Folks, >From the conversation so far, I glean that there are two competing PITR >deployment models. These are:
- User pays - Altruistic party pays Recent experience tells us that only the "user pays" model is viable. So, we are left to choose between the following variations of the "user pays" model: 1) Owner of a LISP site pays 2) Owner of a non-LISP site that access LISP sites pays In http://www.ietf.org/mail-archive/web/lisp/current/msg04955.html, Joel describes a scenario that realizes model #1. In this scenario, a portion of the LISP address block is assigned to an EID allocator. For the purpose of example, assume that a /40 is assigned to the EID Allocator. From this /40, the EID allocator assigns smaller address blocks to its customers. The EID operator also operates one or more PITRs and advertises the /40, as a single aggregate prefix, from each PITR. The owner of the LISP site pays the EID allocator for these services. In http://www.ietf.org/mail-archive/web/lisp/current/msg04965.html, Paul describes a scenario that realizes model #2. In this scenario, an ISP deploys one or more PITRs and announces the entire LISP address block (/32) from each of them. The ISP announces the /32 to its customers only and with the no-export community set. The ISP distributes the cost of the PITRs among its customers in some equitable manner. The major advantage of model #1 is that it allows LISP sites to be globally accessible, even when some ISPs do not deploy PITRs. However, the major disadvantage of model #1 is that it leads to de-aggregation of the LISP address block. De-aggregation may be significant if customers are not required to renumber when the move from one EID allocator to another. The major advantage of model #2 is that it allows the LISP address block to be advertised as a single, aggregate prefix. However, in this model, LISP sites are not accessible from autonomous systems that do not deploy PITRs. Does everybody agree with this much? Ron _______________________________________________ lisp mailing list [email protected] https://www.ietf.org/mailman/listinfo/lisp
