LDP Extensions to Support Maximally Redundant Trees

The information below is for an old version of the document
Document Type Expired Internet-Draft (mpls WG)
Authors Alia Atlas  , Kishore Tiruveedhula  , Chris Bowers  , Jeff Tantsura  , IJsbrand Wijnands 
Last updated 2016-04-04 (latest revision 2015-09-30)
Replaces draft-atlas-mpls-ldp-mrt
Stream Internet Engineering Task Force (IETF)
Expired & archived
pdf htmlized bibtex
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Stream WG state WG Document
Document shepherd Loa Andersson
IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies extensions to the Label Distribution Protocol(LDP) to support the creation of label-switched paths for Maximally Redundant Trees (MRT). A prime use of MRTs is for unicast and multicast IP/LDP Fast-Reroute, which we will refer to as MRT-FRR. The sole protocol extension to LDP is simply the ability to advertise an MRT Capability. This document describes that extension and the associated behavior expected for LSRs and LERs advertising the MRT Capability. MRT-FRR uses LDP multi-topology extensions and requires three different multi-topology IDs to be allocated from the MPLS MT-ID space.


Alia Atlas (akatlas@juniper.net)
Kishore Tiruveedhula (kishoret@juniper.net)
Chris Bowers (cbowers@juniper.net)
Jeff Tantsura (jeff.tantsura@ericsson.com)
IJsbrand Wijnands (ice@cisco.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)