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300-410 Practice Question: Is troubleshooting a site-to-site VPN that…
A network engineer is troubleshooting a site-to-site VPN that intermittently drops. The engineer configured IP SLA 10 to track reachability of the remote LAN gateway (10.1.2.1) using ICMP echo probes every 5 seconds. The IP SLA is used in a static route to influence failover. The engineer notices that the IP SLA state shows 'Active' but the tracked route is not installed. What is the most likely cause?
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 track object is configured with 'ip sla 10 reachability' but the static route references the track object incorrectly.
The IP SLA is active, but the tracked object might not be configured correctly to react to the IP SLA state. The issue is that the track object is not linked to the IP SLA or the threshold is misconfigured.
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 probe is sending packets to the wrong destination IP.
Why it's wrong here
The IP SLA shows 'Active', so the probe is reaching the destination; the destination IP is likely correct.
- ✓
The track object is configured with 'ip sla 10 reachability' but the static route references the track object incorrectly.
Why this is correct
If the track object is not properly linked (e.g., 'track 1 ip sla 10 reachability' missing), or the static route uses a different track number, the route will not be installed even though the IP SLA is active.
- ✗
The IP SLA probe frequency is too high, causing the router to ignore the results.
Why it's wrong here
A high frequency does not cause the router to ignore results; it may increase CPU but does not prevent route installation.
- ✗
The remote gateway is not responding to ICMP echo requests due to firewall rules.
Why it's wrong here
If the remote gateway were not responding, the IP SLA would show 'Timeout' or 'Down', not 'Active'.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.