CCNP Virtualization Practice Question
A network engineer is troubleshooting a Cisco Nexus 9000 switch configured with VXLAN EVPN. The engineer notices that the switch is not advertising EVPN routes for a specific VNI. The NVE interface is up, and the VNI is configured. Which action should the engineer take to verify that the VNI is properly associated with the EVPN control plane?
⚠ Common exam trap
The trap here is focusing on NVE interface or VNI status commands, which show data plane information, rather than checking the BGP EVPN table, which is the control plane for EVPN route advertisement.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check the output of 'show bgp l2vpn evpn' to see if the VNI is advertised in the EVPN address family.
To verify that a VNI is properly associated with the EVPN control plane, the engineer should check the BGP EVPN table using 'show bgp l2vpn evpn'. This command displays EVPN routes, including those for the VNI. If the VNI is not advertised, it indicates a configuration issue in the EVPN address family or BGP. Other commands like 'show nve vni' or 'show interface nve1' do not directly show EVPN route advertisement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Check the output of 'show bgp l2vpn evpn' to see if the VNI is advertised in the EVPN address family.
Why this is correct
The 'show bgp l2vpn evpn' command displays the EVPN routes in the BGP table, including Type-2 and Type-3 routes for MAC and IMET. By checking this output, the engineer can verify whether the VNI is being advertised. If the VNI is not present, it indicates a configuration issue with the EVPN control plane, such as missing VNI configuration under the EVPN address family or BGP neighbor issues.
- ✗
Check the output of 'show vlan id 10' to see if VLAN 10 is active and mapped to the VNI.
Why it's wrong here
The 'show vlan id 10' command displays VLAN information, such as ports and status, but it does not show VNI mapping or EVPN route advertisement. While VLAN-to-VNI mapping is necessary for VXLAN, this command does not verify EVPN control plane operations. The engineer should focus on EVPN-specific commands to troubleshoot route advertisement.
- ✗
Check the output of 'show interface nve1' to verify that the NVE interface is operational.
Why it's wrong here
The 'show interface nve1' command provides status and statistics for the NVE interface, such as whether it is up and the source IP address. However, it does not show EVPN route advertisement or VNI-to-EVPN association. While it is useful for verifying the NVE interface state, it does not address the specific issue of EVPN route advertisement for a VNI.
- ✗
Check the output of 'show nve vni' to see if the VNI is up and associated with the NVE interface.
Why it's wrong here
The 'show nve vni' command displays the status of VNIs and their mapping to VLANs, but it does not directly show EVPN route advertisement. While it can confirm that the VNI is up, it does not verify the EVPN control plane association. The engineer needs to check EVPN route advertisement specifically, so this command alone is insufficient.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
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