{"draft":"draft-ietf-idr-sr-policy-safi-13","doc_id":"RFC9830","title":"Advertising Segment Routing Policies in BGP","authors":["S. Previdi","C. Filsfils","K. Talaulikar, Ed.","P. Mattes","D. Jain"],"format":["HTML","TEXT","PDF","XML"],"page_count":"36","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Inter-Domain Routing","abstract":"A Segment Routing (SR) Policy is an ordered list of segments (also\r\nreferred to as \"instructions\") that define a source-routed policy. An\r\nSR Policy consists of one or more Candidate Paths (CPs), each\r\ncomprising one or more segment lists. A headend can be provisioned\r\nwith these CPs using various mechanisms such as Command-Line\r\nInterface (CLI), Network Configuration Protocol (NETCONF), Path\r\nComputation Element Communication Protocol (PCEP), or BGP.\r\n\r\nThis document specifies how BGP can be used to distribute SR Policy\r\nCPs. It introduces a BGP SAFI for advertising a CP of an SR Policy\r\nand defines sub-TLVs for the Tunnel Encapsulation Attribute to signal\r\ninformation related to these CPs.\r\n\r\nFurthermore, this document updates RFC 9012 by extending the Color\r\nExtended Community to support additional steering modes over SR\r\nPolicy.","pub_date":"September 2025","keywords":[],"obsoletes":[],"obsoleted_by":[],"updates":["RFC9012"],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9830","errata_url":null}