Making Route Servers Aware of Data Link Failures at IXPs

The information below is for an old version of the document
Document Type Expired Internet-Draft (idr WG)
Last updated 2018-01-04 (latest revision 2017-07-03)
Replaces draft-ymbk-idr-rs-bfd
Stream IETF
Intended RFC status (None)
Expired & archived
plain text pdf html bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


When BGP route servers are used, the data plane is not congruent with the control plane. Therefore, peers at an Internet exchange can lose data connectivity without the control plane being aware of it, and packets are lost. This document proposes the use of a newly defined BGP Subsequent Address Family Identifier (SAFI) both to allow the route server to request its clients use BFD to track data plane connectivity to their peers' addresses, and for the clients to signal that connectivity state back to the route server.


Randy Bush (
Jeffrey Haas (
John Scudder (
Arnold Nipper (
Thomas King (

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