Okay, probably a simple question for a lot, but my experience has been more along the lines of many offices, with a typical setup of a border router (cisco, firewall (watchguard, new cisco ASA's, Windows 2003 server DC, exchange server, etc....) I have been doing this a while now and have been working with everything, but one piece has not had to be done, but I see it coming. My typical 192.168.40.X/24 192.168.30.x/24, etc have always been good, with offering up enough IP's through DHCP. Now we are going to be expanding to some new office space and I am trying to plan how everything will work nicely. Like I said I have been working with this stuff for a while, but haven't seen this explained in a real way scenerio. I have read the CCNA book and many others, but haven't really found what I am looking for. I am just trying to get a good picture either by being pointed in the right direction (link, book) or by someone explaining it in a straight facts way.
We currently have about 10 offices all connected together and everything is working good. I just need a to the point lesson in how this part works in regard to networking. Ideally I would like everyone even if on different networks, but within the same building to be no different then if it was just one network inside the building. For example, say floor 1 is on the 192.168.1.x network and the 2nd floor is 192.168.2.x. I'd like this to work, but does that also mean I now need to deal with Ipsec tunnels between the other offices an this new network?
Thanks for any help.