EVPN E-Tree

The EVPN E-Tree feature implements E-Tree service as defined by the Metro Ethernet Forum (MEF) in draft-sajassi-l2vpn-evpn-etree-03. The E-Tree service is a rooted-multipoint service that is supported only with EVPN over MPLS in the core. In an EVPN E-Tree service, each circuit attached to the service is either a root or a leaf. The service adheres to the following forwarding rules: 

• A leaf can send or receive traffic only from a root. 
• A root can send traffic to another root or any of the leaves. 
• A leaf or root can be connected to provider edge (PE) devices in single homing mode or multihoming mode.