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An Architecture for IP/LDP Fast Reroute Using Maximally Redundant Trees (MRT-FRR) (RFC7812) Disclosure Number: IPCOM000246704D
Original Publication Date: 2016-Jun-01
Included in the Prior Art Database: 2016-Jun-29

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Atlas: AUTHOR [+2]


This document describes a solution for IP/LDP fast reroute [RFC5714]. MRT-FRR creates two alternate forwarding trees that are distinct from the primary next-hop forwarding used during stable operation. These two trees are maximally diverse from each other, providing link and node protection for 100% of paths and failures as long as the failure does not cut the network into multiple pieces. This document defines the architecture for IP/LDP fast reroute with MRT.

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Internet Engineering Task Force (IETF)                          A. Atlas Request for Comments: 7812                                     C. Bowers Category: Standards Track                               Juniper Networks ISSN: 2070-1721                                                G. Enyedi                                                                 Ericsson                                                                June 2016

                 An Architecture for IP/LDP Fast Reroute                Using Maximally Redundant Trees (MRT-FRR)


   This document defines the architecture for IP and LDP Fast Reroute    using Maximally Redundant Trees (MRT-FRR).  MRT-FRR is a technology    that gives link-protection and node-protection with 100% coverage in    any network topology that is still connected after the failure.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on    Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Copyright Notice

   Copyright (c) 2016 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    ( 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.

Atlas, et al.                Standards Track                    [Page 1]
 RFC 7812              MRT Unicast FRR Architecture             June 2016

 Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3

     1.1.  Importance of 100% Coverage . . . . . . . . . . . . . . .   4

     1.2.  Partial Deployment and Backwards Compatibility  . . . . .   5

   2.  Requirements Language . . . . . . . ....