Fast Reroute Extensions to RSVP-TE for LSP Tunnels
RFC 4090, “Fast Reroute Extensions to RSVP-TE for LSP Tunnels”, is a Proposed Standard document published in May 2005 by P. Pan, G. Swallow, A. Atlas. It has since been updated by RFC 8271, RFC 8537, RFC 8796, RFC 9705. The canonical text is published by the RFC Editor.
Abstract
This document defines RSVP-TE extensions to establish backup label-switched path (LSP) tunnels for local repair of LSP tunnels. These mechanisms enable the re-direction of traffic onto backup LSP tunnels in 10s of milliseconds, in the event of a failure.
Two methods are defined here. The one-to-one backup method creates detour LSPs for each protected LSP at each potential point of local repair. The facility backup method creates a bypass tunnel to protect a potential failure point; by taking advantage of MPLS label stacking, this bypass tunnel can protect a set of LSPs that have similar backup constraints. Both methods can be used to protect links and nodes during network failure. The described behavior and extensions to RSVP allow nodes to implement either method or both and to interoperate in a mixed network. [STANDARDS-TRACK]
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 4090 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 4089 IAB and IESG Recommendation for IETF Administrative Restructuring
- RFC 4091 The Alternative Network Address Types Semantics for the Session Description Protocol Grouping Framework
- RFC 4088 Uniform Resource Identifier Scheme for the Simple Network Management Protocol
- RFC 4092 Usage of the Session Description Protocol Alternative Network Address Types Semantics in the Session Initiation Protocol
- RFC 4087 IP Tunnel MIB
- RFC 4093 Problem Statement: Mobile IPv4 Traversal of Virtual Private Network Gateways
- RFC 4086 Randomness Requirements for Security
- RFC 4094 Analysis of Existing Quality-of-Service Signaling Protocols