I have only a limited understanding of VXLAN and BFD technology. Hence, some of my question may look odd to the insiders. - Never heard of this IPv6 loopback address space before. Is it OK to allocate and use it this way? - Why is echo BFD outside the scope of this document? Can I just turn on echo mode or will extra specifications be needed? - Nits: OLD Ability to monitor path continuity NEW The ability to monitor path continuity OLD BFD packet MUST be encapsulated NEW BFD packets MUST be encapsulated