I guess it might depend on the general profile of your customers' requirements, but I'd imagine that non-contiguous blocks will be far more efficient in the long run, with the added benefit of no need for customers to pursue a renumbering plan every N years which should nearly always be avoided in any case imho. Obviously, the smaller the average block size the less efficient it becomes. If the customers are honest in their expected future ip address requirements it shouldn't be that often that they'll need more address space in any case. Aidan 2009/1/14 Frank Bulk <frnkblk@iname.com>:

Secondary IPs, additional documentation and confusion, and less efficient use of address space, are just a few negatives of assigning more netblocks.

Frank

-----Original Message----- From: Aidan Whyte [mailto:aidanwhyte@gmail.com] Sent: Wednesday, January 14, 2009 10:35 AM To: frnkblk@iname.com Subject: Re: Approach to allocating netblocks

Perhaps I'm missing something, but I've never seen much of a problem with non-contiguous blocks for customer address space expansion..