No, the privacy extensions simply use a random interface ID instead of deriving it from the MAC address. You still use a single /64 subnet as usual. (Unless t

No, the privacy extensions simply use a random interface ID instead of deriving it from the MAC address. You still use a single /64 subnet as usual. (Unless there is an aspect of the privacy extensions I'm not familiar with, but this is what people usually mean when they say "privacy extensions.")