- A
The spoke's EIGRP stub configuration in named mode does not suppress query propagation for all routes; the hub queries the spoke for routes that are not in the stub's advertised set, causing a stuck-in-active when the spoke is unreachable.
In named mode, the stub command only limits the routes the spoke advertises, but the hub still sends queries to the spoke for all routes. If the spoke is unreachable, the query remains active until the active timer expires.
- B
The spoke's EIGRP stub configuration in named mode automatically sets the 'receive-only' flag, preventing any queries from being sent to the spoke.
Why wrong: 'receive-only' is a separate configuration; default stub in named mode includes 'connected' and 'summary', not 'receive-only'.
- C
The DMVPN tunnel interface on the spoke is configured with 'eigrp stub', which causes the spoke to ignore queries from the hub, but the hub still expects a reply.
Why wrong: The stub configuration does not cause the spoke to ignore queries; it limits the routes advertised but does not affect query processing.
- D
The hub's EIGRP process is in classic mode, while the spoke is in named mode, causing a mismatch in the stub behavior.
Why wrong: EIGRP classic mode and named mode are interoperable; the stub behavior differences are within named mode itself.
Quick Answer
The most likely explanation is that the spoke’s EIGRP stub configuration in named mode does not suppress query propagation for all routes, so the hub still queries the spoke for routes not in the stub’s advertised set, causing a stuck-in-active when the spoke becomes unreachable. In named mode, the default stub setting only advertises connected and summary routes, but if the spoke has additional networks—such as loopbacks or redistributed routes—the hub will send queries for those, and without a reachable reply, the query times out, triggering the stuck-in-active condition. On the Cisco CCNP ENARSI 300-410 exam, this tests your understanding that EIGRP stub in named mode is not a blanket query suppressor; a common trap is assuming the stub keyword alone prevents all queries, but you must explicitly use a leak-map or configure receive-only to fully block them. Memory tip: “Stub stops some, not all—queries leak through unless you plug the hole with a leak-map.”
300-410 DMVPN Practice Question
This 300-410 practice question tests your understanding of dmvpn. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An engineer configures EIGRP named mode on a DMVPN Phase 3 hub with 'eigrp stub' on the spoke routers. Unexpectedly, when a spoke loses its WAN connection to the hub, the hub's EIGRP table shows the spoke's routes as active (stuck-in-active) for an extended period. Which is the most likely explanation?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 spoke's EIGRP stub configuration in named mode does not suppress query propagation for all routes; the hub queries the spoke for routes that are not in the stub's advertised set, causing a stuck-in-active when the spoke is unreachable.
In EIGRP named mode, the stub feature by default includes 'connected' and 'summary' routes, but not 'static' or 'redistributed'. If the spoke is configured as a stub with the default settings, it does not advertise any routes beyond its connected interfaces. However, if the spoke has a loopback or other network that is not directly connected to the EIGRP process, the hub may still query the spoke for those routes, and if the spoke is unreachable, the query times out, causing a stuck-in-active. The corner case is that the stub configuration in named mode does not suppress query propagation for all routes unless explicitly configured with 'leak-map' or 'receive-only'.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The spoke's EIGRP stub configuration in named mode does not suppress query propagation for all routes; the hub queries the spoke for routes that are not in the stub's advertised set, causing a stuck-in-active when the spoke is unreachable.
Why this is correct
In named mode, the stub command only limits the routes the spoke advertises, but the hub still sends queries to the spoke for all routes. If the spoke is unreachable, the query remains active until the active timer expires.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
The spoke's EIGRP stub configuration in named mode automatically sets the 'receive-only' flag, preventing any queries from being sent to the spoke.
Why it's wrong here
'receive-only' is a separate configuration; default stub in named mode includes 'connected' and 'summary', not 'receive-only'.
- ✗
The DMVPN tunnel interface on the spoke is configured with 'eigrp stub', which causes the spoke to ignore queries from the hub, but the hub still expects a reply.
Why it's wrong here
The stub configuration does not cause the spoke to ignore queries; it limits the routes advertised but does not affect query processing.
- ✗
The hub's EIGRP process is in classic mode, while the spoke is in named mode, causing a mismatch in the stub behavior.
Why it's wrong here
EIGRP classic mode and named mode are interoperable; the stub behavior differences are within named mode itself.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
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.
Detailed technical explanation
How to think about this question
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.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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
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.
What to study next
Got this wrong? Here's your next step.
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
Questions learners often ask
What does this 300-410 question test?
DMVPN — This question tests DMVPN — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The spoke's EIGRP stub configuration in named mode does not suppress query propagation for all routes; the hub queries the spoke for routes that are not in the stub's advertised set, causing a stuck-in-active when the spoke is unreachable. — In EIGRP named mode, the stub feature by default includes 'connected' and 'summary' routes, but not 'static' or 'redistributed'. If the spoke is configured as a stub with the default settings, it does not advertise any routes beyond its connected interfaces. However, if the spoke has a loopback or other network that is not directly connected to the EIGRP process, the hub may still query the spoke for those routes, and if the spoke is unreachable, the query times out, causing a stuck-in-active. The corner case is that the stub configuration in named mode does not suppress query propagation for all routes unless explicitly configured with 'leak-map' or 'receive-only'.
What should I do if I get this 300-410 question wrong?
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 18, 2026
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