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Segment Routing for Unaffiliated BFD Echo Function

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 "Expired".
Expired & archived
Authors Mach Chen , Cheng Li , Jiang Wenying , Yisong Liu , Xinjun Chen
Last updated 2023-04-16 (Latest revision 2022-10-13)
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Stream Stream state (No stream defined)
Consensus boilerplate Unknown
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document describes how to leverage Segment Routing (SR) to ensure that the Unaffiliated BFD (U-BFD) Echo packets must reach the remote system before being looped back to the local system. This enables that U-BFD works not only for one hop scenario but for multiple hops scenario as well. In addition, this document also defines a way to explicitly specify the loop back path of the U-BFD Echo packets. This is useful in the case where the forward and reverse path of the Echo packets are required to follow the same path.


Mach Chen
Cheng Li
Jiang Wenying
Yisong Liu
Xinjun Chen

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