EVPN is an IETF technology per RFC 7432, BGP MPLS-Based Ethernet VPN, that uses a new BGP address family and allows VPLS services to be operated as IP-VPNs, where the MAC addresses and the information to set up the flooding trees are distributed by BGP.
EVPN is defined to fill the gaps of other L2VPN technologies such as VPLS. The main objective of the EVPN is to build E-LAN services in a similar way to RFC 4364 IP-VPNs, while supporting MAC learning within the control plane (distributed by MP-BGP), efficient multi-destination traffic delivery, and active-active multi-homing.
EVPN can be used as the control plane for different data plane encapsulations. The Nokia implementation supports the following data planes:
EVPN for VXLAN overlay tunnels (EVPN-VXLAN)
EVPN for VXLAN overlay tunnels (EVPN-VXLAN), being the Data Center Gateway (DGW) function the main application for this feature. In such application VXLAN is expected within the Data Center and VPLS SDP bindings or SAPs are expected for the connectivity to the WAN. R-VPLS and VPRN connectivity to the WAN is also supported.
The EVPN-VXLAN functionality is standardized in RFC 8365.
EVPN for MPLS tunnels (EVPN-MPLS)
EVPN for MPLS tunnels (EVPN-MPLS), where PEs are connected by any type of MPLS tunnel. EVPN-MPLS is generally used as an evolution for VPLS services in the WAN, being Data Center Interconnect one of the main applications.
The EVPN-MPLS functionality is standardized in RFC 7432.
EVPN for PBB over MPLS tunnels (PBB-EVPN)
PEs are connected by PBB over MPLS tunnels in this data plane. It is usually used for large scale E-LAN and E-Line services in the WAN.
The PBB-EVPN functionality is standardized in RFC 7623.
The 7750 SR, 7450 ESS, or 7950 XRS EVPN VXLAN implementation is integrated in the Nuage Data Center architecture, where the router serves as the DGW.
For more information about the Nuage Networks architecture and products, see the Nuage Networks Virtualized Service Platform Guide. The following sections describe the applications supported by EVPN in the 7750 SR, 7450 ESS, or 7950 XRS implementation.