Published by Ryan Tischer,
^^^- -Get it? Fabric Softener… ^^^
MP-BGP EVPN is a control protocol for VXLAN based on industry standards. Prior to EVPN, VXLAN overlay networks operated in the flood-and-learn mode. In this mode, end-host information learning and VTEP discovery are both data plane driven, with no control protocol to distribute end-host reachability information among VTEPs. MP-BGP EVPN changes this model. It introduces control-plane learning for end hosts behind remote VTEPs. It provides control-plane and data-plane separation and a unified control plane for both Layer-2 and Layer-3 forwarding in a VXLAN overlay network.
The MP-BGP EVPN control plane offers the following main benefits:
The MP-BGP EVPN protocol is based on industry standards, allowing multivendor interoperability.
- It enables control-plane learning of end-host Layer-2 and Layer-3 reachability information, enabling organizations to build more robust and scalable VXLAN overlay networks.
- It uses the decade-old MP-BGP VPN technology to support scalable multitenant VXLAN overlay networks.
- The EVPN address family carries both Layer-2 and Layer-3 reachability information, thus providing integrated bridging and routing in VXLAN overlay networks.
- It minimizes network flooding through protocol-based host MAC/IP route distribution and Address Resolution Protocol (ARP) suppression on the local VTEPs.
- It provides optimal forwarding for east-west and north-south traffic and supports workload mobility with the distributed anycast function.
- It provides VTEP peer discovery and authentication, mitigating the risk of rogue VTEPs in the VXLAN overlay network. - It provides mechanisms for building active-active multihoming at Layer-2.