CCNP Infrastructure Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  It provides a routing underlay for the VXLAN tunnels by advertising VTEP loopback addresses.

  Why it's wrong here

  Advertising VTEP loopback addresses is typically done in the underlay routing protocol, such as OSPF or BGP, not in the BGP EVPN address family. The EVPN address family is for overlay control plane, not for underlay reachability. The underlay must already provide IP reachability between VTEPs.

• ✗

  It synchronizes the MAC address tables of all VTEPs by flooding unknown unicast traffic.

  Why it's wrong here

  BGP EVPN does not synchronize MAC address tables via flooding. Instead, it distributes MAC addresses as EVPN routes, which populates the MAC address tables without data plane flooding. Flooding unknown unicast is a traditional VXLAN behavior without EVPN, but EVPN eliminates it by providing control plane learning.

• ✗

  It encapsulates the original Ethernet frames into VXLAN packets and forwards them across the underlay.

  Why it's wrong here

  Encapsulation of Ethernet frames into VXLAN packets is done by the data plane, not by BGP EVPN. BGP EVPN is a control plane protocol that distributes reachability information. The actual encapsulation and forwarding are performed by the VTEP based on the information learned from BGP EVPN.

• ✓

  It distributes MAC and IP address reachability information for hosts and enables VTEP peer discovery.

  Why this is correct

  The BGP EVPN address family carries MAC and IP address reachability information in the form of EVPN routes, such as Type 2 and Type 5 routes. This allows VTEPs to learn about remote hosts and VTEPs, facilitating the creation of VXLAN tunnels and enabling efficient forwarding without flooding.