Authored pair
Single-fabric EVPN-VXLAN teaching vs how sites interconnect across a DCI boundary.
network · deep · draft
An L3 Clos underlay with EVPN as the BGP control plane and VXLAN as the NVO data plane — multi-tenant L2/L3 segments, distributed IRB, and scalable MAC/IP learning without STP-stretched VLANs.
Problem. Pure IP Clos moves packets well but does not by itself provide multi-tenant L2 segments, flexible subnet placement, or scalable MAC learning across a large fabric.
network · deep · draft
Independent POD or DC fabrics interconnected with selective EVPN/VXLAN stitching at interconnect gateways, plus distributed anycast first-hop gateways — without building one giant flat L2 domain.
Problem. Separate fabrics need selective L2 stretch and/or L3 connectivity for mobility and active-active apps without full-mesh VTEP flooding between every leaf in every site or unprotected long-haul VLAN stretch.