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.
This 300-410 practice question tests your understanding of nat and pat. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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?
NAT is using a route map to redirect traffic for translation.
Policy NAT uses route maps to match and redirect traffic.
The route map is blocking all traffic.
Why wrong: The route map is permitting and setting next hop.
NAT is not configured.
Why wrong: The debug shows NAT policy.
The route map is used for routing, not NAT.
Why wrong: The debug is for NAT policy.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
NAT is using a route map to redirect traffic for translation.
The debug shows that a route map is being used for NAT policy-based routing. The 'set ip next-hop' indicates traffic is being redirected, possibly for NAT purposes.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
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.
The route map is blocking all traffic.
Why it's wrong here
The route map is permitting and setting next hop.
NAT is not configured.
Why it's wrong here
The debug shows NAT policy.
The route map is used for routing, not NAT.
Why it's wrong here
The debug is for NAT policy.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
The debug shows NAT policy.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
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.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
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FAQ
NAT and PAT — This question tests NAT and PAT — Static NAT maps one inside address to one outside address..
The correct answer is: NAT is using a route map to redirect traffic for translation. — The debug shows that a route map is being used for NAT policy-based routing. The 'set ip next-hop' indicates traffic is being redirected, possibly for NAT purposes.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 19, 2026
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