hardMultiple ChoiceObjective-mapped
300-410 Practice Question: An engineer configures PBR with a route-map that…
An engineer configures PBR with a route-map that sets the next-hop to 10.0.0.2 for traffic from subnet 192.168.1.0/24. The route-map is applied inbound on interface GigabitEthernet0/0. The engineer also enables 'ip cef' globally. Traffic from 192.168.1.0/24 is not being policy-routed; instead, it follows the routing table. 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 interface needs the 'ip route-cache policy' command to enable CEF support for PBR.
PBR and CEF interact in a specific way: PBR is processed in software (process switching) by default, but CEF-switched packets bypass PBR unless 'ip route-cache policy' is enabled on the interface. Without this command, CEF fast-switches packets, ignoring PBR.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
CEF is disabled globally, causing PBR to fail.
Why it's wrong here
CEF is enabled; disabling it would force process switching, which supports PBR.
- ✓
The interface needs the 'ip route-cache policy' command to enable CEF support for PBR.
Why this is correct
CEF fast-switching bypasses PBR unless policy routing is explicitly enabled in CEF.
- ✗
The route-map is missing a 'set interface' command.
Why it's wrong here
PBR can use set ip next-hop; set interface is not required.
- ✗
The ACL in the route-map is using a named ACL instead of a numbered one.
Why it's wrong here
Named ACLs work fine with PBR.
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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.