Making Route Servers Aware of Data Link Failures at IXPs

Document Type Replaced Internet-Draft (idr WG)
Authors Randy Bush  , Jeffrey Haas  , John Scudder  , Arnold Nipper  , Thomas King 
Last updated 2015-10-14 (latest revision 2015-03-24)
Replaced by draft-ietf-idr-rs-bfd
Stream Internet Engineering Task Force (IETF)
Expired & archived
pdf htmlized bibtex
Stream WG state Adopted by a WG
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-idr-rs-bfd
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


When route servers are used, the data plane is not congruent with the control plane. Therefore, the peers on the Internet exchange can lose data connectivity without the control plane being aware of it, and packets are dropped on the floor. This document proposes the use of BFD between the two peering routers to detect a data plane failure, and then uses BGP next hop cost to signal the state of the data link to the route server(s).


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.)