The answer is a syslog severity mismatch, because the EEM applet’s event syslog pattern 'NHRP-3-REGISTRATION' looks for severity 3 (error), but a successful NHRP registration in a DMVPN Phase 2 network generates a severity 6 (informational) syslog message, specifically 'NHRP-6-REGISTRATION'. This means the pattern never matches, so the applet does not trigger the email action. On the Cisco CCNP ENARSI 300-410 exam, this question tests your understanding of how EEM event syslog patterns are tied to syslog severity levels, a common trap where candidates focus on the NHRP process or DMVPN Phase 2 spoke-to-spoke tunnels but overlook the severity digit in the pattern. Remember that the number after the facility code (e.g., NHRP-3) directly indicates the severity level, not the event type. A quick memory tip: “If it’s a success, check for a six—EEM won’t match a three with a six.”
300-410 Embedded Event Manager (EEM) Practice Question
This 300-410 practice question tests your understanding of embedded event manager (eem). 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 an EEM applet to monitor DMVPN tunnel events using the event syslog pattern 'NHRP-3-REGISTRATION'. The applet is supposed to send an email when a spoke registers with the NHS. The DMVPN network uses Phase 2 with spoke-to-spoke tunnels. A spoke registers successfully, but the EEM applet does not trigger. 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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Successful NHRP registration generates a syslog message with severity 6 (informational), not severity 3 (error).
In DMVPN Phase 2, spoke-to-spoke tunnels are established dynamically, but the NHRP registration event generates a syslog message only when the spoke registers with the NHS. However, the syslog pattern 'NHRP-3-REGISTRATION' is for error-level messages, while successful registration generates an informational message (NHRP-6-REGISTRATION). The EEM applet is looking for severity level 3, but the actual syslog is severity level 6, so the pattern does not match.
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.
✓
Successful NHRP registration generates a syslog message with severity 6 (informational), not severity 3 (error).
Why this is correct
Correct. The pattern 'NHRP-3-REGISTRATION' is for errors; successful registration uses 'NHRP-6-REGISTRATION'.
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 EEM applet must be configured with 'event nhrp' to capture NHRP events.
Why it's wrong here
EEM does not have a native NHRP event trigger; syslog is used.
✗
The DMVPN Phase 2 does not generate syslog messages for spoke registration.
Why it's wrong here
It does generate syslog, but with a different severity.
✗
The NHS must be configured with 'ip nhrp registration no-syslog' to suppress messages.
Why it's wrong here
There is no such command; the issue is the severity level.
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.
Trap categories for this question
Command / output trap
There is no such command; the issue is the severity level.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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.
Embedded Event Manager (EEM) — This question tests Embedded Event Manager (EEM) — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Successful NHRP registration generates a syslog message with severity 6 (informational), not severity 3 (error). — In DMVPN Phase 2, spoke-to-spoke tunnels are established dynamically, but the NHRP registration event generates a syslog message only when the spoke registers with the NHS. However, the syslog pattern 'NHRP-3-REGISTRATION' is for error-level messages, while successful registration generates an informational message (NHRP-6-REGISTRATION). The EEM applet is looking for severity level 3, but the actual syslog is severity level 6, so the pattern does not match.
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.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer configures an EEM applet to monitor IPsec tunnel failures using the event syslog pattern 'IPSEC-3-IPSEC'. The applet is designed to clear the IPsec security associations. The IPsec tunnel fails due to a transform-set mismatch, but the EEM applet does not trigger. Which is the most likely explanation?
hard
✓ A.Transform-set mismatch generates an IPSEC syslog with severity 4, not severity 3.
B.The EEM applet must use 'event isakmp' to capture IPsec events.
C.The IPsec tunnel failure is not logged because the router drops the packet silently.
D.The transform-set mismatch causes a routing loop that suppresses syslog generation.
Why A: When an IPsec tunnel fails due to a transform-set mismatch, the IKE phase 2 negotiation fails, and the syslog message generated is typically 'IPSEC-4-IPSEC' (severity 4) or 'ISAKMP-4-ISAKMP' (severity 4) depending on the IOS version. The pattern 'IPSEC-3-IPSEC' is for severity 3 errors, which are used for more critical events like SA lifetime expiration or hardware failures. The transform-set mismatch is a negotiation failure, not a critical error, so the syslog severity is lower (4), and the EEM applet does not match.
Last reviewed: Jun 18, 2026
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