The answer is that the IP SLA is missing the VRF keyword, causing the probe to be sent in the global routing table instead of the VRF context. The root cause is that IP SLA is not VRF-aware by default; without the `vrf BLUE` keyword under the `ip sla 6` configuration, the ICMP echo targets the server in the global table, which cannot reach the VRF’s 10.10.10.10 address, so the track object remains down and the static route is never installed. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your understanding of VRF-aware IP SLA tracking—a common trap where engineers forget to associate the probe with the VRF, leading to a “missing default route” error despite correct static route syntax. The key is that the track object itself does not need the VRF keyword; the IP SLA probe does. Memory tip: “Probe first, track second—VRF goes on the SLA, not the track.”
300-410 IP SLA Practice Question
This 300-410 practice question tests your understanding of ip sla. 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.
An engineer configures IP SLA to track a route to a server in a VRF. Router R1 has:
ip sla 6
icmp-echo 10.10.10.10 source-ip 192.168.1.1
frequency 10
ip sla schedule 6 life forever start-time now
track 6 ip sla 6 reachability
ip route vrf BLUE 0.0.0.0 0.0.0.0 192.168.1.2 track 6
But the route is never installed in the VRF routing table. Show output:
show ip route vrf BLUE | include 0.0.0.0
% No default route found
What is the root cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "never"
Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The IP SLA is not configured with the vrf BLUE option, so the probe is sent in the global table and cannot reach the server in the VRF.
The IP SLA probe is not VRF-aware. By default, IP SLA operates in the global routing table. To track a route in a VRF, the IP SLA must be configured with the vrf keyword. The correct answer is that the IP SLA is not associated with the VRF, so the probe fails or is sent in the wrong context.
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 IP SLA is not configured with the vrf BLUE option, so the probe is sent in the global table and cannot reach the server in the VRF.
Why this is correct
The IP SLA must be configured with 'vrf BLUE' to send probes within the VRF; otherwise, the track will not work correctly.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The source IP 192.168.1.1 is not in the VRF BLUE routing table.
Why it's wrong here
Even if the source IP is in the VRF, the probe still needs the vrf keyword to be sent in the VRF context.
✗
The track 6 is not supported for VRF routes.
Why it's wrong here
Track with IP SLA is supported for VRF routes if the IP SLA is VRF-aware.
✗
The IP SLA schedule must be configured with the vrf keyword.
Why it's wrong here
The schedule command does not have a vrf keyword; it is configured under the IP SLA configuration.
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
Keyword trap
Even if the source IP is in the VRF, the probe still needs the vrf keyword to be sent in the VRF context.
Command / output trap
The schedule command does not have a vrf keyword; it is configured under the IP SLA configuration.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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.
IP SLA — This question tests IP SLA — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The IP SLA is not configured with the vrf BLUE option, so the probe is sent in the global table and cannot reach the server in the VRF. — The IP SLA probe is not VRF-aware. By default, IP SLA operates in the global routing table. To track a route in a VRF, the IP SLA must be configured with the vrf keyword. The correct answer is that the IP SLA is not associated with the VRF, so the probe fails or is sent in the wrong context.
What should I do if I get this 300-410 question wrong?
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.
Are there clue words in this question I should notice?
Yes — watch for: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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