Gordon, There are lots of reasons a provider might aggregate networks for their customers. One is that many customers are not able to run routing protocols that do aggregation (customers that are not running routing protocols and use a static default is one example). In fact, in this case Sprint ought be doing aggregation for such customers (and I am sure they are). In any case, MCI's policy is not unique. Many providers do this. -- Stan | Academ Consulting Services |internet: sob@academ.com Olan | For more info on academ, see this |uucp: {mcsun|amdahl}!academ!sob Barber | URL- http://www.academ.com/academ |Opinions expressed are only mine.