Multicast-Only Fast Reroute
RFC 7431
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Type |
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RFC - Informational
(August 2015; No errata)
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Last updated |
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2015-10-14
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Replaces |
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draft-karan-mofrr
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IETF
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plain text
html
pdf
htmlized
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Alvaro Retana
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Shepherd write-up |
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Show
(last changed 2015-02-11)
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| IESG |
IESG state |
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RFC 7431 (Informational)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Alia Atlas
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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No IANA Actions
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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 selected
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