Adding a network¶

Creating the required network elements¶

We need to create a router and network/subnet.

Navigate to the “Routers” section and click “Create Router”:

For this example we will name our router “border-router”, this is an arbitrary name, you could use whatever you would like. Then select the admin state check-box and select “public-net” as the external network:

Navigate to the “Networks” section and click “Create Network”:

We will name our network “private-net”, we will choose this name so that we do not confuse it with the “public-net”. You should also select create subnet and click “Next”:

Name your subnet “private-subnet”. Here you can either select a network address you would want to use for your subnet, you can allow one to be assigned for you, or you can disable the gateway all together. For this tutorial we will apply a simple address and click “Next”:

The Subnet Details page is normally, by default, empty. However you can define the different fields however you’d like. Specifications like:

• enabling DHCP

  • Dynamic Host Configuration Protocol. Allows you to assign IPs dynamically to devices on your network.

• defining a DHCP ip address allocation pool.

  • This is the range of IPs that you are going to be allocating. For example from 10.0.0.10 to 10.0.0.200

• specifying the DNS Name Servers for the required region

At the moment if you leave the DNS field blank the dashboard will automatically allocate it to the catalyst cloud DNS. So it is entirely optional.

Click on the router name in the router list:

Select the “Interfaces” tab and click “+Add Interface”:

Select the correct subnet:

You should now have a network topology that looks like this:

Following the configuration details this tutorial has advised, you should now have a network called private_network that connects to your border-router and then on to the wider internet. This network can then be used to host instances which will then be able to connect to the outside internet through this connection.