hardMultiple ChoiceObjective-mapped
300-410 Practice Question: A router is configured with PBR using a route-map…
A router is configured with PBR using a route-map that sets the next-hop to 10.0.0.2 for traffic matching ACL 100. The engineer also configures 'set ip default next-hop 10.0.0.3' in the same route-map sequence. Traffic that matches ACL 100 is forwarded to 10.0.0.2, but traffic that does not match ACL 100 is forwarded to 10.0.0.3 only if there is no route in the routing table. However, the engineer expects all unmatched traffic to go to 10.0.0.3 regardless of the routing table. What is the misunderstanding?
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 'set ip default next-hop' command overrides the routing table only when no route exists; the engineer wants unconditional forwarding.
The 'set ip default next-hop' command is used only when the packet does not have a matching route in the routing table. If a route exists (even a default route), the packet follows the routing table. The engineer should use 'set ip next-hop' instead of 'set ip default next-hop' to force all unmatched traffic to the next-hop.
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 'set ip default next-hop' command overrides the routing table only when no route exists; the engineer wants unconditional forwarding.
Why this is correct
'set ip default next-hop' is conditional on the absence of a route; 'set ip next-hop' is unconditional.
- ✗
The route-map sequence order is incorrect; the default next-hop should be in a separate sequence.
Why it's wrong here
Order does not affect the behavior of set ip default next-hop.
- ✗
The ACL 100 is blocking all traffic, so no traffic matches the set commands.
Why it's wrong here
The issue is about unmatched traffic, not matched.
- ✗
The 'set ip default next-hop' command requires a 'set interface' command to work.
Why it's wrong here
No such requirement exists.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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