The Attachable Access Entity Profile (AAEP or AEP for short) is a construct of the ACI fabric that joins separate entity types. It is a critical policy object with associating a given domain type and VLAN pool with interface policy that will be used within tenant space.

Step 1 - Navigate to AEP

You will navigate to and create three (3) different AEP as a best practice to have a different AEP per domain.

To create an AEP, naviage to Attachable Access Entity Profiles:

1. Click Fabric
2. Click Access Policies
3. Expand Policies by clicking the toggle arrow (>)
4. Expand Global by clicking the toggle arrow (>)
5. Right-click on Attachable Access Entity Profiles
6. Click Create Attachable Access Entity Profile

Step 2 - Create AEP for Physical Domain

Create an AEP for your Physical / Layer 2 Domain that will associate to your Layer 2 interfaces.

In the Create AEP popup:

1. Name the AEP: aci_p21_l2_aep
2. Click the plus button (+) to add an Domain
3. In the Domain Profile dropdown, select your Physical Domain created in the previous section: aci_p21_physdom
4. Click Update
5. Click Next

You have not created the interface policy to associate this AEP yet, so you're going to skip Step 2 and just click Finish.

Step 3 - Create AEP for Layer 3 Domain

Create another AEP for your Layer 3 Domain that will associate to your point-to-point Layer 3 interfaces.

In the AEP Domain popup:

1. Name the AEP: aci_p21_l3_aep
2. Click the plus button (+) to add an Domain
3. In the Domain Profile dropdown, select your Layer 3 Domain created in the previous section: aci_p21_extrtdom (L3)
4. Click Update
5. Click Next

You have not created the interface policy to associate this AEP yet, so you're going to skip Step 2 and just click Finish.

Step 4 - Create AEP for VMM integration

Create your last AEP for your VMM Domain that will created in the VMM section of the lab. You will associate this AEP to your interfaces connected to your VMWare ESXi host for this lab in the next section.

In the Create AEP popup:

1. Name the AEP: aci_p21_vmm_aep
2. The VMM Domain does not exist yet, so click Next

You have not created the interface policy to associate this AEP yet, so you're going to skip Step 2 and just click Finish.

First verify your work and then continue to the next section to create your Interface Policies for the ports assigned to you and your tenant for this lab.