Question 1,206 of 2,152

Network Logging and Syslog →easyMultiple ChoiceObjective-mapped

Enable Syslog Logging on Cisco IOS Routers

This 300-410 practice question tests your understanding of network logging and syslog. 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 is troubleshooting a router that is not generating any syslog messages at all, even for critical events like interface flaps. The 'show logging' output shows 'Syslog logging: disabled'. What is the most likely cause?

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.

A
The 'logging on' command is not configured.
Correct because 'logging on' globally enables syslog; without it, no messages are produced.
B
The logging buffer is full and needs to be cleared.
Why wrong: Incorrect because a full buffer does not disable syslog; it only prevents new messages from being stored locally.
C
The router has run out of memory to generate syslog messages.
Why wrong: Incorrect because memory exhaustion would cause other symptoms, and 'show logging' would not show 'disabled'.
D
The 'logging host' command is missing, so no destination is configured.
Why wrong: Incorrect because even without a remote host, local logging to buffer or console would still work if 'logging on' is enabled.

Full breakdown with real-world context →

Quick Answer

The answer is that the global configuration command 'logging on' is missing. This is the most likely cause because, on Cisco IOS routers, syslog logging is disabled by default and must be explicitly enabled with the 'logging on' command; without it, the router will not generate or send any syslog messages, even for critical events like interface flaps, regardless of any other logging destinations configured. On the Cisco CCNP ENARSI 300-410 exam, this tests your understanding of the foundational logging hierarchy—many candidates mistakenly focus on configuring a syslog server or setting severity levels, but the 'show logging' output explicitly stating "Syslog logging: disabled" is the direct clue that the master switch is off. A common trap is assuming that configuring 'logging host' alone activates logging, but it does not. To remember, think of 'logging on' as the light switch: without it, no messages flow, no matter how many bulbs (destinations) you install.

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 'logging on' command is not configured.

The 'show logging' output clearly states that syslog logging is disabled. The most common cause is that the global 'logging on' command is missing from the configuration. Without this command, no syslog messages are generated or sent to any destination.

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.

✓
The 'logging on' command is not configured.
Why this is correct
Correct because 'logging on' globally enables syslog; without it, no messages are produced.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The logging buffer is full and needs to be cleared.
Why it's wrong here
Incorrect because a full buffer does not disable syslog; it only prevents new messages from being stored locally.
✗
The router has run out of memory to generate syslog messages.
Why it's wrong here
Incorrect because memory exhaustion would cause other symptoms, and 'show logging' would not show 'disabled'.
✗
The 'logging host' command is missing, so no destination is configured.
Why it's wrong here
Incorrect because even without a remote host, local logging to buffer or console would still work if 'logging on' is enabled.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Trap categories for this question

Command / output trap
Incorrect because memory exhaustion would cause other symptoms, and 'show logging' would not show 'disabled'.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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.
Use explanations to understand the rule behind the answer.

TExam Day Tips

Underline the problem statement mentally.
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 practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.

What to study next

Got this wrong? Here's your next step.

Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this 300-410 question test?

Network Logging and Syslog — This question tests Network Logging and Syslog — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The 'logging on' command is not configured. — The 'show logging' output clearly states that syslog logging is disabled. The most common cause is that the global 'logging on' command is missing from the configuration. Without this command, no syslog messages are generated or sent to any destination.

What should I do if I get this 300-410 question wrong?

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?

Read the scenario before looking for a memorised answer.

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