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OpenStack Networking Cookbook by Chandan Dutta Chowdhury, Sriram Subramanian

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Creating a Flat Network using Horizon

In the case of a VLAN network type, we saw that the physical interface was separated in logical interfaces such as eth1.1002, eth1.1003, and so on. Moreover, each of these logical interfaces was placed on a Linux bridge corresponding to the OpenStack network.

In contrast, Flat Networks are created by placing the physical interfaces directly on the Linux bridge. This means that you can have only one Flat Network per physical interface on the compute node. Due to this reason, only the users with an administrative role are allowed to create a Flat Network.

Getting ready

In order to create a Flat Network and Subnet, you will need the following information, minimally:

  • The Network name
  • The Subnet name and IP address ...

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