hardMultiple Choice
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ip sla statistics 4
Round Trip Time (RTT) for Index 4 Latest RTT: 300 ms Latest RTT (milliseconds): 300 Latest RTT (microseconds): 300000 Number of successes: 45 Number of failures: 55 Operation time to live: Forever Output: Over threshold
R1# show track 2 Track 2 IP SLA 4 reachability
Reachability is Down 5 changes, last change 00:00:05 Latest operation return code: Over threshold Latest RTT (milliseconds): 300
Tracked by:
ip route 0.0.0.0 0.0.0.0 192.168.2.1 track 2Based on this output, which statement is correct?
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 IP SLA threshold has been exceeded, causing the track to go down and the static route to be removed.
The track shows 'Down' because the IP SLA return code is 'Over threshold'. This means the threshold was exceeded, and the track has brought down the static route. The failures (55) are high, but the key is that the track is down due to the threshold violation.
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 operation is failing because the target is unreachable.
Why it's wrong here
The return code is Over threshold, meaning replies arrived but exceeded the configured RTT threshold; the target is reachable. Unreachable targets produce timeout return codes. This option would fit only if the SLA showed timeouts rather than a threshold breach.
- ✗
The tracked static route is active because the IP SLA has successes.
Why it's wrong here
Track 2 reports Reachability is Down, so the tracked static route is withdrawn regardless of the 45 successes. Success counters are cumulative and do not reflect current state. This reasoning would apply only if the track object itself showed Up.
- ✓
The IP SLA threshold has been exceeded, causing the track to go down and the static route to be removed.
Why this is correct
The IP SLA operation's RTT of 300 ms breaches its configured threshold, so the return code reads "Over threshold". Track 2, bound to IP SLA 4 reachability, transitions to Down, and the tracked static default route via 192.168.2.1 is withdrawn from the routing table.
- ✗
The IP SLA operation has a 55% failure rate, but the track is still up.
Why it's wrong here
The track is Down, not up, because the latest return code is Over threshold; the 55 failures are a cumulative count, not a percentage. A failure-rate interpretation would apply only if the SLA reported timeouts rather than threshold breaches.
Go deeper
Related to this question
Learn chapter
Device Management and Network Monitoring (SNMP, Syslog, NetFlow)
Key term
IP SLA for Path Control
IP SLA for Path Control is a Cisco technology that uses active network measurements to dynamically influence routing decisions and redirect traffic along a preferred path when network conditions change.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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