Flexible Algorithm Definition Advertisement with BGP Link-State

Document Type Replaced Internet-Draft (idr WG)
Authors Ketan Talaulikar  , Peter Psenak  , Shawn Zandi  , Gaurav Dawra 
Last updated 2019-05-29 (latest revision 2019-02-22)
Replaced by draft-ietf-idr-bgp-ls-flex-algo
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state Adopted by a WG
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-idr-bgp-ls-flex-algo
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active.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)
Shawn Zandi (szandi@linkedin.com)
Gaurav Dawra (gdawra.ietf@gmail.com)

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