BGP Based Multicast
draft-ietf-bess-bgp-multicast-00
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BESS Z. Zhang
Internet-Draft L. Giuliano
Intended status: Standards Track Juniper Networks
Expires: July 27, 2020 K. Patel
Arrcus
I. Wijnands
M. Mishra
Cisco Systems
A. Gulko
Refinitiv
January 24, 2020
BGP Based Multicast
draft-ietf-bess-bgp-multicast-00
Abstract
This document specifies a BGP address family and related procedures
that allow BGP to be used for setting up multicast distribution
trees. This document also specifies procedures that enable BGP to be
used for multicast source discovery, and for showing interest in
receiving particular multicast flows. Taken together, these
procedures allow BGP to be used as a replacement for other multicast
routing protocols, such as PIM or mLDP. The BGP procedures specified
here are based on the BGP multicast procedures that were originally
designed for use by providers of Multicast Virtual Private Network
service.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC2119.
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
Zhang, et al. Expires July 27, 2020 [Page 1]
Internet-Draft bgp-mcast January 2020
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 July 27, 2020.
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
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.1. Native/unlabeled Multicast . . . . . . . . . . . . . 3
1.1.2. Labeled Multicast . . . . . . . . . . . . . . . . . . 4
1.2. Overview . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.1. (x,g) Multicast . . . . . . . . . . . . . . . . . . . 5
1.2.1.1. Source Discovery for ASM . . . . . . . . . . . . 5
1.2.1.2. ASM Shared-tree-only Mode . . . . . . . . . . . . 6
1.2.1.3. Integration with BGP-MVPN . . . . . . . . . . . . 7
1.2.2. BGP Inband Signaling for mLDP Tunnel . . . . . . . . 7
1.2.3. BGP Sessions . . . . . . . . . . . . . . . . . . . . 7
1.2.4. LAN and Parallel Links . . . . . . . . . . . . . . . 8
1.2.5. Transition . . . . . . . . . . . . . . . . . . . . . 9
2. Specification . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1. BGP NLRIs and Attributes . . . . . . . . . . . . . . . . 10
2.1.1. S-PMSI A-D Route . . . . . . . . . . . . . . . . . . 11
2.1.2. Leaf A-D Route . . . . . . . . . . . . . . . . . . . 11
2.1.3. Source Active A-D Route . . . . . . . . . . . . . . . 12
2.1.4. S-PMSI A-D Route for C-multicast mLDP . . . . . . . . 13
2.1.5. Session Address Extended Community . . . . . . . . . 13
2.2. Procedures . . . . . . . . . . . . . . . . . . . . . . . 14
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