The answer is applying a route-map to the VRF export statement, as this mechanism directly controls which customer routes are advertised from a specific VRF into the VPNv4 address family toward remote PEs. When a route-map is attached to the VRF export configuration, it can filter routes based on attributes like prefix, community, or tag, ensuring that only permitted routes are redistributed into MP-BGP and propagated to a specific remote PE. On the Cisco SPCOR 350-501 exam, this concept tests your understanding of how VRF export policies differ from RD assignment or next-hop manipulation—common traps include confusing route distinguishers (which only create unique prefixes) with actual filtering, or assuming the VPNv4 address-family inherently limits advertisement scope. Remember the key distinction: export route-maps act as a selective valve, not a global pipe. A useful memory tip is “Export to Exclude”—think of the export route-map as the bouncer at the VRF door, deciding which routes get the VPNv4 wristband.
350-501 Services Practice Question
This 350-501 practice question tests your understanding of services. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A service provider is deploying MPLS L3VPN and wants to ensure that routes from a specific customer VRF are only advertised to a specific remote PE. Which mechanism should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Applying a route-map to the VRF export statement
Option B is correct because a route-map on the VRF export can filter which routes are advertised into VPNv4. Option A is incorrect as RD does not filter advertisements. Option C is incorrect because VPNv4 address-family is shared among PEs. Option D is incorrect as next-hop-self does not control route advertisement.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Applying a route-map to the VRF export statement
Why this is correct
Correct. A route-map on export can filter routes before they are advertised to other PEs via VPNv4.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configuring a separate VPNv4 address-family for that PE
Why it's wrong here
Incorrect. VPNv4 address-family is a single address-family per BGP process, not per PE.
✗
Using a unique route-distinguisher per VRF
Why it's wrong here
Incorrect. RD distinguishes routes from different VRFs but does not filter which PE receives them.
✗
Setting the next-hop-self on the PE
Why it's wrong here
Incorrect. Next-hop-self changes the next-hop but does not restrict which PE receives the route.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-501 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which 350-501 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Services — This question tests Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Applying a route-map to the VRF export statement — Option B is correct because a route-map on the VRF export can filter which routes are advertised into VPNv4. Option A is incorrect as RD does not filter advertisements. Option C is incorrect because VPNv4 address-family is shared among PEs. Option D is incorrect as next-hop-self does not control route advertisement.
What should I do if I get this 350-501 question wrong?
Identify which 350-501 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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