Skip to main content

Bidirectional Forwarding Detection (BFD) in Segment Routing Networks Using MPLS Dataplane

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Active".
Expired & archived
Authors Greg Mirsky , Jeff Tantsura , Ilya Varlashkin , Mach Chen , Jiang Wenying
Last updated 2021-09-23 (Latest revision 2021-03-22)
Replaces draft-mirsky-spring-bfd
RFC stream Internet Engineering Task Force (IETF)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Segment Routing (SR) architecture leverages the paradigm of source routing. It can be realized in the Multiprotocol Label Switching (MPLS) network without any change to the data plane. A segment is encoded as an MPLS label, and an ordered list of segments is encoded as a stack of labels. Bidirectional Forwarding Detection (BFD) is expected to monitor any existing path between systems. This document defines how to use Label Switched Path Ping to bootstrap a BFD session, control an SR Policy in the reverse direction of the SR-MPLS tunnel, and applicability of BFD Demand mode in the SR-MPLS domain. Also, the document describes the use of BFD Echo with BFD Control packet payload.


Greg Mirsky
Jeff Tantsura
Ilya Varlashkin
Mach Chen
Jiang Wenying

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)