On 15/11/2012 22:41, Sander Steffann wrote: ... >>> b) as a user of that EID space I would be at the mercy of >>> PITR operators that I don't even know >> You are at the mercy of a lot of infrastructure components >> today. This is no different. > > Yes it is. *please*please*please* study what happened to 6to4 > and the 2002::/16 prefix before continuing this discussion. The problem there was that the design of 6to4 assumed, and relied on, altruistic cooperation between operators, to ensure that there was a useable route to 2002::/16 *everywhere* in the IPv6 network. That assumption was naive and led to black holes. My main concern with LISP deployment is whether there will be a useable route to EID space *everywhere* in the (non-LISP) network. If that also relies on altruism, I would share Sander's concern. Brian