This page is designed to assist in the installation of OpenStack with ACI OpFlex. Each section will contain snippets of code that are designed to be copy and pasted into your system. The easiest way to interact with the tool is to use the COPY button on each section ( top right ). This will copy those contents to the clipboard for you to paste into the terminal of the server.

Also included is a form with basic information that you can fill and the tool will then generate the documentation with those values filled in the proper location.

The following diagram should assist you in understanding the different values that will be required to configure the OpFlex ACI plugins.

The concept of the external Layer 3 is how in ACI external routed domains are associated to fabric tenants. The OpFlex plugin takes over the complexity of this configuration in ACI by defining the policy based on the configuration specifications defined. OpenStack defines the policy via static routes only, but can be adjusted in such a way that you can configure the policies for more complex routing protocols by hand ( discussed further ).

In the ACI fabric, traffic is sent and received using VXLAN. There are two separate layers of connectivity, what is know as the Outer IP and the Inner IP. This is due to the VXLAN encapsulation. Traffic that is received in the Leaf is terminated in the leaf and re-encapsulated into the fabric. This is known in ACI as normalization. Traffic that is received from a virtual leaf ( in this case the OpFlex agent or also in VMware AVS integration ) establishes a connection between the agent on the host and the agent on the physical ACI leaf. The outer IP address is sent to what is known as the VTEP. The inner IP address is known as the FTEP and programed into each agent.

For this reason every physical ACI leaf is going to be assigned the same default gateway and FTEP address as it's locally significant. The infra default Bridge Domain gateway can be extracted from the ACI GUI by looking under the default BD of the INFRA tenant.

For the FTEP address you can easily connect to a leaf node in the ACI network and issue the command show ip interface brief and the IP address of the interface lo1023 will be the IP address of the FTEP.