Solved Class B of subnet in a campus

February 16, 2013 at 03:49:18
Specs: Windows XP
I want to use a sub net of on a IP CCTV system in a campus environment. I have 2 main computers, 6 servers with EitherWan POE switches, and 84 IP cameras divided among the 6 building servers (NVR's) in the campus. I would like to setup the network as follows.
Main PC's and 11
Server (NVR's) Bldg's 2-7 thru the 3rd will octet depict the
bldg reference number.
IP cameras for Bldg 2-7 again using the 3rd octet to depict
the building number and match the server.
These are just dumb 24 port POE switches and each building switch will be sent back to the main switch at the PC's for connection. Will I be able to communicate to all the servers and view all the camera's at each PC with this network scheme ?

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February 16, 2013 at 09:11:34
✔ Best Answer will give you the following network:

Start IP:
End IP:

If your network is bridged across all included buildings this would work just fine.

I'm not sure I'm grasping your IP scheme though. Assuming youre two main PC's are located in building 1 and the other 6 servers (one each) in the other buildings and then multiple cameras in building as well. I think I would do something like the following for myself.

Building one (main bldg or central bldg)

Building two
IP cameras:, 11, and so on for each camera in the building

Building three:
IP Cameras:, 11, etc

This way the 3'd octed would more accurately reflect each building location of both server and cameras. Since you have 254 IP's to work with per 3'd octed number, why not take full advantage of that. Of course you're going to document the heck out of your setup but this is how I would do it just to keep straight what's where with regard to building and IP scheme.

Since our default gateway (assuming you bridge this network throughout all buildings) is going to be, there's no reason not to use .1 as the server IP in each building.

Oh, since it's just the 6 buildings, I think if it were me, I'd use instead of /16 That still gives you the required networks in the 3'd octet (ie: 0 through 7) to work with and you could always expand later by moving to /20 if you needed to. You don't really need a network with 65,000+ available IP :)

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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