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How to create a public network ext_net, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

Although the external network is an existing network, we still need to define the objects of the external network in the Neutron so that router knows how to connect the tenant network to the external network.

The editor will create an ext_net through UI.

Go to the Admin-> Networks menu and click the "Create Network" button.

Displays the creation page.

Provider Network Type select "Flat" Physical Network and fill in "external", which is consistent with the setting of the flat_networks parameter in ml2_conf.ini. Check the External Network selection box. Click "Create Network" and ext_net is created successfully.

Click the ext_net link to go to the network configuration page. There is no subnet yet. Click the "Create Subnet" button.

Create a subnet_10_10_10_0,IP address of 10.10.10.Universe 24.

Here we use the default address of 10.10.10.1 for Gateway. Usually we need to ask the network administrator about the Gateway IP of the extranet subnet, and then fill in here.

Click "Next".

Because we do not directly assign public network IP to instance, we generally do not need enable DHCP.

Click "Create".

The subnet is created successfully, and the gateway is 10.10.10.1.

Let's take a look at the changes in the network structure of the control node and execute brctl show

A bridge brqe496d3d2-53 has been added and the physical network card eth3 has been connected to the bridge.

After reading the above, have you mastered the method of how to create a public network ext_net? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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