350-601 Network Practice Question
In an EVPN-VXLAN fabric, a network engineer notices that MAC addresses learned from an external router are not being advertised as EVPN type-2 routes. The external router is connected to a leaf switch via a Layer 3 port. Which additional configuration is needed on the leaf switch?
⚠ Common exam trap
Cisco often tests the distinction between VLAN-based EVPN (where MACs are learned from the bridge domain) and routed interface EVPN (where MACs come from ARP), leading candidates to incorrectly choose VLAN-related options like `evpn` under the VLAN interface when the scenario involves a Layer 3 port.
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
✓
Configure `ip arp evpn` on the Layer 3 interface.
When an external router is connected via a Layer 3 port, the leaf switch learns the router's MAC address through ARP, not through a VLAN. To advertise this MAC as an EVPN type-2 route, the `ip arp evpn` command must be configured on the Layer 3 interface. This command enables the switch to synchronize ARP entries into the EVPN BGP control plane, allowing MAC/IP advertisement for directly connected hosts on routed interfaces.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure `redistribute host-routes` under the BGP address-family l2vpn evpn.
Why it's wrong here
This redistributes IP host routes, not MAC/IP advertisement.
- ✗
Configure `evpn` under the VLAN interface associated with the external router's VLAN.
Why it's wrong here
This is for Layer 2 VNI, not for Layer 3 interfaces.
- ✓
Configure `ip arp evpn` on the Layer 3 interface.
Why this is correct
Allows the switch to advertise the neighbor's MAC and IP via EVPN.
- ✗
Configure `routing-config` under BGP to enable both MAC-VRF and IP-VRF.
Why it's wrong here
No such command exists; the correct approach is per-interface.
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 |
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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.