LDP Extensions to Support Maximally Redundant Trees
RFC 8320, “LDP Extensions to Support Maximally Redundant Trees”, is a Proposed Standard document published in February 2018 by A. Atlas, K. Tiruveedhula, C. Bowers, J. Tantsura, IJ. Wijnands. The canonical text is published by the RFC Editor.
Abstract
This document specifies extensions to the Label Distribution Protocol (LDP) to support the creation of Label Switched Paths (LSPs) for Maximally Redundant Trees (MRTs). 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 Label Switching Routers (LSRs) and Label Edge Routers (LERs) advertising the MRT Capability.
MRT-FRR uses LDP multi-topology extensions, so three multi-topology IDs have been allocated from the MPLS MT-ID space.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 8320 is hosted at rfc-editor.org. Available in TXT,HTML.
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