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RFC 9815
Title: BGP Link State (BGP-LS) Shortest
Path First (SPF) Routing
Author: K. Patel,
A. Lindem,
S. Zandi,
W. Henderickx
Status: Standards Track
Stream: IETF
Date: July 2025
Mailbox: [email protected],
[email protected],
[email protected],
[email protected]
Pages: 33
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-lsvr-bgp-spf-51.txt
URL: https://www.rfc-editor.org/info/rfc9815
DOI: 10.17487/RFC9815
Many Massively Scaled Data Centers (MSDCs) have converged on
simplified Layer 3 (L3) routing. Furthermore, requirements for
operational simplicity have led many of these MSDCs to converge on
BGP as their single routing protocol for both fabric routing and Data
Center Interconnect (DCI) routing. This document describes extensions
to BGP for use with BGP Link State (BGP-LS) distribution and the
Shortest Path First (SPF) algorithm. In doing this, it allows BGP to
be efficiently used as both the underlay protocol and the overlay
protocol in MSDCs.
This document is a product of the Link State Vector Routing Working Group of
the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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