(to: SPRING WG; cc: MPLS and 6MAN WGs) Dear WG,
With the renewed interest in service programming at recent IETF meetings, we would like to resume discussion on draft-ietf-spring-sr-service-programming (“Service Programming with Segment Routing”) to progress and complete this work as a solid foundation for future proposals. https://datatracker.ietf.org/doc/draft-ietf-spring-sr-service-programming/ This draft describes the data plane mechanisms required for service segments and service programming in SR-MPLS and SRv6 networks. Its goal is to enable the integration of physical or virtual network functions into SR policies by associating each service with a SID. The draft defines two types of services: - SR-aware services, which natively process SR information in packets - SR-unaware services, which require an SR proxy to handle or adapt SR headers before the service function processes the packet. To support SR-unaware services, the draft specifies several SR proxy behaviors, outlining their respective benefits and limitations. Finally, the draft describes how service-related metadata can be carried in both SR-MPLS and SRv6 packets. We welcome any feedback, comments, or suggestions you may have on the draft. Thanks, Francois (on behalf of the co-authors)
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