Figure 1: EVPN VXLAN External Connectivity Through a Border Leaf Switch Connectivity Through a Border Spine Switch Deploying spine switches as border nodes provides the advantage of optimizing the north-south communication with external resources. At the same time, border spine deployment allows the spine switches to support VXLAN control and data plane functionality. Border spine switches allow both north-south communication and east-west communication. East-west communication represents the communication within the nodes of the EVPN VXLAN network. The following figure shows border spine external connectivity of an EVPN VXLAN network with external Layer 2 and Layer 3 networks.:
Configuring EVPN VXLAN External Connectivity Implementation of Border Nodes for EVPN VXLAN External Connectivity Configuring EVPN VXLAN External Connectivity 3