I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written with the intent of improving the operational aspects of the IETF drafts. Comments that are not addressed in last call may be included in AD reviews during the IESG review. Document editors and WG chairs should treat these comments just like any other last call comments. Summary: This document recommends deprecation of the use of Any-Source Multicast (ASM) for interdomain multicast, and instead it recommends the use of Source-Specific Multicast (SSM). From an Operations perspective, deployment is discussed throughout the document. This is important. The proposed specification recommends the deprecation of ASM and as such it brings network simplification and cuts down on technical debt. Specifically, Section 3 greatly discusses deployment trade-offs and comparisons. In regards to configuration, it is allso very well covered in Section 3.1, and the net of it is that configuration complexity is removed in the recommended deployments. Finally, Section 4.9 includes migration considerations. All in all, I believe all major operational considerations are adequately covered. Should the reference for RFC8313 be Normative instead of Informative? Nits: Abstract This document recommends deprecation of the use of Any-Source Multicast (ASM) for interdomain multicast. It recommends the use of Source-Specific Multicast (SSM) for interdomain multicast applications and that hosts and routers in these deployments fully support SSM. CMP: Typo? "and that" does not seem sensible. Thanks, Carlos Pignataro.