@techreport{geng-savnet-inter-domain-spa-03, number = {draft-geng-savnet-inter-domain-spa-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-geng-savnet-inter-domain-spa/03/}, author = {Nan Geng and Lancheng Qin and Kotikalapudi Sriram and Dan Li}, title = {{Source Prefix Advertisement for Inter-domain SAVNET}}, pagetotal = 12, year = 2026, month = jul, day = 23, abstract = {This document proposes a mechanism that enables a Source AS to actively advertise their locally observed Customer Cone and prefix information to the adjacent Validating AS via a new inter-domain message called Source Prefix Advertisement (SPA). The Validating AS then combines this SPA-carried information with local source address validation-related information to construct more accurate prefix allowlists for interfaces connected to Source ASes.}, }