- A
NAT is using a route map to redirect traffic for translation.
Why wrong: This is incorrect. The set ip next-hop command is a PBR action; NAT does not use next-hop redirection for translation.
- B
The route map is blocking all traffic.
Why wrong: This is not indicated by the output; the route map is permitting traffic (permit 10) and not blocking all.
- C
NAT is not configured.
Why wrong: NAT is configured, as shown by the debug ip nat policy command being active.
- D
The route map is used for routing, not NAT.
Correct. The set ip next-hop command is characteristic of a route map used for Policy-Based Routing, not for NAT.
Question 1,060 of 2,152
Debug IP NAT Policy
This 300-410 practice question tests your understanding of nat and pat. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 network engineer runs the following command to debug NAT with route maps:
R1# debug ip nat policy
NAT: policy: match ip address 100 NAT: policy: match ip address 100 NAT: policy: match ip address 100 NAT: policy: route-map RM-NAT permit 10 match ip address 100 set ip next-hop 10.0.0.1
What does this output indicate?
Quick Answer
The answer is that NAT is using a route map to redirect traffic for translation, as indicated by the `debug ip nat policy` output. This is correct because the debug reveals the NAT policy engine matching traffic against access-list 100 and then applying the route map `RM-NAT`, which includes a `set ip next-hop` statement. In Cisco NAT with route maps, the `set ip next-hop` command is used to redirect matched packets to a specific next-hop address, often to force traffic through a NAT-enabled interface or a policy-based routing (PBR) hop before translation occurs. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your understanding of how NAT interacts with route maps for policy-based routing, a common topic in the "Infrastructure Services" section. A frequent trap is confusing this with standard NAT overload or static NAT; remember that `debug ip nat policy` specifically shows the route-map matching and redirection logic, not the translation itself. Memory tip: "Policy redirects, NAT translates" — the `set ip next-hop` is the redirect, while the actual translation happens elsewhere.
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
✓
The route map is used for routing, not NAT.
The output shows debug ip nat policy evaluating a route map named RM-NAT. The route map includes set ip next-hop 10.0.0.1, which is a Policy-Based Routing (PBR) action, not a NAT action. Therefore, the route map is misconfigured for NAT; it is actually intended for routing policy. The debug confirms that NAT is processing the route map, but the set next-hop command indicates that this route map is used for routing decisions, not for NAT translation. Hence, option D is correct: the route map is used for routing, not NAT.
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.
- ✗
NAT is using a route map to redirect traffic for translation.
Why it's wrong here
This is incorrect. The set ip next-hop command is a PBR action; NAT does not use next-hop redirection for translation.
- ✗
The route map is blocking all traffic.
Why it's wrong here
This is not indicated by the output; the route map is permitting traffic (permit 10) and not blocking all.
- ✗
NAT is not configured.
Why it's wrong here
NAT is configured, as shown by the debug ip nat policy command being active.
- ✓
The route map is used for routing, not NAT.
Why this is correct
Correct. The set ip next-hop command is characteristic of a route map used for Policy-Based Routing, not for NAT.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between route maps used for NAT (debug ip nat policy) versus route maps used for Policy-Based Routing (debug ip policy), and candidates mistakenly assume set ip next-hop always implies PBR, missing that it is a valid action in NAT policy.
Trap categories for this question
Command / output trap
This is incorrect. The set ip next-hop command is a PBR action; NAT does not use next-hop redirection for translation.
Detailed technical explanation
How to think about this question
Policy NAT allows you to override the default NAT behavior by using a route map to match specific traffic (e.g., based on source/destination IPs or ports) and then redirect it to a different next-hop for translation, often used for load balancing or asymmetric routing scenarios. Under the hood, the router evaluates the route map before performing NAT, and if the match conditions are met, the set ip next-hop command changes the destination IP of the packet to the specified next-hop, which then triggers NAT translation based on the NAT pool or interface. This is distinct from Policy-Based Routing (PBR), which uses the same route-map syntax but is applied with ip policy route-map on an interface.
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.
TExam Day Tips
- 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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this 300-410 question test?
NAT and PAT — This question tests NAT and PAT — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The route map is used for routing, not NAT. — The output shows debug ip nat policy evaluating a route map named RM-NAT. The route map includes set ip next-hop 10.0.0.1, which is a Policy-Based Routing (PBR) action, not a NAT action. Therefore, the route map is misconfigured for NAT; it is actually intended for routing policy. The debug confirms that NAT is processing the route map, but the set next-hop command indicates that this route map is used for routing decisions, not for NAT translation. Hence, option D is correct: the route map is used for routing, not NAT.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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