On May 2, 2007, at 2:08 PM, Durand, Alain wrote: > I disagree... Any system today is expected to be able to use > RFC1918. This is not the case for 240/4. True. I meant RFC1918 in the sense that it would never be globally routed. As Tony points out, this would be private addressing for a limited set of devices (those that didn't treat class E specially). Rgds, -drc