Thanks for the detailed analysis - a definite bookmark! I notice that the NCS55xx mVPN configuration guide (e.g. https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/multicast/65X/b-multicast-cg-ncs5500-65x/b-multicast-cg-ncs5500-65x_chapter_010.html#...