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300-410 Practice Question: Is troubleshooting PBR on a Cisco router where…
A network engineer is troubleshooting PBR on a Cisco router where traffic from subnet 172.16.1.0/24 should be forwarded to next-hop 10.10.10.2. The route map 'PBR-172' is applied to interface GigabitEthernet0/0. The engineer notices that the PBR policy is not working at all. The engineer checks the route map configuration and sees 'match ip address 110' and 'set ip next-hop 10.10.10.2'. The engineer also checks the ACL 110 and confirms it matches 172.16.1.0/24. The engineer then checks the interface configuration and sees 'ip policy route-map PBR-172' applied. What should the engineer do next to isolate the issue?
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
✓
Check if the next-hop 10.10.10.2 is reachable via the routing table.
The engineer should verify that the next-hop 10.10.10.2 is reachable via a directly connected interface or a static route. PBR will not forward traffic to a next-hop that is not in the routing table or not directly connected, and will fall back to the routing table. The engineer can use 'show ip route 10.10.10.2' to check reachability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Check if the next-hop 10.10.10.2 is reachable via the routing table.
Why this is correct
Correct because PBR requires the next-hop to be reachable; if not, traffic uses the routing table.
- ✗
Add the 'set ip default next-hop' command to the route map.
Why it's wrong here
Incorrect because 'set ip default next-hop' is used for default routing, not for PBR; it would not fix the issue.
- ✗
Change the route map to use 'set interface' instead of 'set ip next-hop'.
Why it's wrong here
Incorrect because the issue is likely reachability, not the type of set command.
- ✗
Apply the route map to the outgoing interface instead of the incoming interface.
Why it's wrong here
Incorrect because PBR must be applied to the incoming interface; applying to outgoing interface would not work.
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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.