Reading the article what occurs to me is: IPv4 requires a certain amount of administrative personnel overhead. It's relatively low which is certainly one reason for the success of IPv4. People are expensive so any new, pervasive technology will be judged at least in part on its personnel requirements. I'd go so far as to say that administering large IPv4 networks grows in personnel roughly as the log of the number of nodes. If what this is telling us, or warning us, is that IPv6 networks require higher personnel costs then that could become a big issue. Particularly among management where they've become used to a few to several people in a team running the heart of quite large networks. What if IPv6 deployment doubles or triples that personnel requirement for the same quality of administration? Does anyone know of any studies along these lines? My guess is that there isn't enough data yet. -- -Barry Shein The World | bzs@TheWorld.com | http://www.TheWorld.com Purveyors to the Trade | Voice: 800-THE-WRLD | Dial-Up: US, PR, Canada Software Tool & Die | Public Access Internet | SINCE 1989 *oo*