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300-410 Practice Question: Which TWO configuration changes are required to…
Which TWO configuration changes are required to enable inter-VRF route leaking between VRF A and VRF B using static routes? (Choose TWO.)
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 a static route in VRF B with the 'vrf A' keyword to specify the source VRF for the next-hop.
Route leaking between VRFs can be done using static routes with the 'global' or 'vrf' keywords. To leak a route from VRF A to VRF B, you configure a static route in VRF B pointing to the next-hop in VRF A, and use the 'vrf' keyword to specify the source VRF. Option A is correct because the static route must specify the source VRF. Option D is correct because the next-hop must be reachable in the source VRF. Option B is incorrect because the 'ip route' command does not use 'source-vrf'; it uses 'vrf'. Option C is incorrect because the destination network is the one being leaked, not the next-hop. Option E is incorrect because route leaking does not require a routing protocol; static routes are sufficient.
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 a static route in VRF B with the 'vrf A' keyword to specify the source VRF for the next-hop.
Why this is correct
Correct. Example: 'ip route vrf B 10.1.2.0 255.255.255.0 10.1.1.1 vrf A' leaks the route from VRF A to VRF B.
- ✗
Use the 'ip route vrf B <prefix> <mask> <next-hop> source-vrf A' command syntax.
Why it's wrong here
Incorrect. The correct syntax uses 'vrf' twice: 'ip route vrf B <prefix> <mask> <next-hop> vrf A'. There is no 'source-vrf' keyword.
- ✗
The next-hop IP address must be the interface address of the destination VRF.
Why it's wrong here
Incorrect. The next-hop must be an address in the source VRF (the VRF from which the route is leaked).
- ✓
The next-hop IP address must be reachable in the source VRF (VRF A).
Why this is correct
Correct. The next-hop must be a valid address in the source VRF, reachable via the source VRF's routing table.
- ✗
A dynamic routing protocol must be configured in both VRFs to redistribute the leaked routes.
Why it's wrong here
Incorrect. Route leaking with static routes does not require a routing protocol; the static route directly installs the route.
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.