> Provides a very simple mechanism for a single host or interface, to be able to run 2^64 virtual machines, with their own global IPv6 address It's not uncommo

> Provides a very simple mechanism for a single host or interface, to be able to run 2^64 virtual machines, with their own global IPv6 address It's not uncommon to have multiple layers of virtualization (e.g. lxc/docker running inside qemu/kvm). You'd need top-level hypervisor to passthrough (bridge?) nested VMs requests back to the router, but then you don't have same level of isolation. Configurable prefix length when nesting (/64 at first level, /80 at 2nd, /96 at 3rd if needed) and automated NDP proxying could solve it, though.