On Jan 24, 2007, at 4:58 AM, Mark Smith wrote:
The problem is that you can't be sure that if you use RFC1918 today you won't be bitten by it's non-uniqueness property in the future. When you're asked to diagnose a fault with a device with the IP address 192.168.1.1, and you've got an unknown number of candidate devices using that address, you really start to see the value in having world wide unique, but not necessarily publically visible addressing.
That's what I meant by the 'as long as one is sure one isn't buying trouble down the road' part. Having encountered problems with overlapping address space many times in the past, I'm quite aware of the pain, thanks. ;> RFC1918 was created for a reason, and it is used (and misused, we all understand that) today by many network operators for a reason. It is up to the architects and operators of networks to determine whether or not they should make use of globally-unique addresses or RFC1918 addresses on a case-by-case basis; making use of RFC1918 addressing is not an inherently stupid course of action, its appropriateness in any given situation is entirely subjective. ----------------------------------------------------------------------- Roland Dobbins <rdobbins@cisco.com> // 408.527.6376 voice Technology is legislation. -- Karl Schroeder