Updates to the Fast Reroute Procedures for Co-routed Associated Bidirectional Label Switched Paths
RFC 8537, “Updates to the Fast Reroute Procedures for Co-routed Associated Bidirectional Label Switched Paths”, is a Proposed Standard document published in February 2019 by R. Gandhi, H. Shah, J. Whittaker. It updates RFC 4090, RFC 7551. The canonical text is published by the RFC Editor.
Abstract
Resource Reservation Protocol (RSVP) association signaling can be used to bind two unidirectional Label Switched Paths (LSPs) into an associated bidirectional LSP. When an associated bidirectional LSP is co-routed, the reverse LSP follows the same path as its forward LSP. This document updates the fast reroute procedures defined in RFC 4090 to support both single-sided and double-sided provisioned associated bidirectional LSPs. This document also updates the procedure for associating two reverse LSPs defined in RFC 7551 to support co-routed bidirectional LSPs. The fast reroute procedures can ensure that, for the co-routed LSPs, traffic flows on co-routed paths in the forward and reverse directions after a failure event.
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 8537 is hosted at rfc-editor.org. Available in TXT,HTML.
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