . . . . . . 5
5.2. MLDv2 instances. . . . . . . . . . . . . . . . . . . . . 6
5.2.1. Sending Queries . . . . . . . . . . . . . . . . . . . 6
5.2.2. Sending Reports . . . . . . . . . . . . . . . . . . . 6
5.2.3. Receiving Queries . . . . . . . . . . . . . . . . . . 7
5.2.4. Receiving Reports . . . . . . . . . . . . . . . . . . 8
5.3. Packet Forwarding . . . . . . . . . . . . . . . . . . . . 8
6. BIER MLD/IGMP Extension Type . . . . . . . . . . . . . . . . 8
7. Security Considerations . . . . . . . . . . . . . . . . . . . 9
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 10
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
10.1. Normative References . . . . . . . . . . . . . . . . . . 10
10.2. Informative References . . . . . . . . . . . . . . . . . 11
Appendix A. BIER Use Case in Data Centers . . . . . . . . . . . 12
A.1. Convention and Terminology . . . . . . . . . . . . . . . 13
A.2. BIER in data centers . . . . . . . . . . . . . . . . . . 14
A.3. A BIER MLD solution for Virtual Network information . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
The Bit Index Explicit Replication (BIER - [RFC8279]) forwarding
technique enables IP multicast transport across a BIER domain. When
receiving or originating a packet, ingress routers have to construct
a bit mask indicating which BIER egress routers located within the
same BIER domain will receive the packet. A stateless approach would
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