RFC 9351

Border Gateway Protocol - Link State (BGP-LS) Extensions for Flexible Algorithm Advertisement, February 2023

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K. Talaulikar, Ed.
P. Psenak
S. Zandi
G. Dawra
idr (rtg)

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DOI:  https://doi.org/10.17487/RFC9351

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Flexible Algorithm is a solution that allows some routing protocols (e.g., OSPF and IS-IS) to compute paths over a network based on user-defined (and hence, flexible) constraints and metrics. The computation is performed by routers participating in the specific network in a distributed manner using a Flexible Algorithm Definition (FAD). This definition is provisioned on one or more routers and propagated through the network by OSPF and IS-IS flooding.

Border Gateway Protocol - Link State (BGP-LS) enables the collection of various topology information from the network. This document defines extensions to the BGP-LS address family to advertise the FAD as a part of the topology information from the network.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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