Introduction “Layer 2 Spine-Leaf” is a great architecture for most small data centers. If the data center only has a few racks of equipment, it’s often unnecessary to build a more complex design. In its most basic deployment, all gateways are SVIs (VLAN interfaces) on the spines. Multi-tenancy can be achieved by using VRF-lite and putting a firewall in to stitch the VRFs together. This is part of a series of building data center fabrics with different network operating systems.