Technical Summary
One desirable application of Bi-directional Forwarding Detection
(BFD) is to detect a MPLS LSP data plane failure. LSP-Ping is an
existing mechanism for detecting MPLS data plane failures and for
verifying the MPLS LSP data plane against the control plane. BFD can
be used for the former, but not for the latter. However the control
plane processing required for BFD control packets is relatively
smaller than the processing required for LSP-Ping messages. A
combination of LSP-Ping and BFD can be used to provide faster data
plane failure detection and/or make it possible to provide such
detection on a greater number of LSPs. This document describes the
applicability of BFD in relation to LSP-Ping for this application. It
also describes procedures for using BFD in this environment.
Working Group Summary
This working group has operated quite smoothly.
Document Quality
This use of BFD has been implemented and deployed by multiple
vendors.
Personnel
Dave Ward is the Document Shepherd for this document. Ross
Callon is the Responsible Area Director.