Seamless EVPN-VXLAN Tunnel Stitching for Data Centers

This guide provides a comprehensive examination of seamless EVPN-VXLAN tunnel stitching techniques for data center interconnections. It outlines various options for data center interconnect (DCI) and emphasizes the flexibility of the EVPN control plane, which has evolved significantly in recent years. The document details the use of EVPN-VXLAN in both greenfield and brownfield scenarios, highlighting its application in stitching VXLAN-to-VXLAN and VXLAN-to-MPLS connections. The authors present six different DCI options, focusing on the advantages of EVPN-VXLAN for Layer 2 bridging and Layer 3 IP prefix advertisement. Additionally, the guide discusses the importance of Group Based Policy (GBP) profiles for micro-segmentation across data center sites. The document serves as a resource for network architects, engineers, and operators, providing step-by-step instructions for configuring and verifying EVPN-VXLAN fabrics and DCI operations. It aims to facilitate understanding of new DCI overlay options and advanced EVPN topics relevant to fabric deployment.