Network Setup For CCTV Systems

by The Low Voltage Experts


Posted on June 13, 2019


Network Setup For CCTV Systems

In this article we are going to talk about how to setup the network after installing the NVR and IP cameras. We will explain IP addresses, default gateway, DHCP and static IP addresses.

Locating Your IP Address Range

Connect a laptop to the same router your NVR (Network Video Recorder) is connected to. You can connect via LAN or Wifi. Open up Windows Command Prompt. Type in ipconfig. The program will output something similar to the image above. Take note of the IPv4 address, the subnet mask and the default gateway. These we will need later.

DHCP Setup

Using DHCP is the easiest way to setup your CCTV network. DHCP stands for Dynamic Host Configuration Protocol. To do the next steps you will need to plug a monitor and a mouse into the NVR. Login directy into the NVR. Go to your NVR's network menu and look for DHCP or Enable DHCP. This will automatically acquire all the network information from your router pending that its got DHCP setup already. Most routers already have DHCP already configured. DHCP is sufficient for small scale system however for larger system we recommend you use static IP addressing. This will make it easier to configure larger networks, assign IP addresses to cameras, remote viewing, setting up remote terminals and VLAN setup.

Static IP Addresses

To give your NVR a static IP it is first recommended to scan your network and see what IPs are being used already to void having a IP conflict. (An IP conflict occur when two or more network devices in the same network system have been given the same IP address.)

To scan your network download and install Advanced Port Scanner. Once it is installed, run the program and you will see the following screen.

Screen shot of advanced port scanner software

From the top toolbar click on the blue IP Icon. This will automatically set your IP scanning ranges. Then click Scan. Once it's finished scanning it will list all active IP address on your current network.

Screen shot of advanced port scanner software with results

As you can see in the above screenshot the IP Scanner has located and listed all the active IP addresses. Choose an IP that isn't being used. (It is best to reserve this IP address from your router. This ensures that the router will always keep it aside for the NVR. For more in depth info on router configuration check out our article on Home Router Configuration.

Now let's assign it to the NVR. Login directly into the NVR. Go to your NVR's network menu and look for the IPv4 address section. Type in the IP you choose from the IP Scanner. Fill in the subnet mask and the default gateway with the information we retrieved from the Command Console earlier. Usually on the NVR's network menu you will see the mac address of the NVR. Take note of it for later. Apply or Save. Now we have assigned a static IP to the NVR.

Let's test it. Open up the Command Console again on your laptop. Type in ping 192.168.xxx.xxx where 192.168.xxx.xxx will be the IP address you assigned to the NVR. If everything was setup successfully you should see the ping results as per image below.

Screen shot of command-prompt-ping-test

Now open up a your web browser and type in the NVR's IP in the address bar. The NVR's login screen will come up. You can now view your CCTV system from your laptop. Now that your internal CCTV network is setup check out our guide on How To setup CCTV Remote Viewing.


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