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300-410 Practice Question: Examine the following configuration: ```…

Examine the following configuration: ```

interface GigabitEthernet0/1
 ip vrf forwarding CUSTOMER_C
 ip address 10.1.1.1 255.255.255.0
 no shutdown

``` What is missing from this configuration to ensure that routes from VRF CUSTOMER_C are properly isolated?

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

✓

Nothing is missing; this configuration provides proper VRF isolation.

The configuration is complete for basic VRF-Lite. VRF isolation is achieved by associating the interface with a VRF, which creates a separate routing table. No additional commands are required for isolation.

Answer analysis

Option-by-option breakdown

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

  • ✗

    A route-target import/export statement under the VRF definition.

    Why it's wrong here

    Incorrect. Route-targets are optional in VRF-Lite and not required for isolation.

  • ✗

    The command 'ip vrf forwarding CUSTOMER_C' must be preceded by 'no ip address' to avoid IP address removal.

    Why it's wrong here

    Incorrect. The order shown is correct; the VRF command is applied before the IP address, so no removal occurs.

  • ✓

    Nothing is missing; this configuration provides proper VRF isolation.

    Why this is correct

    This is correct. The interface is in a VRF, so all traffic uses the VRF-specific routing table, ensuring isolation.

  • ✗

    A 'vrf definition CUSTOMER_C' must be used instead of 'ip vrf' on newer IOS versions.

    Why it's wrong here

    Incorrect. While 'vrf definition' is the newer syntax, 'ip vrf' is still supported on many platforms. The question does not specify IOS version, so both are acceptable.

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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.