I am building a windows based network for my 'medium sized' business and I am only used to linux/mac networks. Any help is greatly appreciated! :)
This is the setup I have:
T1 from at&t, and a fancy router from them. We are using their IP-flex service and will also attach an avaya ip office for my phones... later. A few different Windows servers, everything is 2008R2, but really my questions revolve only around one of these units which is active directory - domain controller, dns, and dhcp server. I have a couple of fully managed dell switches, and a Juniper ssg5 for vpn to connect to our one other location and for road warriors.
This is where I am now:
We have a single static IP from at&t from their router they setup, and I am primarily confused about the network structure. I originally connected the router to the switch, and configured it with the static IP, subnetmask, and dns provided by at&t. I thought that the switch would have that as an external address and I could assign it a static internal ip, kinda like a router, but I don't think that's how a switch like this works so I tried something else.
Currently I have connected the router to my domain controller/dhcp/dns server via en1 with the static info from at&t. Then on en0 I have it statically set to a 172.16.. and connected that to the switch, and assigned the switch another 172.16.. ... this seems to be nearly right, I have connected a client to the switch and it has joined the domain successfully and received a dhcp address and configuration information. However, while it connects to the local network, it cannot reach the internet. I believe it will not because of the default gateway information, I've tried to set it to the routers static IP, server's 2 static IPs, and the switch's IP via the Scope Options within the dhcp server but nothing seems to work, the configuration is updated everytime.
I am starting to believe I need to first connect the at&t router to the juniper, and then connect the juniper to my domain controller while keeping the switch connected to the other ethernet port on that server or connect the switch to the juniper. Does this make sense?
Again thank you so much for any suggestions! :) I am happy to answer any questions you may have for me as well!