VXLAN EVPN ESI multi-homing on Nexus 9000
For years, multi-homing in VXLAN BGP/EVPN fabrics with Cisco Nexus switches meant one thing: vPC. It works very well; two-switch redundancy, familiar operational model, no need to deeply understand EVPN’s native multi-homing details. At the same time, vPC has always carried operational overhead: peer-links, keepalive link, the potential peer-link bandwidth limitation, and the hard ceiling of two switches. With NX-OS 10.6(1), Cisco finally brings full native VXLAN EVPN ESI multi-homing on Nexus 9000!
This post digs into what that means and how it works.