MPLS Generic Associated Channel
RFC 5586, “MPLS Generic Associated Channel”, is a Proposed Standard document published in June 2009 by M. Bocci, M. Vigoureux, S. Bryant. It updates RFC 3032, RFC 4385, RFC 5085. It has since been updated by RFC 6423, RFC 7026, RFC 7214, RFC 7274. The canonical text is published by the RFC Editor.
Abstract
This document generalizes the applicability of the pseudowire (PW) Associated Channel Header (ACH), enabling the realization of a control channel associated to MPLS Label Switched Paths (LSPs) and MPLS Sections in addition to MPLS pseudowires. In order to identify the presence of this Associated Channel Header in the label stack, this document also assigns one of the reserved MPLS label values to the Generic Associated Channel Label (GAL), to be used as a label based exception mechanism.
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 5586 is hosted at rfc-editor.org. Available in TXT,HTML.
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