Flexible Algorithm Definition Advertisement with BGP Link-State

Document Type Expired Internet-Draft (idr WG)
Last updated 2019-01-02 (latest revision 2018-07-01)
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state Candidate for WG Adoption
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Flexible Algorithm is a solution that allows routing protocols (viz. 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 distribute manner using a Flex Algorithm definition. This definition provisioned on one or more routers and propagated (viz. OSPF and IS- IS flooding) through the network. BGP Link-State (BGP-LS) enables the collection of various topology information from the network. This draft defines extensions to BGP- LS address-family to advertise the Flexible Algorithm Definition as a part of the topology information from the network.


Ketan Talaulikar (ketant@cisco.com)
Peter Psenak (ppsenak@cisco.com)

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