- A
Two events have triggered EEM applets: a syslog event matching 'OSPF-5-ADJCHG' and an absolute timer named 'MY-TIMER'.
Correct. The output shows two events: one syslog event with pattern OSPF-5-ADJCHG triggered once, and one absolute timer named MY-TIMER triggered once.
- B
Two EEM applets are currently registered: one for syslog and one for timer.
Why wrong: Incorrect. This command shows event history, not registered applets.
- C
The OSPF-5-ADJCHG syslog event triggered an applet that executed a timer.
Why wrong: Incorrect. The events are separate; there is no indication that one triggered the other.
- D
The timer event is a countdown timer that triggered after 5 minutes and 23 seconds.
Why wrong: Incorrect. The timer type is 'absolute', which triggers at a specific time, not a countdown. The time shown is when it triggered.
Quick Answer
The correct interpretation is that two distinct events have triggered EEM applets: a syslog event matching the pattern OSPF-5-ADJCHG and an absolute timer named MY-TIMER. This output from the show event manager history events command confirms that the Embedded Event Manager has successfully detected and acted upon both event types, each recorded with its own trigger count and timestamp. On the Cisco CCNP ENARSI 300-410 exam, this question tests your ability to read EEM event history output and differentiate between event types like syslog patterns and timers, a common troubleshooting scenario for route redistribution or interface tracking issues. A frequent trap is confusing the trigger count with the number of applets; remember that each entry represents a single event type that fired, not the number of applets it launched. For a quick memory tip, think of the output as a logbook: each line is a separate incident, and the event type tells you what kind of trigger pulled the lever—syslog for a message match, timer for a scheduled action.
300-410 Embedded Event Manager (EEM) Practice Question
This 300-410 practice question tests your understanding of embedded event manager (eem). The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 troubleshoot an EEM issue:
R1# show event manager history events
Event History: Event Type : syslog Time : Mar 1 00:05:23 Pattern : OSPF-5-ADJCHG Trigger count : 1
Event Type : timer Time : Mar 1 00:06:00 Timer Type : absolute Timer Name : MY-TIMER Trigger count : 1
What does this output indicate?
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
Two events have triggered EEM applets: a syslog event matching 'OSPF-5-ADJCHG' and an absolute timer named 'MY-TIMER'.
The output shows the event history for EEM. It lists events that have triggered EEM applets. Each entry shows the event type (syslog, timer, etc.), the time it occurred, specific details (pattern for syslog, timer type and name for timer), and the number of times that event triggered an applet. This helps in troubleshooting which events are being matched.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Two events have triggered EEM applets: a syslog event matching 'OSPF-5-ADJCHG' and an absolute timer named 'MY-TIMER'.
- ✗
Two EEM applets are currently registered: one for syslog and one for timer.
Why it's wrong here
Incorrect. This command shows event history, not registered applets.
- ✗
The OSPF-5-ADJCHG syslog event triggered an applet that executed a timer.
Why it's wrong here
Incorrect. The events are separate; there is no indication that one triggered the other.
- ✗
The timer event is a countdown timer that triggered after 5 minutes and 23 seconds.
Why it's wrong here
Incorrect. The timer type is 'absolute', which triggers at a specific time, not a countdown. The time shown is when it triggered.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Command / output trap
Incorrect. This command shows event history, not registered applets.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 300-410 question test?
Embedded Event Manager (EEM) — This question tests Embedded Event Manager (EEM) — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Two events have triggered EEM applets: a syslog event matching 'OSPF-5-ADJCHG' and an absolute timer named 'MY-TIMER'. — The output shows the event history for EEM. It lists events that have triggered EEM applets. Each entry shows the event type (syslog, timer, etc.), the time it occurred, specific details (pattern for syslog, timer type and name for timer), and the number of times that event triggered an applet. This helps in troubleshooting which events are being matched.
What should I do if I get this 300-410 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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