I strongly suggest putting some network numbers aside for this purpose. Hans-Werner
We have recently received a number of requests from customers wanting IP network numbers which are never intended to be routed to the global Internet. How are other providers dealing with requests of this sort? In the absence of network numbers which have been explicitly set aside for this purpose by the global Internet registry, I can't see a good way for a provider to allocate network numbers for this purpose without having them needlessly consume the provider's address space. One compromise might be for the provider to reserve a block which can re-used by more than one customer, but that block will still consume a chunk of the provider's space. Also, how large should that block be to satisfy all requests for non-connected network numbers?
Your comments on this matter would be appreciated.
--Vince