300-410 VPN Technologies Practice Question
A network engineer is configuring a VRF-aware IPsec VPN. The engineer needs to ensure that the IPsec tunnel traffic is forwarded within the correct VRF on the router. Which command must be configured under the crypto map to bind the IPsec tunnel to a specific VRF?
⚠ Common exam trap
Watch out — candidates often confuse interface-level VRF commands like vrf forwarding with crypto map-level commands, leading to selecting the wrong syntax.
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
✓
set vrf VPN-CORP
To bind an IPsec tunnel to a VRF in a VRF-aware IPsec configuration, the set vrf command is used under the crypto map entry. This ensures that the tunnel's traffic is forwarded using the specified VRF's routing table, allowing overlapping address spaces and segmentation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
set vrf VPN-CORP
Why this is correct
The set vrf command under a crypto map entry specifies the VRF that the IPsec tunnel will use for forwarding. It ensures that the encrypted traffic is routed within the correct VRF, enabling VRF-aware IPsec. This is the correct command to bind the tunnel to a VRF.
- ✗
set ip vrf VPN-CORP
Why it's wrong here
The set ip vrf command does not exist in Cisco IOS for crypto map configuration. The correct command is set vrf. This option is a distractor that might confuse engineers familiar with other VRF-related commands. It is not valid syntax.
- ✗
ip vrf forwarding VPN-CORP
Why it's wrong here
This command is used on interfaces to associate them with a VRF, similar to vrf forwarding. It is not used under crypto map. It does not enable VRF-aware IPsec tunnel binding. The correct command under crypto map is set vrf.
- ✗
vrf forwarding VPN-CORP
Why it's wrong here
The vrf forwarding command is used on interfaces to assign an interface to a VRF, not under a crypto map. It does not bind an IPsec tunnel to a VRF. While it is part of VRF configuration, it is not the correct command for VRF-aware IPsec under crypto map.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
MPLS Layer 3 VPN
A technology that uses Multiprotocol Label Switching to create secure, scalable virtual private networks that connect multiple sites at the network layer, where the service provider manages routing between customer sites.
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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
This 300-410 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 300-410 exam.