Multicast-Only Fast Reroute
RFC 7431
Document | Type | RFC - Informational (August 2015; No errata) | |
---|---|---|---|
Authors | Apoorva Karan , Clarence Filsfils , IJsbrand Wijnands , Bruno Decraene | ||
Last updated | 2015-10-14 | ||
Replaces | draft-karan-mofrr | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Alvaro Retana | ||
Shepherd write-up | Show (last changed 2015-02-11) | ||
IESG | IESG state | RFC 7431 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Alia Atlas | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) A. Karan Request for Comments: 7431 C. Filsfils Category: Informational IJ. Wijnands, Ed. ISSN: 2070-1721 Cisco Systems, Inc. B. Decraene Orange August 2015 Multicast-Only Fast Reroute Abstract As IPTV deployments grow in number and size, service providers are looking for solutions that minimize the service disruption due to faults in the IP network carrying the packets for these services. This document describes a mechanism for minimizing packet loss in a network when node or link failures occur. Multicast-only Fast Reroute (MoFRR) works by making simple enhancements to multicast routing protocols such as Protocol Independent Multicast (PIM) and Multipoint LDP (mLDP). Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are 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/rfc7431. Karan et al. Informational [Page 1] RFC 7431 MoFRR August 2015 Copyright Notice Copyright (c) 2015 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. 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. Conventions Used in This Document ..........................3 1.2. Terminology ................................................3 2. Basic Overview ..................................................4 3. Determination of the Secondary UMH ..............................5 3.1. ECMP-Mode MoFRR ............................................5 3.2. Non-ECMP-Mode MoFRR ........................................5 4. Upstream Multicast Hop Selection ................................6 4.1. PIM ........................................................6 4.2. mLDP .......................................................6 5. Detecting Failures ..............................................6 6. MoFRR Applicability to Dual-Plane Topology ......................7 7. Other Topologies ...............................................10 8. Capacity Planning for MoFRR ....................................11 9. PE Nodes .......................................................11 10. Other Applications ............................................11 11. Security Considerations .......................................12 12. References ....................................................12 12.1. Normative References .....................................12 12.2. Informative References ...................................12 Acknowledgments ...................................................13 Contributors ......................................................13 Authors' Addresses ................................................14 Karan et al. Informational [Page 2] RFC 7431 MoFRR August 2015 1. Introduction Different solutions have been developed and deployed to improve service guarantees, both for multicast video traffic and Video on Demand traffic. Most of these solutions are geared towards finding an alternate path around one or more failed network elements (link, node, or path failures). This document describes a mechanism for minimizing packet loss in a network when node or link failures occur. Multicast-only Fast Reroute (MoFRR) works by making simple changes to the way selectedShow full document text