350-601 Network Practice Question
A network engineer is troubleshooting a VXLAN EVPN problem where some endpoints are not reachable. The output of 'show bgp l2vpn evpn' shows Type-3 routes but no Type-2 routes for a specific VNI. What should the engineer check?
⚠ Common exam trap
Cisco often tests the distinction between control-plane (BGP route types) and data-plane (VNI/NVE configuration) readiness, trapping candidates who assume Type-3 routes imply full VNI functionality without checking for active MAC learning on the access side.
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
✓
The VLAN corresponding to the VNI has no active ports.
Type-3 routes (IMET routes) are used for BUM traffic forwarding and are advertised when the VNI is configured under the NVE interface, even if no endpoints are active. Type-2 routes (MAC/IP advertisement routes) are only generated when the switch learns a MAC address on a VLAN associated with that VNI. If Type-3 routes exist but Type-2 routes are missing, the VNI is correctly configured for the overlay, but no active ports in the corresponding VLAN are learning MAC addresses, preventing Type-2 route generation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The route-target import/export is misconfigured.
Why it's wrong here
Route-target misconfiguration would affect all route types, not just Type-2, and would be seen in other VNIs.
- ✗
BGP session is not established.
Why it's wrong here
If the BGP session were down, no EVPN routes (including Type-3) would be present.
- ✗
The VNI is not configured under the NVE interface.
Why it's wrong here
If the VNI were not under NVE, Type-3 routes (IMET) would also not be generated for that VNI.
- ✓
The VLAN corresponding to the VNI has no active ports.
Why this is correct
Type-2 routes carry MAC/IP information. Without active ports in the VLAN, no MACs are learned, so no Type-2 routes are advertised.
Visual reference
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
About these practice questions
One of 984 original 350-601 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.