@techreport{many-bess-rfc9252-dual-sid-00, number = {draft-many-bess-rfc9252-dual-sid-00}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-many-bess-rfc9252-dual-sid/00/}, author = {Siva Sivabalan and Param Preet Singh Dhillon and Himanshu Shah and Keyur Patel and Jeremy Whittaker}, title = {{Dual MPLS and SRv6 Service Advertisement in the Absence of Transposition}}, pagetotal = 16, year = 2026, month = jul, day = 6, abstract = {RFC 9252 defines BGP signaling procedures for SRv6 services, including the use of an MPLS Label field and transposition semantics. However, when transposition is not used (i.e., TL = 0), RFC 9252 does not explicitly define the interpretation of the MPLS Label field, leading to ambiguity in control-plane signaling. This document specifies a minimal, backward-compatible extension to RFC 9252 that enables a single route to unambiguously advertise both a valid MPLS Service Label and an SRv6 Service SID. The extension relies on existing MPLS label semantics, without introducing new TLVs, attributes, or changes to the base encoding format.}, }