350-401 Virtualization Practice Question
A network engineer is troubleshooting a Cisco Nexus 9000 leaf switch that is part of a VXLAN EVPN fabric. The engineer notices that the leaf is not learning remote MAC addresses, although the underlay is operational and BGP EVPN sessions are established. Which action should the engineer take to verify that the leaf is receiving EVPN Type 2 routes?
⚠ Common exam trap
The trap here is assuming that seeing NVE peers or underlay routes is sufficient to confirm MAC learning, when actually you need to inspect the BGP EVPN table for Type 2 routes.
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' on the leaf.
To verify that the leaf is receiving EVPN Type 2 routes, you must examine the BGP EVPN table. The command 'show bgp l2vpn evpn' displays all EVPN routes, including Type 2 MAC/IP advertisement routes. If these routes are missing, the leaf will not learn remote MAC addresses. Other commands like 'show nve peers' show VTEP peers but not MAC routes, and 'show vxlan interface' shows tunnel configuration, not routes.
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 vxlan interface' on the leaf.
Why it's wrong here
'show vxlan interface' provides information about the VXLAN tunnel interface, such as the source interface and VNI mappings. It does not display EVPN routes. While it can confirm that VXLAN is configured, it will not show whether Type 2 routes are being received. This command is useful for verifying VTEP configuration but not for EVPN route learning.
- ✗
Check the output of 'show ip route' on the leaf.
Why it's wrong here
'show ip route' displays the underlay IP routing table, which confirms reachability to remote VTEP loopbacks. It does not show EVPN routes or MAC address information. While underlay reachability is necessary, it does not verify that the leaf is receiving Type 2 routes. This command is irrelevant to EVPN route verification.
- ✗
Check the output of 'show nve peers' on the leaf.
Why it's wrong here
'show nve peers' displays the remote VTEP peers learned through the control plane. It shows the IP addresses of remote VTEPs and the VNIs associated with them. However, it does not show the specific EVPN routes (Type 2) that carry MAC addresses. If NVE peers are present, it indicates that Type 3 routes are learned, but not necessarily Type 2. This command is not the best to verify Type 2 routes.
- ✓
Check the output of 'show bgp l2vpn evpn' on the leaf.
Why this is correct
The command 'show bgp l2vpn evpn' displays the EVPN routes received from BGP peers, including Type 2 (MAC/IP advertisement) routes. If the leaf is not learning remote MACs, this command will show whether Type 2 routes are present. If they are missing, the issue may be with the BGP EVPN configuration or route reflectors. This is the correct verification step.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
Related to this question
Learn chapter
SDN Controllers and Cisco ACI
Key term
Spine-Leaf Architecture
Spine-Leaf architecture is a network topology where every lower-layer switch (leaf) connects to every upper-layer switch (spine) to provide predictable and scalable east-west traffic flow.
Key term
Cisco Virtual Topology System
Cisco Virtual Topology System is a software-defined networking solution that creates and manages virtual network overlays across physical and virtual infrastructure for enterprise networks.
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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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