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

Document Type Replaced Internet-Draft (spring WG)
Expired & archived
Authors Greg Mirsky , Jeff Tantsura , Ilya Varlashkin , Mach Chen , Jiang Wenying
Last updated 2020-09-22 (Latest revision 2020-04-26)
Replaced by draft-ietf-spring-bfd
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-spring-bfd
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This Internet-Draft is no longer active.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.)