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.

• ✗

  VXLAN with static unicast flooding and no control plane

  Why it's wrong here

  Static unicast flooding requires manual configuration of remote VTEPs and does not provide automatic discovery or multihoming capabilities. It is a simple but unscalable method that lacks the dynamic control plane needed for all-active multihoming. This approach would not meet the requirement for automatic VTEP discovery and multihoming.

• ✗

  VXLAN with PIM-SM multicast underlay

  Why it's wrong here

  Using PIM-SM for the underlay allows multicast replication for broadcast, unknown unicast, and multicast (BUM) traffic, but it does not provide a control plane for VTEP discovery or multihoming. It relies on data plane learning and does not support all-active multihoming. Therefore, it does not meet the requirement for EVPN-like multihoming and control plane functionality.

• ✗

  VXLAN with OSPF as the underlay routing protocol

  Why it's wrong here

  OSPF is an underlay routing protocol that provides IP reachability between VTEPs, but it does not serve as a VXLAN control plane. It does not distribute MAC addresses or support multihoming with all-active forwarding. While OSPF is often used in the underlay, it does not fulfill the need for VTEP discovery or EVPN multihoming.

• ✓

  VXLAN with EVPN as the control plane

  Why this is correct

  EVPN provides a standards-based control plane for VXLAN, enabling automatic VTEP discovery, MAC address learning, and support for multihoming with all-active forwarding. EVPN uses BGP to distribute MAC and IP reachability information, and it supports Ethernet Segment (ES) multihoming, which allows a host to connect to multiple VTEPs with all links active. This matches the requirements for dynamic discovery and all-active multihoming.