JN0-649 Sample Questions Answers

Cisco explains it better: The EVPN control plane advertises the following types of information:

Route type 1 – This is an Ethernet Auto-Discovery (EAD) route type used to advertise Ethernet segment identifier, Ethernet Tag ID, and EVPN instance information. EAD route advertisements may be sent for each EVPN instance or for each Ethernet segment.

Route type 2 – This advertises endpoint reachability information, including MAC and IP addresses of the endpoints or VTEPs.

Route type 3 – This performs multicast router advertisement, announcing the capability and intention to use ingress replication for specific VNIs.

Route type 4 – This is an Ethernet Segment route used to advertise the Ethernet segment identifier, IP address length, and the originating router's IP address.

Route type 5 – This is an IP prefix route used to advertise internal IP subnet and externally learned routes to a VXLAN network.

Type 2 route, MAC with IP advertisement route—Type 2 routes are per-VLAN routes, so only PEs that are part of a VNI need these routes. EVPN allows an end host’s IP and MAC addresses to be advertised within the EVPN Network Layer reachability information (NLRI). This allows for control plane learning of ESI MAC addresses. Because there are many Type 2 routes, a separate route-target auto-derived per VNI helps to confine their propagation. This route type is supported by all EVPN switches and routers. Type 5 route, IP prefix Route—An IP prefix route provides encoding for inter-subnet forwarding. In the control plane, EVPN Type 5 routes are used to advertise IP prefixes for inter-subnet connectivity across data centers. To reach a tenant using connectivity provided by the EVPN Type 5 IP prefix route, data packets are sent as Layer 2 Ethernet frames encapsulated in the VXLAN header over the IP network across the data centers.