RFC 9843 on IGP Flexible Algorithms: Bandwidth, Delay, Metrics, and Constraints

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        RFC 9843

        Title:      IGP Flexible Algorithms: Bandwidth, Delay, 
                    Metrics, and Constraints 
        Author:     S. Hegde,
                    W. Britto,
                    R. Shetty,
                    B. Decraene,
                    P. Psenak,
                    T. Li
        Status:     Standards Track
        Stream:     IETF
        Date:       September 2025
        Mailbox:    shraddha@juniper.net,
                    bwilliam@juniper.net,
                    mrajesh@juniper.net,
                    bruno.decraene@orange.com,
                    ppsenak@cisco.com,
                    tony.li@tony.li
        Pages:      33
        Updates:    RFC 9350

        I-D Tag:    draft-ietf-lsr-flex-algo-bw-con-22.txt

        URL:        https://www.rfc-editor.org/info/rfc9843

        DOI:        10.17487/RFC9843

Many networks configure the IGP link metric relative to the link
capacity, and high bandwidth traffic gets routed per the link
capacity. Flexible Algorithms provide mechanisms to create
constraint-based paths in an IGP. This specification documents a
generic metric-type and a set of bandwidth-related constraints to be
used in Flexible Algorithms. 

This document updates RFC 9350.

This document is a product of the Link State 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 
memo is unlimited.

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