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300-410 Practice Question: Configured IP SLA 50 to monitor a remote router's…
A network engineer configured IP SLA 50 to monitor a remote router's loopback (5.5.5.5) using ICMP echo. The IP SLA is linked to a track object that is used in a PBR (policy-based routing) route-map. The engineer notices that the PBR is not applying the alternate path when the IP SLA goes down. The track object shows 'Down'. What is the most likely misconfiguration?
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 route-map is missing the 'set ip next-hop verify-availability' command with the track object.
PBR with set ip next-hop verify-availability requires the track object to be referenced correctly in the route-map. If the route-map uses 'set ip next-hop verify-availability' but does not include the track keyword, PBR will not react to the IP SLA state.
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 route-map is missing the 'set ip next-hop verify-availability' command with the track object.
Why this is correct
Without 'verify-availability', PBR does not check the track state and will continue using the primary next-hop even if the track is down.
- ✗
The IP SLA probe is using the wrong source interface.
Why it's wrong here
The IP SLA state is 'Down', indicating the probe is failing; source interface is not the issue.
- ✗
The track object is configured with a delay that prevents immediate reaction.
Why it's wrong here
Delay affects when the track state changes, but the track is already 'Down'.
- ✗
The PBR is applied to the wrong interface.
Why it's wrong here
If PBR were on the wrong interface, the alternate path would never be used, but the symptom is that PBR is not reacting to the track state.
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Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
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.
Key term
Policy Based Routing
Policy Based Routing (PBR) is a technology that allows network traffic to be forwarded based on user-defined policies rather than just the destination IP address in the routing table.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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