This article goes over interface provisioning for ACI.
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Define and create policies such as CDP, LLDP, Netflow, or 802.1x policies. These can be later attached to an interface. This can be done under Fabric -> Access Policies -> Policies -> Interface

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Now, with the created Interface Policies you can now create you Policy Groups. These are used to create configs such as vPC's and PC's This can be done under Fabric -> Access Policies -> Interface -> Leaf Interfaces -> Policy Group

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Now, These created Policies you can now create you can map them to interfaces on the Leaf's. This can be done under Fabric -> Access Policies -> Switches -> Leaf Interfaces -> Profile. Once the Profiles are created then apply it to Fabric -> Access Policies -> Switches -> Leaf Switches -> Profiles

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Once the polices have been applied you can verify the interface status from under the following path. Fabric -> Inventory -> Pod # -> Leaf # -> Interfaces -> PC Interfaces or vPC Interfaces.
