BGP Link-State Extensions for BGP-only Fabric

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Last updated 2020-03-12 (latest revision 2019-09-09)
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BGP is used as the only routing protocol in some networks today. In such networks, it is useful to get a detailed view of the nodes and underlying links in the topology along with their attributes similar to one available when using link state routing protocols. Such a view of a BGP-only fabric enables use cases like traffic engineering and forwarding of services along paths other than the BGP best path selection. This document defines extensions to the BGP Link-state address-family (BGP-LS) and the procedures for advertisement of the topology in a BGP-only network. It also describes a specific use-case for traffic engineering based on Segment Routing.


Ketan Talaulikar (
Clarence Filsfils (
krishnaswamy ananthamurthy (
Shawn Zandi (
Gaurav Dawra (
Muhammad Durrani (

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