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300-410 Practice Question: Examine this partial configuration: ``` interface…

Examine this partial configuration: ```

interface GigabitEthernet0/0
 ip vrf forwarding CUSTOMER_F
 ip address 10.10.10.1 255.255.255.0

!

interface GigabitEthernet0/1
 ip vrf forwarding CUSTOMER_G
 ip address 10.10.20.1 255.255.255.0

``` What is required to enable communication between VRF CUSTOMER_F and VRF CUSTOMER_G?

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

✓

Add static routes with the 'vrf' keyword to point to the other VRF's next hop.

By default, VRFs are isolated. To enable communication between them, route leaking must be configured, typically using static routes with the 'vrf' keyword or using route-replicate commands.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    No additional configuration is needed; VRFs can communicate by default.

    Why it's wrong here

    Incorrect. VRFs are isolated by design.

  • ✗

    Configure a route-map and import/export route-targets between the VRFs.

    Why it's wrong here

    Incorrect. Route-targets are used with MP-BGP; for VRF-Lite, route leaking is done via static routes or route-replicate.

  • ✓

    Add static routes with the 'vrf' keyword to point to the other VRF's next hop.

    Why this is correct

    This is correct. Static routes can be used to leak routes between VRFs.

  • ✗

    Use the 'ip route vrf' command to create a global route that points to the VRF interface.

    Why it's wrong here

    Incorrect. The 'ip route vrf' command is used to add routes to a VRF's routing table, not to leak between VRFs directly.

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Same concept, more angles

1 more way this is tested on 300-410

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. Drag and drop the steps to configure inter-VRF route leaking using static routes in VRF-Lite into the correct order, from first to last.

medium
  • ✓ A.Define VRFs and assign route distinguisher
  • B.Configure import and export route targets
  • ✓ C.Assign interfaces to each VRF
  • ✓ D.Configure static routes with VRF keyword
  • ✓ E.Verify leaked routes in VRF routing table

Why A: First, define both VRFs and assign a route distinguisher (RD). Then assign interfaces to the respective VRFs. After that, configure static routes with the VRF keyword to leak routes between VRFs. Finally, verify the leaked routes are present in the VRF routing table. Note that import/export route targets are not used in VRF-Lite; they are only required for MPLS VPN scenarios.

JA

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.