I have 9 remote offices, all on subnets (literally 10.20.1.x, 10.20.2.x, and so on). Each office has a router. I am trying to understand how these subnets are set up. I have a router and test computer in my office and would like to set up another subnet in my office for practice. I believe all the subnets are created and configured in my Netscreen 25 device. This is certainly a newby question, but I'm responsible for each of these offices and I would like to know how the system is set up before anything goes wrong and I need to fix it. Secondarily, if anyone knows of introductory material I can read on configuring subnets on Netscreen 25, I would appreciate it.