CCNP Virtualization 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.

• ✓

  interface nve1 source-interface loopback1

  Why this is correct

  The 'source-interface loopback1' command under the NVE interface configuration sets Loopback1 as the source for all VXLAN encapsulated traffic. Since Loopback1 is also used for BGP EVPN peering, this ensures consistent reachability and avoids asymmetric routing. This is the correct way to bind the VTEP source to a specific loopback, which is a common best practice in VXLAN EVPN deployments.

• ✗

  interface loopback1 vxlan source-interface

  Why it's wrong here

  This command is not valid Cisco NX-OS syntax. VXLAN source interface configuration is done under the NVE interface, not under the loopback interface. Attempting to configure it on the loopback would result in an error, and the VTEP would not have a designated source address, preventing VXLAN tunnels from being established.

• ✗

  interface nve1 source-interface loopback0

  Why it's wrong here

  While Loopback0 could be used, the scenario specifies that the loopback used for BGP EVPN peering is Loopback1. Using Loopback0 would separate the VTEP source from the control-plane peering address, potentially causing suboptimal forwarding or requiring additional routing configuration. The question asks for the interface that is also used for BGP EVPN peering, so Loopback1 is the correct choice.

• ✗

  feature nv overlay source-interface loopback1

  Why it's wrong here

  The 'feature nv overlay' command is used to enable the NVE feature globally, but it does not accept a source-interface parameter. The source interface must be configured under the NVE interface itself. Placing it under the global feature command is syntactically invalid and would not configure the VTEP source correctly.