Cisco Systems' Solution for Multicast in BGP/MPLS IP VPNs
RFC 6037
Independent Submission E. Rosen, Ed.
Request for Comments: 6037 Y. Cai, Ed.
Category: Historic I. Wijnands
ISSN: 2070-1721 Cisco Systems, Inc.
October 2010
Cisco Systems' Solution for Multicast in BGP/MPLS IP VPNs
Abstract
This document describes the MVPN (Multicast in BGP/MPLS IP VPNs)
solution designed and deployed by Cisco Systems. The procedures
specified in this document are largely a subset of the generalized
MVPN framework recently standardized by the IETF. However, as the
deployment of the procedures specified herein predates the
publication of IETF standards (in some cases by over five years), an
implementation based on these procedures differs in some respects
from a fully standards-compliant implementation. These differences
are pointed out in the document.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for the historical record.
This document defines a Historic Document for the Internet community.
This is a contribution to the RFC Series, independently of any other
RFC stream. The RFC Editor has chosen to publish this document at
its discretion and makes no statement about its value for
implementation or deployment. Documents approved for publication by
the RFC Editor are not a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6037.
Copyright Notice
Copyright (c) 2010 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
(http://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.
Rosen, et al. Historic [Page 1]
RFC 6037 Cisco Systems' MVPN Solution October 2010
Table of Contents
1. Introduction ....................................................3
1.1. Specification of Requirements ..............................3
1.2. Scaling Multicast State Information in the Network Core ....3
1.3. Overview ...................................................4
2. Multicast VRFs ..................................................6
3. Multicast Domains ...............................................7
3.1. Model of Operation .........................................7
4. Multicast Tunnels ...............................................7
4.1. Ingress PEs ................................................8
4.2. Egress PEs .................................................8
4.3. Tunnel Destination Address(es) .............................8
4.4. Auto-Discovery .............................................8
4.4.1. MDT-SAFI ...........................................10
4.5. Which PIM Variant to Use ..................................10
4.6. Inter-AS MDT Construction .................................11
4.6.1. The PIM MVPN Join Attribute ........................11
4.6.1.1. Definition ................................11
4.6.1.2. Usage .....................................12
4.7. Encapsulation in GRE ......................................13
4.8. MTU .......................................................14
4.9. TTL .......................................................14
4.10. Differentiated Services ..................................14
4.11. Avoiding Conflict with Internet Multicast ................14
5. The PIM C-Instance and the MT ..................................15
5.1. PIM C-Instance Control Packets ............................15
5.2. PIM C-Instance RPF Determination ..........................15
5.2.1. Connector Attribute ................................16
6. Data MDT: Optimizing Flooding ..................................17
6.1. Limitation of Multicast Domain ............................17
6.2. Signaling Data MDTs .......................................17
6.3. Use of SSM for Data MDTs ..................................19
7. Packet Formats and Constants ...................................20
7.1. MDT TLV ...................................................20
7.2. MDT Join TLV for IPv4 Streams .............................20
7.3. MDT Join TLV for IPv6 Streams .............................21
7.4. Multiple MDT Join TLVs per Datagram .......................22
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