It's much easier and nicer to use globally unique addressing if you've got it than to set up multiple NAT's just to allow different sites to re-use the same pri

It's much easier and nicer to use globally unique addressing if you've got it than to set up multiple NAT's just to allow different sites to re-use the same private IP space. I worked at an ISP in a previous job where we ran out of RFC1918 space, and were squatting on UK MoD/DoD/other IP space for internal traffic because we simply had no more IP's to assign within RFC1918. It was a bad situation when one of those ranges we were squatting on suddenly became used and customers were unable to reach certain services...